Topic:"System Reliability" in M12784

erse Weather Response Standards 33 14 Notification of an oncoming severe weather event 34 15 Percentage of Calls Answered within 45 Seconds 34 16 Polite Disconnect Rate 36 17 Estimated Restoration Time Updates 38 18 Percentage of Customers...

AI summary The document outlines performance standards and reliability metrics for a 2025 Annual Performance Standards Report, including severe weather response, customer service metrics, outage reporting, and reliability benchmarks like SAIDI/SAIFI. It references specific feeders (e.g., 57W-402, 91W-411) and transmission systems, emphasizing customer restoration times and infrastructure reliability.

CUSTOMER-LEVEL RELIABILITY DATA 86 6 5.0 MAJOR EVENT DAYS AND EXTREME EVENTS DAYS IN 2025 93 7 5.1 Major Event Day – December 3, 2025 94 8 5.2 Extreme Event Day and Major Event Day – December 19-20, 2025 100 9 6.0 PLANNED OUTAGES ON NS POW...

AI summary The document outlines a 2025 Annual Performance Standards Report focusing on customer-level reliability data, major event days (e.g., December 3, 2025, and December 19-20, 2025), planned outages on NS Power’s system, and 2026 performance standards. Filed on March 31, 2026, it includes appendices and sections detailing system reliability and outage management.

e 3 of 115 2025 Annual Performance Standards Report Non-Confidential 1 LIST OF APPENDICES 2 Description Appendix 3 4 Regular Business Calls Answered Within 30 Seconds A 5 Customer Bills Estimated B 6 ETRs Communicated Without Delay and Out...

AI summary The document outlines the 2025 Annual Performance Standards Report, listing appendices covering metrics such as customer service response times, outage management, and service connection timelines. Filed on March 31, 2026, it details performance benchmarks across operational categories.

1 TABLE OF FIGURES 2 3 Figure 1 - Improvement in Outage Frequency (SAIFI) ................................................................ 12 4 Figure 2 - Improvement in Outage Duration (SAIDI) ................................................

AI summary The document presents a table of figures outlining performance metrics, service standards, and customer service data from a regulatory proceeding. Key themes include outage frequency and duration improvements, customer service response times, billing trends, system availability, and new connection standards.

...................................... 35 17 Figure 15 - Historical Polite Disconnect Rate .............................................................................. 36 18 Figure 16 – ETR Operations Dashboard .............................

AI summary The document lists figures related to outage events, restoration times, and reliability targets from the 2025 Annual Performance Standards Report, filed on March 31, 2026. It includes metrics like SAIDI, SAIFI, and customer restoration rates, reflecting performance monitoring and system reliability goals.

1 Figure 28 - SAIDI Improvement Projection ................................................................................. 51 2 Figure 29 - Annual Tree Contact Outage Hours ...................................................................

AI summary The text lists figures related to infrastructure reliability, vegetation management, and outage reduction efforts, including SAIDI projections, tree contact outages, equipment failures, and emergency response planning along specific routes.

............................................................................ 67 16 Figure 46 - Wreck Cove Bring-to-Roadside Project..................................................................... 70 17 Figure 47 - Pleasant Bay Road Wi...

AI summary The text lists infrastructure projects and reliability investments for Nova Scotia Power, including road widening, tree trimming, and feeder performance improvements on specific power lines (e.g., 57W-402, 91W-411). It highlights efforts to enhance grid reliability, reduce outages, and track CKAIFI contributions over time.

1 Figure 59 - CEMI-4 Annually (2020 – 2025) ............................................................................... 87 2 Figure 60 - CEMI-5 Annually (2020 -2025).........................................................................

AI summary The document lists figures focusing on reliability metrics, customer outage profiles, storm performance standards, and NS Power's operational territories from 2020–2025. Key metrics include SAIDI/SAIFI values, customer interruption durations, and crew deployment data for storm events in December 2025.

......................................... 102 17 Figure 74 - December 19-20, 2025 Customer Outage Profile .................................................... 103 18 Figure 75 - Customer Service Storm Metrics for December 19-20, 2025 EED/M...

AI summary The text lists figures from a 2025 Annual Performance Standards Report, detailing outage metrics (SAIDI, SAIFI), customer service storm metrics, crew information, and planned outage comparisons between 2024 and 2025. It includes performance targets for 2026 and references filings dated March 31, 2026.

1 1.0 INTRODUCTION – NOVA SCOTIA POWER’S COMMITMENT TO 2 RELIABILITY 3 4 At Nova Scotia Power, our team is focused on providing safe and reliable electricity to Nova 5 Scotians when and where they need it. Across the province each day, mor...

AI summary Nova Scotia Power (NSP) outlines its commitment to reliability through the $1.3 billion Five-Year Reliability Plan (2025–2029), aiming to reduce outage frequency and duration while maintaining affordable rates. Key initiatives include vegetation management, equipment upgrades for extreme weather resilience, and grid modernization. Progress in 2025 included $206 million in grid improvements.

ese 23 areas in Year 1: 24 25 (1) Vegetation Management & Tree Trimming 26 (2) Upgrading & Maintaining Equipment to better withstand extreme weather 27 (3) Modernizing the Grid 28 DATE FILED: March 31, 2026 Page 8 of 115 2025 Annual Perfor...

AI summary The 2025 Annual Performance Standards Report outlines Year 1 initiatives focusing on vegetation management, equipment upgrades for extreme weather resilience, and grid modernization to enhance system reliability.

Page 8 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Reliability Plan Highlights

AI summary The 2025 Annual Performance Standards Report highlights key aspects of reliability planning, focusing on system reliability and grid modernization initiatives by Nova Scotia Power.

2 NS Power is already seeing positive results from the $206 million invested in the first year of 3 the reliability plan. There was a 19 percent reduction in outages due to trees coming into 4 contact with power lines in 2025 compared to 2...

AI summary NS Power reports a 19% reduction in tree-related outages and 18% reduction in equipment failure outages in 2025, attributed to $206M in reliability plan investments. Performance metrics SAIFI (1.57) and SAIDI (4.79) show improved reliability, with vegetation management investments reaching $45M in 2025, up 80% from 2019-2023 averages. The 2026 ACE Plan aims to balance reliability improvements with rate affordability.

1 • Targeted reliability work on 46 priority feeders across the province was completed in 2 2025 for targeted equipment replacements, protection upgrades, load growth upgrades, 3 building to roadside and tree trimming. 4 5 • Out of the 405...

AI summary NS Power completed targeted reliability work on 46 feeders in 2025, achieving outage reduction targets and meeting adverse weather performance standards. Community engagement efforts and infrastructure upgrades like storm-hardened systems were highlighted as key initiatives to improve reliability and customer experience.

plementation of installing larger, stronger poles and storm-hardened 27 system upgrades, such as coastal framing and clamp top insulators, to increase the 28 resiliency of the system. DATE FILED: March 31, 2026 Page 10 of 115 2025 Annual P...

AI summary The document outlines infrastructure upgrades to enhance grid resilience, including storm-hardened poles, coastal framing, and clamp top insulators. It also details 2025 upgrades to substations and protective devices with remote control and telemetry, aiming to reduce outage durations through grid modernization.

now under way for 22 3 additional devices for substations in 2026. Grid Modernization upgrades such as these are 4 proven methods to decrease the duration of outages for customers. 5 Nova Scotia Power is committed to meeting the establishe...

AI summary Nova Scotia Power is investing in grid modernization to improve reliability and reduce outages, targeting a 20% reduction in SAIDI by 2029 and enhancing resilience against climate change. The Five-Year Reliability Plan, detailed in the 2025 and 2026 ACE Plans, focuses on operational improvements and targeted investments to meet performance standards.

adverse weather events due 21 to climate change and achieve the Performance Standards for restoring service to 91.98 percent of 22 customers within 48 hours after a Major Event Day. 23 While there is much work ahead, the Plan is showing re...

AI summary NS Power reports a 31% reduction in outage frequency (SAIFI) and 8.5% improvement in outage duration (SAIDI) from 2021-2025, with 93% of customers restored within 48 hours post-major events. The 2025 Annual Performance Standards Report highlights progress toward reliability targets, including 91.98% service restoration within 48 hours.

f 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 2 - Improvement in Outage Duration (SAIDI) Performance Standards SAIDI 6.00 5.00 4.00 SAIDI 3.00 2.00 1.00 0.00 2021 2022 2023 2024 2025 Year 2 3 Figure 2 shows the a...

AI summary The 2025 Annual Performance Standards Report highlights a reduction in SAIDI (System Average Interruption Duration Index) from 5.23 to 4.79 hours between 2021 and 2025, with expected further improvements from the Five-Year Reliability Plan investments.

1 2.0 2025 PERFORMANCE STANDARDS IN CONTEXT 2 3 In 2025, the Performance Standards for SAIFI and SAIDI continued to trend positively. Tree 4 contact outages showed further improvement, and equipment-related interruptions in 2025 5 were amo...

AI summary In 2025, NS Power improved SAIFI and SAIDI metrics but missed SAIDI targets due to a cyber incident in April 2025. The incident led to manual meter readings, customer outreach, and delayed billing. Call volume to customer service increased by 46%, prompting staff expansion. NS Power addressed impacts through forums and adjusted billing processes.

NS Power responded by increasing the number of agents available to take calls and 26 address customer concerns during this time. NS Power was able to train 40 additional staff 27 and return to meeting the metric of answering 70 percent of...

AI summary NS Power increased call center staff to meet customer service metrics, achieving 70% call resolution within 30 seconds. Performance standards exclude planned outages and major event days but include foreign interference events like vehicle accidents and dig-ins, which accounted for over 10% of 2025 SAIDI interruptions.

sm 19 20 The impact of these foreign interference events on the 2025 SAIDI Target is shown in Figure 21 3. These events accounted for over 10 percent of total customer hours of interruption. 22 DATE FILED: March 31, 2026 Page 15 of 115 202...

AI summary NS Power's 2025 SAIDI performance was impacted by foreign interference events, contributing over 10% of customer interruption hours. Without these events, NS Power would have met the SAIDI threshold. The report highlights ongoing efforts to improve outage resilience and plans to collaborate with the Energy Board on 2027 performance standards, leveraging CEATI and Electricity Canada initiatives.

g new potential metrics to help evaluate 15 resiliency and reliability performance has focused in two areas: CEATI’s Grid Resiliency 16 Working Group and Electricity Canada reliability programs. DATE FILED: March 31, 2026 Page 16 of 115 20...

AI summary The document discusses efforts to evaluate grid resiliency and reliability performance through initiatives by CEATI’s Grid Resiliency Working Group and Electricity Canada reliability programs. It references the 2025 Annual Performance Standards Report as a context for these evaluations.

1 NS Power endeavors to leverage these industry groups to identify and validate straightforward, 2 quantitative measures of reliability that are easy to communicate to stakeholders, and 3 customers. If a potential new metric does not provi...

AI summary NS Power emphasizes using validated reliability metrics for risk mitigation and improving feeder performance. As performance improves, thresholds for metrics like CKAIFI become stricter, raising the bar for feeders. The 2025 CKAIFI threshold was reduced by 16% from 2024, reflecting tighter standards as industry performance improves.

Non-Confidential 1 Figure 5 - 2025 Monthly CKAIDI 2025 Monthly CKAIDI 25 5-Year Average 20 Threshold, 17.35 15 Threshold, 16.54 CKAIDI 10 5 - Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 85S-401 91W-411 81S-305 30N-412 78W-302 78W-301 8...

AI summary Figure 5 illustrates 2025 monthly CKAIDI performance, showing feeder 85S-401 exceeded thresholds. Contextual factors like cyber incidents and external outages are highlighted, aligning with the Board’s guidance (M10279) to include context in performance reporting. This provides nuance to 2025 results while maintaining unchanged performance standards.

Page 19 of 115 2025 Annual Performance Standards Report Non-Confidential 1 2.2 Summary of NS Power’s Results 2 3 In 2025, NS Power met nine of 14 performance standards. The Company did not achieve five 4 of the standards: SAIDI, CKAIDI for...

AI summary NS Power's 2025 Annual Performance Standards Report indicates the company met nine of 14 performance standards, missing targets for SAIDI, CKAIDI (one feeder), CKAIFI (two feeders), Regular Call Answer Rate, and Estimated Bills. Reliability metrics like SAIFI and CKAIDI show mixed results, with some feeders achieving targets while others fell short. Appendix M and figures summarize the findings.

4.21 76V-301 Achieved: 2.93 57S-401 Achieved: 2.65 Adverse NS Power to notify Notification of customers of the Weather Target Met EOC Opening decision to open the Response EOC within 4 hours DATE FILED: March 31, 2026 Page 20 of 115 2025 A...

AI summary The 2025 Annual Performance Standards Report details NS Power's achievement of targets for outage call answer rates (85% within 45 seconds during severe outages), polite disconnects (3.6% annually), and ETR updates provided without delay. It also outlines procedures for notifying customers during adverse weather events and restoring power within 48 hours for significant events.

Days: 95.05% of N/A customers restored within 48 hours. Percent Major Event Days: Target Met: Customers 91.98% of customers restored in 48 December 3 – 100% restored within 48 hours December 20 – 99.45% hours. Extreme Event Days: 78.38% of...

AI summary The 2025 Annual Performance Standards Report details Nova Scotia Power's outage restoration performance, showing 95.05% of customers restored within 48 hours. Targets for major and extreme event days were met, with 100% and 98.74% restoration rates achieved respectively. The report tracks compliance with outage reporting standards and service reliability metrics.

Service Installation Line Extension ≤ 10 5.1 days Poles: ≤6.2 days Service Installation Line Extension ≥ 10 4.8 days Poles: ≤ 13.7 days. 1 Only SEDs which fall after an MED or EED are considered under this metric. In 2025 there were 2 SEDs...

AI summary The document outlines 2025 service installation timelines for NS Power, noting performance standards not met. It references SEDs (Service Interruption Events) and their relationship to MEDs/EEDs, with 2025 SEDs not following MED/EED occurrences. The report is part of NS Power's 2025 Annual Performance Standards Report, highlighting system reliability and performance monitoring issues.

Page 22 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 7 – 2025 Performance Standards Not Met Category Standard Target 2025 Result SAIDI ≤4.29 4.79 85S-401 CKAIDI 16.54 Not Achieved: 20.91 Reliability 57W-402 Not...

AI summary NSP's 2025 Annual Performance Standards Report shows missed targets for reliability metrics (SAIDI: 4.79 vs ≤4.29) and customer service (60.6% call answer rate vs 70% target, 37.8% estimated bills vs ≤2.0% target). Non-achievement is cited with references 85S-401, 57W-402, and 91W-411.

Page 28 of 115 2025 Annual Performance Standards Report Non-Confidential 1 The Company responded to the loss of its primary billing process with back-up continuity 2 protocols, including implementing a manual meter reading program. NS Powe...

AI summary NS Power addressed a 2025 cyber incident disrupting billing systems by implementing manual meter reading, training staff, and restoring AMI connectivity. Over 90% of meter connectivity was restored by the report's filing, though the incident caused a surge in estimated bills (1.0% in 2024, 0.7% in 2023). Customer outreach included payment deferrals and community forums.

26 Page 29 of 115 2025 Annual Performance Standards Report Non-Confidential 1 achieving the NSEB’s target for this performance standard. The HVCA system is equipped on 2 the toll-free outage line and is designed to answer up to 40,000 cust...

AI summary The 2025 Annual Performance Standards Report details Nova Scotia Power's outage communication systems, including the HVCA system's capacity to handle 40,000 calls per hour and 99.8% availability in 2025. Contingency plans ensured service continuity during HVCA downtime caused by planned maintenance. ADMS and SCADA systems achieved 99% availability, while the Outage Map was available 99.5% of the time.

re systems. Planned maintenance is coordinated to avoid 16 times when weather might pose a risk to the power system. 17 18 Figure 10 – System Availability for Customer Notification of Outages 2025 % of Hours % of hours System was System wa...

AI summary The 2025 Annual Performance Standards Report details system availability for customer outage notifications, highlighting the Data Network's 33.42% downtime due to a cyber incident and containment efforts. Contingency plans maintained outage map availability during this period, with ADMS at 99% uptime and HVCA at 99.8%.

2025 Annual Performance Standards Report Non-Confidential 1 3.2 Adverse Weather Response Standards 2 The NSEB approved the following metrics associated with adverse weather response standards: 3 4 (a) Customer notification of an oncoming s...

AI summary The NSEB approved adverse weather response standards for 2025, including metrics for customer notification during severe weather, call handling during outages, polite disconnect rates, ETR updates, and restoration targets for major/extreme weather events. These standards aim to improve emergency response and system reliability.

Page 37 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Estimated Restoration Time Updates 2 The description of this standard and the applicable target are set out in Appendix O. NS Power 3 is required to provide updated...

AI summary NS Power met 2025 performance standards for uninterrupted ETR system access via outage maps, HVCA, social media, and contingency sites. The Board’s 2018 decision directed NS Power to analyze ETR accuracy against actual restoration times for potential refinements.

Page 38 of 115 2025 Annual Performance Standards Report Non-Confidential 1 annual reports and to illustrate whether the ETRs actually become more accurate as the restoration 2 process progresses. 3 3 4 In its order regarding the updated Pe...

AI summary NS Power discusses its Estimated Time of Restoration (ETR) accuracy, customization by region and population density, and 2021 refinements to community-level ETRs. Automated ETRs are adjusted for storm events using historical weather data and reviewed every six months to improve reliability and accuracy.

Page 39 of 115 2025 Annual Performance Standards Report Non-Confidential 1 In 2023 NS Power implemented enhancements to the operational Field Maps tool which enable 2 front-line staff such as crew leads and PLTs to update field-validated E...

AI summary NS Power enhanced its ETR process in 2023 by allowing real-time updates via Field Maps, integrating AMI data to refine outage scopes, and using an ETR dashboard in the EOC to monitor and adjust restoration targets during outages.

updated field condition data. Figure 16 below shows a screenshot of NS Power’s 19 Internal ETR Operations Dashboard for tracking long duration and events with the upcoming or 20 expired ETRs 21 DATE FILED: March 31, 2026 Page 40 of 115 202...

AI summary The text discusses NS Power's use of an ETR Operations Dashboard to track outage restoration times, highlighting variables affecting ETR accuracy (e.g., weather, accessibility) and reporting 2025 outage statistics, including 61% of ETRs accurate within ±4 hours. It emphasizes the dynamic nature of ETRs due to unpredictable field conditions.

and 32 5 percent were accurate within plus or minus two hours for all outages, including two MEDs and 6 one EED occurring in December. 7 8 Figure 17 – Outage Events by Number of ETR Updates Outage Events by Number of ETR Updates 16000 1400...

AI summary The text discusses ETR (Estimated Time of Restoration) accuracy for outage events in 2024 and 2025, noting 32% accuracy within ±2 hours, including MEDs and EEDs in December. Figures 17 and 18 compare outage event data and customer impact metrics, highlighting performance standards and restoration timelines.

0% 1st ETR 2nd ETR 3rd ETR 4th ETR 5th ETR 6th and Above 2025 # of Customer Impacted 2024 # of Customer Impacted 2025 % Restored between -2 to +2 hours of ETR 2024 % Restored between -2 to +2 hours of ETR 2025 % Restored between -4 to +4 h...

AI summary NS Power's 2025 ETR accuracy improved compared to 2024, with 68-91% of customers restored within 4 hours and 42-75% within 2 hours. The report highlights ongoing efforts to enhance customer experience during outages.

1397 474 379 0 1 ETR 2 ETRs 3 ETRs 4 ETRs 5 ETRs or more 2 3 Figure 19 shows that less than 27 percent of all outage events had multiple ETRs, highlighting 4 NS Power’s efficiency and accuracy in the initial assessment of the outages. Addi...

AI summary NS Power demonstrated efficiency in outage restoration, with less than 27% of outages requiring multiple ETRs. The 2025 Annual Performance Standards Report confirms NS Power met targets for restoring 95.05% of customers within 48 hours during significant events, 91.98% during major events, and 78.38% during extreme events.

(Percentage) 2017-2024 Average 96.19 96.57 83.67 Standard Deviation 5.65 6.23 14.52 2025 Target 95.05 91.98 78.38 13 14 The 48-hour period for event day restoration is considered to begin with the first event-related 15 outage on the same...

AI summary NS Power's 2025 restoration performance met or exceeded targets for Major Event Days (MEDs) and Extreme Event Days (EEDs), with 99.45% and 98.74% of customers restored within 48 hours, respectively. The report highlights two MEDs and one EED in 2025, with specific outage data for December 2025 events.

Restored Impacted (%) Hours December 19, 2025 180,189 182,495 78.38 98.74 4 5 Outage Report for events impacting > 30,000 customers 6 The description of this standard and the applicable target are set out in Appendix O. NS Power 7 is requi...

AI summary NS Power filed outage reports for two 2025 weather events impacting over 30,000 customers, as required by the NSUARB's reliability standards. The reports were filed under matters M12707 and M12728. The NSUARB approved performance standards including SAIFI and SAIDI metrics for system reliability.

(b) System Average Interruption Duration Index ("SAIDI") 7 (c) Circuit Average Interruption Frequency Index ("CKAIFI") 8 (d) Circuit Average Interruption Duration Index ("CKAIDI") 9 10 SAIFI is how often customers experienced outages on av...

AI summary The document explains SAIDI and SAIFI metrics for 2025, detailing NS Power's results against targets. SAIFI (outage frequency) was met (1.57 vs. target 2.05), but SAIDI (outage duration) exceeded the target (4.79 vs. 4.29). Metrics exclude SEDs, MEDs, and EEDs.

2.05 1.57 2 3 Figure 25 and Figure 26 below provide graphical representations of the SAIDI and SAIFI monthly 4 results in 2025. 5 6 Figure 25 -2025 SAIDI Result 5.5 2025 Performance Standards SAIDI 5 4.79 4.5 4 4.24 4.29 3.86 3.5 3.62 3.43...

AI summary The text references graphical representations (Figures 25 and 26) showing SAIDI and SAIFI monthly results for 2025, with a threshold indicated in Figure 25. The document is part of a 2026 filing related to 2025 performance standards.

25 SAIFI Result 2.5 2025 Performance Standards SAIFI 2 2.05 1.5 1.57 1.36 SAIFI 1.26 1.13 1.17 1 0.96 0.85 0.73 0.5 0.58 0.42 0.33 0.17 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2025 Threshold 2 3 Figure 26 shows the monthly progre...

AI summary NS Power achieved the best SAIFI result since 2012 in 2025, with SAIFI staying below target and reliability improving. SAIDI slightly exceeded target in December but showed year-over-year improvement aligned with the Five-Year Reliability Plan.

, there was a year-over-year 6 improvement that is aligned with NS Power’s Five-Year Reliability Plan and reliability is 7 improving for customers. 8 9 Five-Year Reliability Plan 10 The 2025 Performance Standards results for SAIDI and SAIF...

AI summary NS Power reported year-over-year reliability improvements aligned with its Five-Year Reliability Plan, citing 2025 SAIDI/SAIFI performance results and budget adherence for the first year of the 2025 ACE Plan. Investments targeted outage-impact areas, with the 2025 and 2026 ACE Plans ensuring on-budget execution.

of 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 27 - Five-Year Reliability Plan Overview Reliability Total 2025 2026 2027 2028 2029 Program ($) Plan Storm Hardening - Targeted 152.4 181.1 198.7 192.4 191.8 916.4 E...

AI summary The 2025 Annual Performance Standards Report outlines a Five-Year Reliability Plan targeting a 20% reduction in SAIDI (from 5.10 to 4.29) and improved grid resilience via storm hardening, equipment upgrades, and advanced grid modernization. Investments total $1,259.3M by 2029, with 2025 SAIDI results showing improvement over 2024 despite remaining above targets.

esult is still above the Performance Standards target of 4.29, the result is 13 a marked improvement over 2024 and on track for the projections as previously filed and shown 14 in Figure 28. 15 DATE FILED: March 31, 2026 Page 50 of 115 202...

AI summary The 2025 SAIDI (System Average Interruption Duration Index) of 4.79 shows improvement over 2024's 5.26 and aligns with projections targeting 4.10 by 2029, though it remains above the 4.29 Performance Standards threshold. Progress is attributed to ongoing reliability initiatives.

1 0 2024 2025 2026 2027 2028 2029 SAIDI Actual Projected SAIDI Average SAIDI (2019 - 2023) 2029 5YR Plan Target Performance Standards Target 2 3 Figure 28 shows the projection of SAIDI improvements over the Five-Year Reliability Plan. 2025...

AI summary The 2025 Annual Performance Standards Report projects SAIDI improvements under the Five-Year Reliability Plan, noting 2025 performance fell below projections. Reductions in SAIDI and SAIFI are attributed to fewer tree-caused and equipment-failure-related outages. Figures 29 and 30 highlight improvements in customer outage hours and events.

3,500 Customer Hours of Interruption (CHI) 700,000 3,000 Customer Interruptions (CI) 600,000 2,500 500,000 2,000 400,000 1,500 300,000 1,000 200,000 100,000 500 0 0 2020 2021 2022 2023 2024 2025 Customer Outage Hours Outage Event Count 2 3...

AI summary Figure 29 indicates a reduction in Tree Contact outage events since 2022, with 2025 outage hours being the lowest since 2020, reflecting improvements in system reliability and outage management.

Customer Outage Hours Outage Event Count 2 3 Figure 29 shows a reduction in Tree Contact outage events since 2022 with 2025 outage hours 4 being the lowest since 2020. 5 DATE FILED: March 31, 2026 Page 52 of 115 2025 Annual Performance Sta...

AI summary The text references Figure 29 showing reduced Tree Contact outage events since 2022, with 2025 having the lowest hours since 2020. Figure 30 presents 2025 data on Annual Equipment Failure Outage Hours, including metrics for Customer Hours of Interruption (CHI) and Customer Interruptions (CI).

1,500 200,000 1,000 100,000 500 0 0 2020 2021 2022 2023 2024 2025 Customer Outage Hours Outage Event Count 2 3 Figure 30 shows the Equipment Failure outage event count dropping each year and the outage 4 hours being the lowest since 2021....

AI summary NS Power completed reliability upgrades on 46 priority feeders in 2025, including equipment replacements and vegetation management. Outage hours reached their lowest level since 2021, with equipment failure events declining annually. The work is detailed in Appendix G of the 2026 Annual Capital Expenditure Plan (M12619).

15 2025 Annual Performance Standards Report Non-Confidential 1 (d) Build-to-Roadside 2 (e) Vegetation Management 3 These feeders were identified through inspections, engineering studies, field discussions and 4 outage history. These target...

AI summary The 2025 Annual Performance Standards Report outlines NSP's targeted investments in feeders, substation upgrades, and FLISR technology to improve reliability. Upgrades include remote control and telemetry for 23 protective devices, with $10.7M allocated in the 2026 ACE Plan for communication enhancements. The FLISR project is filed with the NSEB under matter M12417.

rovince. The FLISR Implementation 13 project includes work on Wreck Cove Feeder 85S-401 and is filed with the NSEB under matter 14 M12417 and is detailed below. 15 Reliability Engagement 16 The Reliability team has focused on supporting st...

AI summary The FLISR Implementation project on Wreck Cove Feeder 85S-401 is filed under NSEB matter M12417. NS Power's Reliability team engages stakeholders, including community leaders, through reliability updates, customer support, and regional Reliability Advisors across four provincial regions. Figure 31 lists 84 reliability engagements completed in 2025.

ort Non-Confidential 1 Figure 31 lists the 84 reliability engagements completed in 2025. 2 Figure 31 - 2025 Reliability Engagements

AI summary The document references Figure 31, which lists 84 reliability engagements completed in 2025, highlighting the volume of reliability-related activities undertaken during that year.

tomer Support Roadshow - Inverness December-25 Elected Official Meeting June-25 Customer Support Roadshow - Pictou December-25 Elected Official Meeting 1 2 NS Power is committed to meeting and listening to customers and stakeholders as the...

AI summary NS Power emphasizes customer engagement through roadshows and meetings, aligning with the Five-Year Reliability Plan and 2026 ACE Plan. Climate change impacts, including 93 hours of 80+ km/h winds in 2025, are addressed through infrastructure resilience improvements and updated pole standards, reducing storm-related disruptions.

Page 56 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Vegetation Management 2 As outlined in NS Power’s Five-Year Reliability Plan Update, an additional $45 million in 3 distribution and transmission tree trimming and...

AI summary NS Power plans to invest $45 million in 2026 for vegetation management, targeting tree contact as the leading cause of outages. The plan includes trimming, right-of-way widening, and new corridor establishment to improve infrastructure reliability.

on of the vegetation management plan, highlighting all 4 the areas across the province where tree trimming and clearing are planned to occur. 5 6 Reliability Focus and Next Steps in 2026 7 NS Power has committed to executing on the $234 mi...

AI summary NS Power has increased its 2026 budget for the Five-Year Reliability Plan to $234 million, up from $206 million in 2025 and $185 million annually previously. The document also references CKAIDI and CKAIFI standards in the 2025 Annual Performance Standards Report.

ge 58 of 115 2025 Annual Performance Standards Report Non-Confidential 1 3.4 CKAIDI and CKAIFI Standards 2 CKAIDI refers to the average combined duration of all power interruptions for customers 3 connected to a particular circuit (feeder)...

AI summary The 2025 Annual Performance Standards Report discusses CKAIDI and CKAIFI metrics, which measure power interruption duration and frequency on specific circuits. Six of seven feeders met CKAIDI targets, while two of six failed CKAIFI targets. Results are location-specific, contrasting with system-wide SAIDI/SAIFI metrics. Appendix O outlines standards, and Figure 35/36 detail 2025 results.

5 16 Two of the six feeders, 91W-411 Middlefield and 57W-402 Caledonia, tracked under the CKAIFI 17 metric in 2025 did not meet the year-end targets. 18 19 Figure 35 – 2025 CKAIDI Results 2025 Top 5% 2025 Ranking 2025 CKAIDI 2025 (Percenta...

AI summary In 2025, two feeders (91W-411 Middlefield and 57W-402 Caledonia) missed CKAIFI targets, while only feeder 85S-401 exceeded the CKAIDI threshold of 16.54, with a result of 20.91. Other feeders fell below the threshold but did not meet targets.

mance Standards Report Non-Confidential 1 Figure 35 shows that only feeder 85S-401 missed the CKAIDI 2025 Target. 2 3 Figure 36 – 2025 CKAIFI Results 4 2025 2025 Top 5% 2025 5 Ranking CKAIFI 2025 Threshold (Percentage) Result 6 57W-402 Y 9...

AI summary The report indicates that several feeders, including 85S-401, 57W-402, and 91W-411, missed their 2025 CKAIDI and CKAIFI targets. The thresholds for these metrics were among the lowest since the start of performance standards, reflecting improved average circuit performance. Supporting documentation is provided in Appendix I.

mong the lowest they have since the 24 beginning of performance standards. Thresholds for CKAIDI and CKAIFI continue to drop as 25 average circuit performance improves as shown in Figure 37. 26 DATE FILED: March 31, 2026 Page 60 of 115 202...

AI summary The 2025 Annual Performance Standards Report highlights continued improvements in circuit performance, with CKAIDI and CKAIFI thresholds reaching their lowest levels since 2017. Figure 37 illustrates the historical trend, showing 2025 as the lowest year for CKAIFI and second-lowest for CKAIDI, reflecting enhanced system reliability metrics.

16.54 4.21 2 3 Figure 37 shows the annual thresholds for CKAIDI and CKAIFI dating back to 2017. The 2025 4 thresholds are the lowest ever for CKAIFI and the second lowest for CKAIDI. 5 Annual performance thresholds are calculated as the pr...

AI summary The 2025 annual performance thresholds for CKAIDI and CKAIFI are the lowest ever recorded, reflecting improved system reliability and reduced variability across NS Power’s feeders. Only three feeders missed their targets despite lower thresholds, with specific challenges noted for feeder 85S-401.

Page 61 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Wreck Cove Feeder 85S-401 2 This Wreck Cove feeder finished the year with a CKAIDI result of 20.91 versus the target of 3 <16.54 and finished in the top 5 percent o...

AI summary The Wreck Cove Feeder 85S-401 underperformed its CKAIDI target (20.91 vs. <16.54), ranking in the top 5% of worst performers in 2025. Despite this, reliability improved by 56% and 39% for outage duration and frequency compared to 2018-2022. The feeder serves 2,266 customers in challenging terrain with frequent extreme weather, and 152 outages occurred, including 11 during Major/Extreme Events. Over 45 km of distribution line remains off-road, complicating maintenance.

pacted a single customer 18 • 33 outages impacted between 2 and 100 customers 19 • 26 outages impacted between 101 and 1,000 customers 20 • 6 outages impacted over 1,000 customers 21 On November 23, 2025 a full outage affected all the cust...

AI summary The text details multiple power outages in 2025, including a 2.85-hour transmission-related outage at Wreck Cove Hydro Generating Station and a 1.4-hour tree-related outage affecting 2,155 customers. It highlights NSP's restoration efforts and the impact of infrastructure accessibility on outage duration. Extreme weather conditions are mentioned as a potential factor.

e feeder. 4 Had this outage occurred in winter, in a less accessible off-road location, restoration time would 5 have likely been a minimum of four hours. 6 Extreme Weather Conditions 7 The area fed by 85S-401 is rugged and exposed, runnin...

AI summary The text discusses the challenges faced by NS Power in restoring power on feeder 85S-401 due to extreme weather conditions in the Cape Breton Highlands, including harsh winter conditions, inaccessible locations, and heavy snowfall, which could significantly delay restoration times.

2025 Annual Performance Standards Report Non-Confidential 1 Figure 38 – Emergency Huts between North and French Mountain along 85S-401 2 3 DATE FILED: March 31, 2026 Page 64 of 115 2025 Annual Performance Standards Report Non-Confidential...

AI summary Nova Scotia Power (NSP) has invested $10 million since 2012 to improve reliability on feeder 85S-401, serving 2,266 customers. CKAIDI (Circuit Average Interruption Duration Index) metrics show a 56% improvement in outage duration between 2018-2022 and 2024-2025, demonstrating progress despite challenging winter conditions and terrain.

nce Improvement 2018-2022 Avg 2024-2025 Avg Percent Improvement CKAIDI 45.44 19.96 56.07 11 12 Figure 41 compares the average feeder performance for CKAIDI between 2018 and 2022 against 13 2024 and 2025. There is significant improvement in...

AI summary The document highlights a 56% reduction in CKAIDI (Circuit Average Interruption Duration Index) for feeder 85S-401 between 2018-2022 and 2024-2025, attributed to reliability investments and vegetation management. NS Power invested over $10M in reliability projects since 2012, with $483K spent on tree trimming in 2025 to reduce outages. Challenges remain due to terrain complexity and off-right-of-way tree risks.

ntelligence and automation logic. This enables the devices to detect 17 faults, isolate affected segments, and restore service to unaffected areas with minimal 18 human intervention. 19 NS Power believes these grid modernization investment...

AI summary NS Power proposes grid modernization investments on feeder 85S-401, including FLISR devices to automate fault detection and restoration, reducing outage durations and manual patrols. They also plan Bring-to-Roadside projects to improve infrastructure accessibility and reliability in remote areas, with $1.5M allocated for FLISR implementation by 2026.

lt location, safer and more efficient 8 restoration activities, and improved overall reliability for customers served by remote portions 9 of the feeder. 10 Wreck Cove Bring-To-Roadside 11 The Wreck Cove Bring-to-Roadside project involves...

AI summary The document outlines two infrastructure projects by Nova Scotia Power (NSP): the Wreck Cove Bring-to-Roadside project, which relocates distribution lines to improve reliability and safety for remote customers, and the Pleasant Bay Road Widening project, which coordinates with Parks Canada to relocate infrastructure during road expansion. Both aim to enhance grid efficiency and reliability.

Page 71 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 45 - 85S-401 Reliability Investments

AI summary The 2025 Annual Performance Standards Report includes Figure 45, titled '85S-401 Reliability Investments,' which likely details infrastructure or system reliability initiatives under Nova Scotia's regulatory framework. The document focuses on performance metrics related to grid reliability and investment planning.

Page 73 of 115 2025 Annual Performance Standards Report Non-Confidential 1 NS Power recognizes that improving the performance of L-5532 is essential to providing reliable 2 service to customers supplied by this transmission line. By replac...

AI summary NS Power highlights infrastructure upgrades on L-5532 to reduce equipment failures and improve reliability. The Caledonia Feeder 57W-402 showed improved outage frequency but missed targets, requiring further work. The feeder serves 336 rural customers and experienced 19 outages in 2025, including events on Major/Extreme Event days.

vents in 2025, three of which occurred on Major or 20 Extreme Event days. Four events were Planned Outages. Of the remaining 12 events, four outages 21 events impacted all customers on the feeder. 22 The details of the 19 outages are as fo...

AI summary The 2025 Annual Performance Standards Report details 19 outages, including 3 on Major/Extreme Event days, 4 Planned Outages, and 12 impacting varying numbers of customers. Four full feeder outages are described, caused by tree contact, vehicle accidents, and lightning, with durations ranging from 2.5 minutes to 4.79 hours.

area igniting trees which subsequently contacted the transmission line. The 16 transmission line was back in service 2.5 minutes later, resulting in a brief outage for 17 customers. 18 • November 12 – A Loss of Supply event caused a 7.19-h...

AI summary The report details four outage events on feeder 57W-402 in 2025, including a tree-related transmission line failure and a substation fault causing a 7.19-hour outage. Loss of supply events accounted for 84% of the CKAIFI result, highlighting challenges in predicting and mitigating diverse underlying causes of reliability issues.

lenge this poses for anticipating and mitigating them in advance. 8 9 Figure 46 - 57W-402 CKAIFI Contribution by Year 57W-402 CKAIFI Contribution by Year 2020 4.00 1.78 2021 2.00 2022 2.00 2023 7.98 2024 5.00 2025 1.00 3.00 0 1 2 3 4 5 6 7...

AI summary The text highlights that Loss of Supply outages account for 84% of CKAIFI (Circuit Average Interruption Frequency Index) for the 57W-402 feeder over six years. It notes improvements in CKAIFI over three years but emphasizes that a Motor Vehicle Accident in 2025 caused the feeder to exceed the threshold. The Distribution Reliability Investment Plan for 57W-402 is referenced.

al $5.5 million in on-going and planned projects. These 18 transmission actions are expected to have the greatest impact on overall outage performance for 19 customers served by this feeder. 20 DATE FILED: March 31, 2026 Page 77 of 115 202...

AI summary The 2025 Annual Performance Standards Report highlights improvements in outage performance for the Middlefield Feeder 91W-411, including a 34% reduction in outage frequency since 2024. The feeder serves 1,268 rural customers and achieved a CKAIFI of 4.71, above the threshold of <4.21, despite ongoing infrastructure challenges.

d has multiple branch lines off the main roads. It is extremely rural serving many 12 cottages and remote homes. 13 The 91W Middlefield substation is served by the 69 kV transmission line L-5532. 14 Feeder 91W-411 experienced 83 outage eve...

AI summary The 91W Middlefield substation, serving a rural area with remote homes, experienced 83 outages in 2025, including 19 on Major/Extreme Event days. 4 outages affected all customers, while others were due to planned events, foreign interference, customer-owned equipment, and vegetation management. NS Power collaborated with customers on equipment-related issues.

, 2026 Page 79 of 115 2025 Annual Performance Standards Report Non-Confidential 1 the customer to prevent further outages and coordinate recloser and protection settings. 2 With these updates complete, this scenario is not expected to reoc...

AI summary The 2025 Annual Performance Standards Report details three outage events: a 1.5-hour outage due to tree contact and conductor failure on L-5532, a 2.5-minute lightning-induced trip on the same line, and a 7.19-hour outage caused by a failed high-side lead at a substation. Each event involved specific resolution actions, including conductor replacement and fault location.

26 Page 80 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 50 – 91W-411 Customer Outage Frequency by Cause - 2025 91W-411 Customer Outage Frequency by Cause - 2025 0.69 1.00 Adverse Weather Foreign Interference Lo...

AI summary The 2025 report identifies loss of supply, foreign interference, and tree contacts as primary outage causes on Feeder 91W-411, linked to transmission line L-5532 issues affecting multiple feeders. Reliability analysis highlights recurring supply loss events tied to substation or transmission failures.

Non-Confidential 1 Figure 51 – 91W-411 Feeder Performance 2020-2025 91W-411 2020 2021 2022 2023 2024 2025 CKAIFI 4.82 4.70 5.15 8.87 8.63 4.71 2 Figure 51 shows the annual CKAIFI and CKAIDI performance of Feeder 91W-411. 3 Figure 52 - 91W-...

AI summary Figure 51 and 52 analyze Feeder 91W-411's performance (2020-2025), showing CKAIFI trends and outage causes. Loss of Supply accounts for 65% of CKAIFI, with vegetation management highlighted as a reliability action plan component.

Page 82 of 115 2025 Annual Performance Standards Report Non-Confidential 1 and proactive reliability investments in upgrades to larger, stronger poles, and protective 2 equipment additions. 3 4 91W-411 Investment and Reliability Action Pla...

AI summary NS Power's 2025 report details $2.75M in reliability upgrades for feeder 91W-411, including vegetation management reducing tree-related CKAIFI by 38% (from 1.11 to 0.69). Investments include pole replacements, TripSavers, and a 2026 3-phase line upgrade. Performance shows improved outage reduction through targeted infrastructure work.

along Extension Labelle Road Equipment Install two 2025 $41,240 Completed Installation TripSavers Targeted Pole 2025 Equipment $74,764 Completed Replacements Replacements Targeted Insulator 2026 Equipment $21,000 Planned Replacements Repla...

AI summary The document outlines infrastructure projects by NSP, including equipment installations and vegetation management, with investments totaling $2.75 million since 2021. Projects like TripSavers installation and pole replacements are completed or planned, while vegetation management spans 150 areas. The 2025 Annual Performance Standards Report includes Section 4.0 on customer-level reliability data.

Page 85 of 115 2025 Annual Performance Standards Report Non-Confidential 1 4.0 CUSTOMER-LEVEL RELIABILITY DATA 2 In its order on the five-year review of Performance Standards on April 7, 2022. The Board stated 3 the following: 4 5 The Boar...

AI summary The NSUARB ordered NS Power to report on progress developing customer-level reliability metrics via ADMS in its 2022 Performance Standards Review. NS Power outlines six project stages, currently producing operational values for CELID-8 and CEMI-4/5 metrics, which track long-duration and multiple interruptions.

Page 86 of 115 2025 Annual Performance Standards Report Non-Confidential 1 hours). CEMI represents the percentage of customers experiencing a volume of sustained 2 interruptions greater or equal to a threshold (in this case 4 and 5 interru...

AI summary The 2025 Annual Performance Standards Report highlights a decline in CEMI-4 and CEMI-5 metrics (customers experiencing multiple interruptions) compared to previous years and the five-year average, excluding major, extreme, and planned events. Figures 55 and 56 illustrate this trend, showing the lowest values in 2025.

11.1% 11.4% 10.7% 10.0% 8.9% 9% 8.0% 7.5% 6.0% 4.8% 4.0% 2.0% 0.0% 2020 2021 2022 2023 2024 2025 PERFORMANCE STANDARDS PS - 5 YR AVG (2021-2025) 3 4 Figure 57 - CEMI-5 Annually (2020 -2025) shows the 4.8 percent value for CEMI-5 in 2025, 5...

AI summary The 2025 Annual Performance Standards Report highlights improvements in customer interruption metrics, with CEMI-5 at 4.8% (below the 2021-2025 five-year average of 28.1%) and CELID-8 at 23.6% (below the five-year average of 28.1%). These metrics reflect reduced service interruptions and enhanced reliability performance.

ance Standards Report Non-Confidential 1 Figure 59 - Customers Experiencing Long Interruption Duration (CELID)-8 (2020- 2 2025) CELID-8 35.0% 32.3% 31.2% 30.0% 28.5% 24.7% 24.7% 28% 23.6% 25.0% 20.0% 15.0% 10.0% 5.0% 0.0% 2020 2021 2022 20...

AI summary The document presents CELID-8 trends (2020-2025), showing 2025 as the lowest value. NS Power updated analysis on Electricity Canada utilities, finding no changes in reliability metric usage since 2023. Figure 60 summarizes metric adoption by utilities, with some not using CEMI, CELID, or CEMM.

arch 31, 2026 Page 91 of 115 2025 Annual Performance Standards Report Non-Confidential 1 This analysis included 32 Electricity Canada member utilities. Of the 32 utilities reviewed, only 2 two currently measure customer-level reliability m...

AI summary NS Power discusses challenges in benchmarking customer-level reliability metrics (CEMI-4, CELID-8) against utilities like BC Hydro and Manitoba Hydro, noting differences in operating conditions and limited comparator data. The report highlights the need for understanding metric measurement practices across jurisdictions and NS Power's commitment to annual reporting.

f 115 2025 Annual Performance Standards Report Non-Confidential 1 5.0 MAJOR EVENT DAYS AND EXTREME EVENTS DAYS IN 2025 2 NS Power experienced 3 event days in 2025: 1 EED and 2 MEDs. 3 4 The IEEE 1366-2012 Standard methodology defines a Maj...

AI summary NS Power reported 3 event days in 2025 (1 EED, 2 MEDs) under IEEE 1366-2012 standards, defined by SAIDI and CHI thresholds. SEDs, MEDs, and EEDs use beta values of 2.0, 2.5, and 3.5 respectively, with CHI thresholds of 95,651; 237,489; and 1,464,050 for each event type.

ards. 25 26 In the sections below NS Power summarizes each of the MEDs and EEDs experienced in 2025 27 and outlines the specific information requested by the NSEB. The Company’s four territories 9 M07387, Exhibit N-23, LEI Response to Unde...

AI summary NS Power reports on a major event day (MED) on December 3, 2025, caused by a nor'easter leading to over 56,000 customers losing power due to heavy snow and tree-line contacts. The report includes performance metrics and references Appendix N for comparative event data.

CHI SAIFI SAIDI December 3, 2025 56,867 237,934 0.10 0.43 8 9 Restoration Profile and Restoration Challenges 10 During this storm day, travel conditions deteriorated due to accumulating snow further 11 complicating access to outage locatio...

AI summary The text details a storm on December 3, 2025, causing outages in Nova Scotia, with peak wind gusts up to 98 km/h in Cape Breton. Despite challenging conditions, 100% of affected customers were restored within 48 hours, highlighting restoration efforts and performance metrics (SAIFI, SAIDI). Regional gust data and outage timelines are emphasized.

Page 96 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 65 - December 3, 2025 Customer Outage Profile December 3, 2025 Customer Outage Profile 35000 26,749 30000 Peak at 09:30 - Dec 3, 2025 25000 Total Customers O...

AI summary The figure illustrates a peak of 26,749 customers experiencing outages on December 3, 2025, with the highest number at 09:30. The outage lasted 48 hours, fully restored by 04:02 on December 5, affecting regions including West, Metro, Northeast, Cape Breton, and Provincial Customers.

22 second) Service Level (Percentage Answered 96.98 in 45 Seconds or Less) 2 3 Crew Information 4 NS Power mobilized over 300 field personnel to restore power for the December 3, 2025 MED. 5 Figure 67 shows the number of PLTs and Forestry...

AI summary NS Power mobilized over 300 field personnel, including Powerline Technicians, external technicians, and Forestry Workers, across regions like Cape Breton, Metro, Northeast, and West to restore power during the December 3, 2025 Major Event Day (MED). Figure 67 details resource deployment by region.

Northeast 8 West 34 Cape Breton 3 Metro 0 Transmission Line PLTs & Operators Northeast 3 West 0 Total 282 2 3 DATE FILED: March 31, 2026 Page 99 of 115 2025 Annual Performance Standards Report Non-Confidential 1 5.2 Extreme Event Day and M...

AI summary A severe wind and rain event from December 19-20, 2025, caused widespread power outages and restoration challenges in Nova Scotia. The report details performance metrics for this Extreme Event Day (EED) and Major Event Day (MED), including wind gusts up to 115 km/h and heavy rainfall. Environment Canada issued warnings, and NS Power tracked restoration efforts.

20, 2025 event are summarized below. 12 Figure 68 – December 19-20 Performance Standards Metrics Metric Target Result Outcome Percentage 78.38 (December 19) December 19 – 98.84 Achieved of Customers 91.98 (December 20) December 20 – 99.45...

AI summary The 2025 Annual Performance Standards Report confirms NS Power met all metrics for the December 19-20 EED/MED event, including customer restoration rates, EOC notification timing, outage call resolution, and polite disconnects. SAIDI/SAIFI results for the storm are detailed in Figure 69.

SAIDI and SAIFI 5 The SAIDI and SAIFI results for the December 19-20, 2025 EED/MED are set out in Figure 69. 6 Figure 69 – SAIDI and SAIFI Values for December 19-20, 2025 EED/MED Date CI CHI SAIFI SAIDI December 19-20, 2025 270,411 2,129,9...

AI summary The document presents SAIDI and SAIFI metrics for the December 19-20, 2025 EED/MED event, highlighting 270,411 customer interruptions and 3.85 hours of average interruption duration. High winds, saturated soil, and flooding caused widespread outages, complicating restoration efforts due to flooded roads and inaccessible locations.

25 Peak Gusts by Region Region Peak Gust (km/h) Valley 96 South Shore 83 Northern 74 Northeast 104 Metro 100 Eastern Shore 115 CB West 96 CB East 91 3 4 Restoration began at the onset of storm-related outages and continued through December...

AI summary The document details storm-related outages in Nova Scotia, with peak gusts up to 115 km/h on the Eastern Shore, and restoration efforts lasting until December 23, 2025. A customer outage profile shows a peak of 136,263 outages at 01:30 on December 20, 2025.

ntial HVCA Satisfied (Self Service) 50,172 Agent Answered (Voice) 12,100 Percentage HVCA Satisfied 79.70% # of Polite Disconnects 7 Average Speed of Answer (in 104 second) Service Level (Percentage Answered 93.32% in 45 Seconds or Less) 1...

AI summary The document outlines NS Power's customer service performance (HVCA satisfaction, call handling metrics) and details mobilization of over 400 field personnel to restore power during the December 19-20, 2025 EED/MED event, referencing Figure 73 for crew deployment data.

Page 105 of 115 2025 Annual Performance Standards Report Non-Confidential 1 6.0 PLANNED OUTAGES ON NS POWER’S SYSTEM 2 With respect to planned outages, the NSUARB directed the following in its 2017 Annual 3 Performance Standards Report dec...

AI summary NS Power discusses planned outages required for reliability work, noting the NSUARB's 2017 directive for annual reporting on outage reductions. The report emphasizes minimizing customer impact through load transfer and energized work where safe, while acknowledging the necessity of planned outages for reliability upgrades.

24 transmission lines or substations; 25 11 M08574, NS Power 2017 Annual Performance Standards Report, NSUARB Decision Letter, May 1, 2018, page 5. DATE FILED: March 31, 2026 Page 106 of 115 2025 Annual Performance Standards Report Non-Con...

AI summary The 2025 Annual Performance Standards Report outlines measures to enhance outage management, including sectionalizing customers, deploying multiple crews, and installing load pick-up jumpers or circuit switchers to minimize outage durations. These actions aim to improve system reliability and service restoration efficiency.

they impacted 244 customers as shown in Figure 75. 26 27 Figure 76 provides the planned outage SAIDI value per month and Figure 77 shows the planned 28 SAIFI values by month for 2024 and 2025. 29 DATE FILED: March 31, 2026 Page 107 of 115...

AI summary The text references figures comparing 2024 and 2025 planned outage metrics, including SAIDI (System Average Interruption Duration Index) and SAIFI (System Average Interruption Frequency Index) values, with 2025 showing increased outage duration and slightly higher SAIDI compared to 2024.

2024 0.05 - Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 7 DATE FILED: March 31, 2026 Page 108 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 77 – 2024 and 2025 Planned Outage SAIFI by Month Planned Outage SAI...

AI summary The 2025 Annual Performance Standards Report indicates an increase in planned outages compared to 2024, but with fewer customer impacts. Most outages were for reliability and capital upgrades, with 130 affecting one customer and 686 impacting 2–10 customers. SAIFI metrics and monthly outage breakdowns are detailed in figures.

Page 109 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 78 – Planned Outages by Month Planned Outages by Month 250 200 150 2025 100 2024 50 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2 3 Figure 79 – Planne...

AI summary The 2025 Annual Performance Standards Report includes figures showing planned outages by month and type (e.g., customer requested, tree trimming, transmission reliability), with notes that all outage categories impact system reliability. Reliability was previously labeled as maintenance.

5 2025 Annual Performance Standards Report Non-Confidential 1 Figure 80 – Planned Outage Duration by Outage Type Planned Outage Duration (hours) by Outage Type 3000 2500 2000 1500 2025 2024 1000 500 0 Capital Customer Switching Reliability...

AI summary The 2025 Annual Performance Standards Report highlights NS Power's focus on reliability and resiliency through planned outages, with 56% of events related to reliability upgrades and 18% to capital improvements. The report also outlines 2026 performance targets, including a SAIDI target of ≤4.29, for NSEB approval.

within 48 hours Outage Report required for events impacting Outage Report greater than 30,000 customers. A minimum of 70% of calls shall be answered Regular Business Call Answer within 30 seconds at NS Power Customer Care Rate Centre No mo...

AI summary The document outlines NS Power's 2025 Annual Performance Standards, including outage reporting requirements for events affecting over 30,000 customers, customer service metrics (e.g., 70% of calls answered within 30 seconds), billing accuracy targets, outage notification protocols, and service installation timelines for various connection types.

Page 113 of 115 2025 Annual Performance Standards Report Non-Confidential 1 8.0 CONCLUSION

AI summary The conclusion section of the 2025 Annual Performance Standards Report summarizes key performance metrics, compliance with regulatory standards, and outcomes related to service reliability and operational efficiency.

2 The 2025 performance standards results demonstrate that NS Power’s plans to improve reliability, 3 customer experience and adverse weather response are working. Structuring the business to focus 4 on Reliability with the creation of a Re...

AI summary NS Power's 2025 performance shows improved reliability through vegetation management and equipment replacement, reducing outages by 20% from tree contacts and equipment failures. Adverse weather standards were met, but a cyber event in April 2025 impacted customer service metrics, though core operations remained unaffected. NS Power remains on track to meet reliability targets while balancing cost efficiency.

77.37 60.64 86,472 Year-to-Date 60.64 60.64 1,048,510 2025 Performance Standards Report Appendix B Page 1 of 1 Appendix B Customer Bills Estimated Supporting Documentation NS Power 2025 Results for Customer Bills Estimated Percentage Month...

AI summary Appendix B presents NS Power's 2025 monthly data on customer bills produced versus estimated, with YTD estimates at 37.8%. Appendix C discusses outage communication system uptime for 2025, focusing on ETRS (Estimated Time of Restoration) delivery and operational system availability.

detail of the availability of the operational systems which process outage calls and manage outage map functionality. Figure 1 shows uptime information for the outage operational systems for 2025.

AI summary The text references details about the availability of operational systems handling outage calls and outage map functionality, with Figure 1 illustrating uptime data for these systems in 2025.

Figure 1 - Outage Operational System Uptime and Comments Application 2025 Uptime Comments ADMS 99.0% ADMS downtime in 2025 was primarily related to planned maintenance activities to restore the Backup Control Centre (BCC) site following im...

AI summary The document outlines the 2025 uptime performance of outage-related systems, noting ADMS downtime due to planned maintenance and hardware failures, NSP Outage Map interruptions from ADMS file transfers, BCP Outage Site full availability, HVCA with 18 hours of downtime, and 100% social media uptime for outage updates.

Facebook, Instagram, etc.) were available with NS Power outage updates throughout 2025. The data for the Outage Communication metric is provided by the NSPI Outage Management System and uptime reporting from the NSPI Outage Map website. Th...

AI summary The text discusses NS Power's use of social media for outage updates in 2025 and the data sources for the Outage Communication metric, including the NSPI Outage Management System and NSPI Outage Map website. The metric accounts for website unavailability.

2025 Performance Standards Report Appendix E Page 4 of 5 3. NS Power Website – December 19, 2025 4. Social Media – December 19, 2025 Twitter Facebook 2025 Performance Standards Report Appendix E Page 5 of 5 2025 Performance Standards Repor...

AI summary The 2025 Performance Standards Report includes data on outage call handling during Major Event Days (MED), with 93.32% of calls answered within 45 seconds during Dec 19-20, 2025. Data sources are CISCO Unified Intelligence Center (CUIC) and High-Volume Call Answer (HVCA) systems, excluding regular business and abandoned calls.

2.19 5.16 2023 2.18 5.21 2024 1.97 5.26 2025 1.57 4.79 Customer Interruption, Customer Hours of Interruption and Customer Count 2025 Month CI CH Customer Count Jan 92,717 300,603 551,000 Feb 89,012 283,103 551,401 Mar 52,300 119,089 552,02...

AI summary The text provides monthly data on customer interruptions (CI), customer hours of interruption (CH), and customer count for 2025, including totals and averages, as part of the 2025 Performance Standards Report.

32 220,458 552,449 Total 869,188 2,645,492 2025 Performance Standards Report Appendix H Page 2 of 4 Monthly SAIDI 2023-2025 SAIDI (cumulative by month) Month 2023 2024 2025 Jan 0.58 0.50 0.55 Feb 1.03 1.73 1.06 Mar 1.27 2.36 1.27 Apr 1.56...

AI summary The document presents SAIDI metrics for 2023-2025, showing monthly and annual outage durations, with a slight decrease in 2025 compared to 2024.

5 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 5 Year Trend 2024 2025 2025 All Events SAIDI Results 5 Year Average Month 2024 2025 (2020 – 2024) Jan 0.51 0.60 1.45 Feb 1.77 1.25 3.63 Mar 2.44 1.52 4.07 Apr 3.03 1.94 4.59 May 3.30 2.50...

AI summary The document presents SAIDI and SAIFI results for 2025, showing increased interruption durations and frequencies compared to 2024 and the 5-year average, indicating potential reliability issues in the electricity system.

0.5 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 5 Year Trend 2024 2025 2025 All Events SAIFI Results 5 Year Average Month 2024 2025 (2010 – 2024) Jan 0.23 0.25 0.41 Feb 0.66 0.48 0.95 Mar 0.92 0.64 1.15 Apr 1.16 0.83 1.37 May 1.35 1....

AI summary The text presents monthly SAIFI (System Average Interruption Frequency Index) results for 2024 and 2025, comparing them to a 5-year average (2010–2024). Data shows increasing interruption frequencies in 2025 relative to 2024, with December 2025 showing the highest SAIFI value (2.92) compared to the 5-year average of 3.76. The context is part of a 2025 Performance Standards Report.

2025 Performance Standards Report Appendix I Page 1 of 10 EXCLUSIONS MED/EXT Planned 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAID...

AI summary The 2025 Performance Standards Report Appendix I presents statistical data on exclusion thresholds for MED/EXT planned events, including Circuit Average Interruption Frequency Index (CKAIFI) and Circuit Average Interruption Duration Index (CKAIDI) metrics from 2019 to 2025, with values for average, standard deviation, and average + 2 standard deviations.

2.22 1.85 2.06 1.95 1.99 1.87 1.46 5.77 3.88 4.87 5.19 4.80 5.59 4.73

AI summary The text presents a series of numerical values, likely representing performance metrics such as SAIFI or SAIDI, which are critical indicators for assessing electrical system reliability and service quality in Nova Scotia.

2025 Performance Standards Report Appendix I Page 2 of 10 EXCLUSIONS MED/EXT Planned 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAID...

AI summary The table presents statistical thresholds (average, standard deviation, and average + 2 standard deviations) for CKAIFI and CKAIDI metrics from 2019 to 2025, excluding planned outages (MED/EXT). These metrics track service interruption frequency and duration, reflecting performance standards for reliability.

2.22 1.85 2.06 1.95 1.99 1.87 1.46 5.77 3.88 4.87 5.19 4.80 5.59 4.73

AI summary The text presents a series of numerical values, likely representing performance metrics such as SAIFI or SAIDI, which are critical indicators for assessing electrical system reliability and service quality in Nova Scotia.

Source Feeder 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAIDI 2025 CKAIDI 113H-433 0.30 0.33 0.75 2.41 6.21 0.18 1.50 0.32 0.39 2.1...

AI summary A table presenting Circuit Average Interruption Frequency Index (CKAIFI) and Circuit Average Interruption Duration Index (CKAIDI) metrics for various power feeders from 2019 to 2025, showing fluctuating values over time.

2025 Performance Standards Report Appendix I Page 3 of 10 EXCLUSIONS MED/EXT Planned 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAID...

AI summary The document presents statistical data on planned outage performance standards for Major/Extreme Events (MED/EXT) from 2019-2025, including Circuit Average Interruption Frequency Index (CKAIFI) and Duration Index (CKAIDI) metrics with averages, standard deviations, and 2-standard-deviation thresholds.

2.22 1.85 2.06 1.95 1.99 1.87 1.46 5.77 3.88 4.87 5.19 4.80 5.59 4.73

AI summary The text presents a series of numerical values, likely representing performance metrics such as SAIFI or SAIDI, which are critical indicators for assessing electrical system reliability and service quality in Nova Scotia.

Source Feeder 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAIDI 2025 CKAIDI 143H-412 0.00 0.00 143H-413 0.00 0.01 15N-202 0.11 0.00 1...

AI summary The table presents Circuit Average Interruption Frequency Index (CKAIFI) and Circuit Average Interruption Duration Index (CKAIDI) metrics for multiple feeders from 2019 to 2025, showing variations in service reliability and outage performance across different circuits.

0.83 6.65 2.56 3.75 0.24 1N-404 0.03 0.05 2.03 0.11 1.47 0.69 0.11 0.19 0.24 2.90 3.65 1.66 1.13 0.47 1N-405 2.34 3.19 2.84 1.74 4.47 2.76 0.73 4.78 3.60 4.39 5.94 4.64 5.11 1.51 1N-421 1.04 2.30 3.08 2.08 2.02 2.31 1.14 0.24 6.64 6.72 5.0...

AI summary The document presents performance metrics for power interruption frequency (CKAIFI) and duration (CKAIDI) from 2019 to 2025, including statistical measures like averages and standard deviations. It references exclusions related to Major Event/Extreme Event Days (MED/EXT) and appears to be part of a regulatory performance standards report.

2.22 1.85 2.06 1.95 1.99 1.87 1.46 5.77 3.88 4.87 5.19 4.80 5.59 4.73

AI summary The text presents a series of numerical values, likely representing performance metrics such as SAIFI or SAIDI, which are critical indicators for assessing electrical system reliability and service quality in Nova Scotia.

Source Feeder 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAIDI 2025 CKAIDI 1V-442 1.00 0.00 0.00 0.00 2.00 0.00 0.05 0.00 0.00 0.00...

AI summary The table presents Circuit Average Interruption Frequency Index (CKAIFI) and Duration Index (CKAIDI) data for multiple feeders from 2019 to 2025, showing fluctuations in service interruption metrics over time.

3.81 10.45 6.22 25W-301 2.87 0.34 8.80 1.38 1.43 2.04 2.24 11.24 5.51 15.92 1.70 48.81 7.70 6.58 25W-302 1.21 4.14 7.02 0.48 1.48 4.40 4.23 4.60 11.17 11.44 1.17 3.31 17.35 13.01 25W-303 4.12 2.14 5.06 0.23 1.02 3.06 0.14 6.03 3.74 7.38 0....

AI summary The text appears to be a table of numerical data from the 2025 Performance Standards Report Appendix I, likely representing performance metrics for Nova Scotia Power's utility services. The data may relate to system reliability indices, customer interruptions, or operational performance benchmarks.

2025 Performance Standards Report Appendix I Page 5 of 10 EXCLUSIONS MED/EXT Planned 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAID...

AI summary The document excludes Major/Extreme Event Days (MED/EXT) from performance standards, presenting statistical data on interruptions from 2019 to 2025, including averages, standard deviations, and averages plus two standard deviations for CKAIFI and CKAIDI metrics.

2.22 1.85 2.06 1.95 1.99 1.87 1.46 5.77 3.88 4.87 5.19 4.80 5.59 4.73

AI summary The text presents a series of numerical values, likely representing performance metrics such as SAIFI or SAIDI, which are critical indicators for assessing electrical system reliability and service quality in Nova Scotia.

Source Feeder 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAIDI 2025 CKAIDI 2C-402 9.03 5.04 8.19 4.80 1.34 2.22 3.11 16.27 22.01 44....

AI summary The table presents Circuit Average Interruption Frequency Index (CKAIFI) and Circuit Average Interruption Duration Index (CKAIDI) data for multiple electrical feeders from 2019 to 2025, showing metrics for service interruptions over time.

2025 Performance Standards Report Appendix I Page 6 of 10 EXCLUSIONS MED/EXT Planned 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAID...

AI summary The table presents statistical performance metrics (CKAIFI and CKAIDI) for exclusion periods (MED/EXT) from 2019 to 2025, showing averages, standard deviations, and 'Avg + 2 St. Dev' thresholds. Data reflects trends in circuit-level interruption frequency and duration over time.

2.22 1.85 2.06 1.95 1.99 1.87 1.46 5.77 3.88 4.87 5.19 4.80 5.59 4.73

AI summary The text presents a series of numerical values, likely representing performance metrics such as SAIFI or SAIDI, which are critical indicators for assessing electrical system reliability and service quality in Nova Scotia.

Source Feeder 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAIDI 2025 CKAIDI 48H-303 1.01 3.14 2.01 1.02 1.41 2.28 1.01 0.07 3.49 6.51...

AI summary The table presents Circuit Average Interruption Frequency Index (CKAIFI) and Circuit Average Interruption Duration Index (CKAIDI) values for various feeders from 2019 to 2025, showing fluctuations in service reliability metrics across different years.

71 2.59 0.74 3.98 3.86 14.05 2.33 4.68 12.63 1.78 11.17 14.51 4C-432 1.00 0.54 2.80 1.52 2.61 2.51 1.63 1.26 1.21 6.02 4.70 11.62 6.93 6.64 4C-441 4.21 3.07 4.60 4.45 3.69 0.57 2.88 6.90 7.23 22.24 15.14 14.48 2.74 9.93 4C-442 2.00 0.00 1....

AI summary The text presents numerical data in a table format, likely representing performance metrics or statistical outcomes related to regulatory proceedings. The values may correspond to operational indices, service interruptions, or other quantifiable measures, though thematic context is minimal due to the absence of explanatory text.

1.02 1.04 2.17 0.08 0.28 0.27 1.07 0.32 0.12 55N-204 0.07 1.16 0.15 0.17 2.06 1.04 1.05 0.21 0.15 0.13 0.83 1.28 6.60 0.14 55V-313 0.78 2.34 1.64 2.24 1.67 2.45 0.82 1.89 14.70 2.88 8.85 1.24 2.52 1.88 55V-314 2.20 1.26 1.90 2.49 2.02 2.83...

AI summary The document presents statistical data on performance standards for CKAIFI and CKAIDI metrics from 2019 to 2025, excluding MED/EXT events. It includes averages, standard deviations, and thresholds for circuit-level service reliability, reflecting trends in interruption frequency and duration.

2.22 1.85 2.06 1.95 1.99 1.87 1.46 5.77 3.88 4.87 5.19 4.80 5.59 4.73

AI summary The text presents a series of numerical values, likely representing performance metrics such as SAIFI or SAIDI, which are critical indicators for assessing electrical system reliability and service quality in Nova Scotia.

Source Feeder 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAIDI 2025 CKAIDI 55V-322 0.94 1.60 1.37 0.35 1.06 3.29 1.42 1.94 3.68 2.02...

AI summary The text presents a table of Circuit Average Interruption Frequency Index (CKAIFI) and Duration Index (CKAIDI) values for various feeders from 2019 to 2025, showing metrics related to power system reliability and outage performance over time.

7.25 38.28 6N-301 1.10 1.03 0.23 2.19 3.23 3.01 1.08 3.48 0.35 0.39 1.43 20.97 4.75 1.35 6N-302 1.01 0.17 0.43 1.05 7.29 3.02 1.01 3.08 0.56 0.52 0.20 30.85 5.69 1.27 6S-221 1.22 0.12 0.00 0.15 3.92 0.11 0.01 0.85 6S-223 0.00 0.00 2025 Per...

AI summary The text presents statistical data from a performance standards report, focusing on exclusion criteria for Major/Extreme Event Days (MED/EXT) and metrics for Circuit Average Interruption Frequency Index (CKAIFI) and Duration Index (CKAIDI) across 2019–2025, including averages, standard deviations, and thresholds.

2.22 1.85 2.06 1.95 1.99 1.87 1.46 5.77 3.88 4.87 5.19 4.80 5.59 4.73

AI summary The text presents a series of numerical values, likely representing performance metrics such as SAIFI or SAIDI, which are critical indicators for assessing electrical system reliability and service quality in Nova Scotia.

Source Feeder 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAIDI 2025 CKAIDI 6S-224 0.00 1.00 0.00 0.01 2.94 0.00 6S-225 2.16 0.01 1.0...

AI summary The table presents Circuit Average Interruption Frequency Index (CKAIFI) and Circuit Average Interruption Duration Index (CKAIDI) metrics for multiple feeders (e.g., 6S-224, 6W-201) across 2019–2025, showing variations in service reliability and outage performance over time.

0.00 0.00 7N-301 3.60 0.34 0.16 1.17 2.65 3.05 2.10 14.03 0.36 0.32 2.13 6.43 9.71 14.51 7N-302 1.16 2.07 1.12 0.56 0.27 3.03 1.08 3.46 3.87 0.32 4.52 0.52 4.97 4.72 7W-202 0.00 0.00 0.00 0.67 0.00 0.00 0.00 2.19 80W-301 0.32 0.61 1.94 4.3...

AI summary The text presents numerical data on power system performance metrics, including interruption frequency and duration indices, across various circuits. It reflects system reliability during different event days (e.g., Major Event Days, Extreme Event Days) and may relate to NS Power's operations and regulatory oversight.

2.22 1.85 2.06 1.95 1.99 1.87 1.46 5.77 3.88 4.87 5.19 4.80 5.59 4.73

AI summary The text presents a series of numerical values, likely representing performance metrics such as SAIFI or SAIDI, which are critical indicators for assessing electrical system reliability and service quality in Nova Scotia.

Source Feeder 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAIDI 2025 CKAIDI 81S-304 2.08 1.05 0.18 1.19 5.22 3.11 2.04 2.21 2.23 0.27...

AI summary The table presents Circuit Average Interruption Frequency Index (CKAIFI) and Circuit Average Interruption Duration Index (CKAIDI) values for multiple source feeders from 2019 to 2025, showing significant variation in outage frequency and duration across different infrastructure components, with notable spikes in 2023 and 2024.

54 0.00 3.88 0.07 89W-302 4.82 3.55 1.08 1.09 0.22 3.90 3.13 5.53 1.90 1.81 4.62 1.39 10.93 3.73 89W-303 2.77 4.60 0.69 1.15 1.24 2.56 0.56 6.06 9.06 1.05 5.07 3.72 7.82 4.25 2025 Performance Standards Report Appendix I Page 10 of 10 EXCLU...

AI summary The chunk presents statistical data on performance metrics (CKAIFI, CKAIDI) for planned exclusions related to Major/Extreme Event Days (MED/EXT) from 2019 to 2025, including averages and standard deviations, as part of a 2025 Performance Standards Report.

Source Feeder 2019 CKAIFI 2020 CKAIFI 2021 CKAIFI 2022 CKAIFI 2023 CKAIFI 2024 CKAIFI 2025 CKAIFI 2019 CKAIDI 2020 CKAIDI 2021 CKAIDI 2022 CKAIDI 2023 CKAIDI 2024 CKAIDI 2025 CKAIDI 89W-304 2.05 3.11 1.10 1.63 0.97 1.33 1.13 2.83 2.67 1.22...

AI summary A table presenting Circuit Average Interruption Frequency Index (CKAIFI) and Circuit Average Interruption Duration Index (CKAIDI) metrics for multiple feeders (e.g., 89W-304, 91W-411) across 2019-2025, showing fluctuations in service reliability performance.

3.10 1.05 9.96 0.04 6.92 2.42 10.05 10.75 6.84 L-4048 0.00 0.00 1.00 0.00 0.00 1.00 0.00 0.00 5.03 0.00 0.00 1.02 L-4049 1.98 1.01 0.01 1.13 1.07 0.37 0.30 2.67 2.86 0.03 0.84 4.01 0.68 0.35 2025 Performance Standards Report Appendix J Pag...

AI summary The text describes a Feeder Investment Map for the 85S-401 circuit, which serves 2,266 customers from the Wreck Cove substation. The map visualizes outage events in 2025 alongside reliability investments, using circles to represent outages and customer hours to indicate duration.

14.4 Service Point Events: 41 854.4 406.9 Customer Hours 11 11.1 16 of Interruption 1449.9 9.0 Average of CHI per 1265.2 8.3 Single Customer: 8.6 168.6 4162.7 2.6 107.9 # 4.4

AI summary The text presents metrics related to service interruptions, including 41 service point events, 406.9 customer hours of interruption, and averages of 8.6 hours per customer. Key performance indicators like SAIFI, SAIDI, and CHI are referenced, highlighting system reliability and interruption frequency/duration.

Customer Impact Wreck Cove BTR 1.43 - 11.10 26.3 11.10 - 29.81 25.8 Devices from FLISR 827.6 29.81 - 64.33 New Intellirupters

AI summary The text outlines customer impact metrics for Wreck Cove BTR, referencing FLISR devices and Intellirupters with numerical ranges (e.g., 1.43–11.10, 29.81–64.33). It appears to discuss system reliability improvements through advanced grid technologies.

85S-401.aprx Last revised by: Katie Chute Date revised: March 25th, 2026 2025 Performance Standards Report Appendix J Page 3 of 6 57W-402 INVESTMENT MAP The following map shows the feeder extents of 57W-402, a 25-kV circuit feeding 336 cus...

AI summary The document presents a map of the 57W-402 25-kV circuit feeding 336 customers from the Caledonia substation, overlaying 2025 outage events with reliability investment locations. Outages are visualized via circles scaled by customer impact, with call-out boxes showing total customer hours per event.

Work Depot: LIV 57W-402_2026.MXD Last revised by: Katie Chute Date revised: March 25th, 2026 2025 Performance Standards Report Appendix J Page 5 of 6 91W-411 INVESTMENT MAP The following map shows the feeder extents of 91W-411, a 25-kV cir...

AI summary The document presents a map of the 91W-411 circuit's 2025 outage events and reliability investments, visualizing customer impact through circle sizes and durations, alongside hatched rectangles for reliability projects and colored rectangles for vegetation management initiatives.

projects are depicted by colored rectangles. 2025 Performance Standards Report Appendix J Page 6 of 6 91W-411 : 2025 0 2 3 5 6 218.4 Kilometers 3.7 3.3 Customer Hours Service Point Events: 26 797.1 of Interruption 90.2 Average of CHI per S...

AI summary The text presents performance metrics from the 2025 Performance Standards Report, including 218.4 kilometers of infrastructure, 3.3 customer hours of interruption, 26 service point events, and an average of 6.2 CHI per customer. These data points relate to service reliability and outage management.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 1/2/2025 15N-402 04:00 05:57 117 1.95 1 Capital 1/2/2025 126H-311 09:32 09:57 24 652...

AI summary The table lists power outage events from January 2 to January 6, 2025, detailing feeder lines, interruption durations, customer hours affected, and root causes (e.g., switching, reliability, tree trimming). Metrics include duration in minutes, customer hours of interruption, and number of customers impacted per event.

Switching 1/5/2025 22V-313 22:33 22:44 10 85.50 500 Switching 1/6/2025 50V-402 02:40 05:32 171 1,993.49 698 Switching 1/6/2025 50V-402 02:40 03:59 78 2,265.03 1,733 Switching 1/6/2025 22N-402 13:14 13:47 33 34.90 63 Reliability 1/6/2025 22...

AI summary The text presents a table of events with dates, codes, durations, costs, and categories such as 'Switching,' 'Reliability,' 'Capital,' and 'Cap.' It includes timestamps, financial figures, and event classifications, likely related to utility operations and infrastructure management.

105 5.25 3 Capital 1/9/2025 77V-301 06:01 06:17 16 298.55 1,114 Capital 1/9/2025 88W-323 09:02 11:40 158 31.66 12 Reliability 1/9/2025 36V-303 09:59 11:57 118 3,550.91 1,808 Capital 1/9/2025 56N-414 11:22 12:38 75 17.61 14 Reliability 1/9/...

AI summary The text presents a table of events with dates, durations, and categories such as 'Reliability,' 'Capital,' 'Switching,' and 'Tree Trimming,' alongside numerical data. These entries likely represent outage incidents, maintenance activities, or infrastructure-related events, with metrics like duration and cost implications.

ility 1/11/2025 37N-412 10:23 11:39 77 535.48 419 Reliability 1/12/2025 18V-413 10:26 11:46 80 213.92 160 Reliability 1/12/2025 104H-413 11:40 17:58 377 1,112.98 177 Reliability 1/12/2025 67C-411 11:58 13:42 104 5.22 3 Reliability 1/13/202...

AI summary A list of incidents recorded between January 11 and 14, 2025, categorized under Reliability, Capital, Tree Trimming, and Sw, with details on dates, times, and associated metrics such as duration and cost. Entries include outage durations, repair times, and event types.

33 3.29 6 Reliability 1/14/2025 79V-401 20:18 21:31 73 82.42 68 Switching 1/15/2025 50V-402 08:30 08:59 29 0.48 1 Reliability 1/15/2025 50V-401 09:30 14:00 270 121.58 27 Reliability 1/15/2025 59C-402 09:52 10:49 57 1.90 2 Reliability 1/15/...

AI summary The text presents a table of outage events with dates, times, and metrics, categorized under 'Reliability' and 'Capital'. It includes details such as event identifiers, start/end times, and numerical values possibly representing interruption durations or counts. The data appears to track system reliability performance and capital-related activities.

Reliability 1/16/2025 80W-301 11:18 12:55 98 11.39 7 Reliability 1/16/2025 58C-405 13:00 15:00 120 9.97 5 Reliability 1/16/2025 56N-401 19:31 20:32 61 216.41 213 Switching 1/17/2025 126H-313 09:19 10:18 59 5.92 6 Reliability 1/17/2025 80W-...

AI summary A table with dates, times, and reliability metrics from a 2025 Performance Standards Report, including entries categorized under Reliability, Switching, and Capital. Data includes outage durations, customer interruptions, and event types.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 1/17/2025 126H-312 10:56 11:08 13 15.12 72 Reliability 1/17/2025 126H-312 11:03 12:2...

AI summary The table lists power outage events from January 17-20, 2025, detailing start/restore times, durations, customer hours of interruption, and affected customers. Subcauses include Reliability, Switching, and Capital. Metrics like customer hours and interruptions are quantified, with some entries showing high impact (e.g., 2,582.23 customer hours for one event).

1/20/2025 103W-312 10:05 14:40 275 449.43 98 Reliability 1/20/2025 96H-411 12:55 13:43 48 6.45 8 Reliability 1/20/2025 73W-411 14:53 19:07 254 21.15 5 Reliability 1/20/2025 113H-441 17:20 17:55 34 5.15 9 Reliability 1/20/2025 137H-414 22:3...

AI summary The text presents a table of outage events with dates, times, durations, costs, and categories (e.g., Reliability, Planned Transmission, Switching). It includes metrics such as customer interruptions, costs, and durations, highlighting reliability and transmission-related issues in the Nova Scotia power system.

84 675.76 482 Switching 1/22/2025 1N-402 16:27 17:25 57 38.32 40 Switching 1/22/2025 1N-402 16:27 16:50 23 971.04 2,542 Switching 1/22/2025 99H-312 18:27 18:31 4 30.85 482 Switching 1/23/2025 103H-434 10:34 10:49 16 0.52 2 Capital 1/23/202...

AI summary The text lists outage events with dates, durations, and categories such as 'Switching,' 'Reliability,' and 'Planned Transmission.' It includes timestamps, affected circuits, and interruption metrics, indicating operational performance and infrastructure issues in the electricity grid.

81S-306 00:09 00:11 1 39.58 1,649 Planned Transmission 1/26/2025 81S-307 00:09 00:11 2 19.03 732 Planned Transmission 1/26/2025 81S-305 00:09 00:11 2 43.60 1,677 Planned Transmission 1/26/2025 81S-304 00:09 00:11 2 26.74 955 Planned Transm...

AI summary The text presents a table of events with dates, codes, time intervals, durations, costs, and categories such as 'Planned Transmission,' 'Reliability,' 'Switching,' 'Capital,' and 'Tree Trimming.' Metrics include interruption durations, costs, and event types, reflecting operational and infrastructure-related activities.

6 41.33 9 Capital 1/27/2025 4N-312 13:38 16:24 166 49.70 18 Tree Trimming 1/27/2025 126H-311 14:08 15:55 108 17.96 10 Reliability 1/28/2025 62N-415 09:52 11:24 92 162.60 106 Capital 1/28/2025 87H-312 10:01 11:51 110 27.42 15 Reliability 1/...

AI summary The text lists incident records with dates, durations, and categories such as 'Reliability,' 'Switching,' and 'Capital.' Entries include timestamps, outage durations, and associated costs or activities, suggesting operational data related to utility service disruptions and maintenance actions.

411 14:13 16:03 110 1.84 1 Capital 2/1/2025 37N-412 09:59 11:43 104 781.26 449 Reliability 2/1/2025 87W-311 14:45 15:05 21 2.76 8 Reliability 2/1/2025 74N-412 16:59 17:21 22 81.40 223 Capital 2/2/2025 1N-402 13:30 14:34 64 161.12 151 Relia...

AI summary The text presents a table with dates, times, and metrics related to 'Capital' and 'Reliability' categories, likely from a performance report. The reference to '2025 Performance Standards Report Appendix K' indicates discussion of operational metrics and infrastructure performance standards.

5.18 12 Reliability 2025 Performance Standards Report Appendix K Page 3 of 25

AI summary This section heading from the 2025 Performance Standards Report Appendix K discusses reliability metrics, likely outlining performance benchmarks for electrical system reliability under Nova Scotia's regulatory framework.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 2/2/2025 62N-416 14:07 14:33 26 3.42 8 Reliability 2/2/2025 70W-313 21:46 23:19 93 1...

AI summary A table listing power outage events from February 2-3, 2025, with details on start/restore times, interruption durations, customer hours impacted, and subcauses (e.g., reliability, switching). Data includes specific feeders affected and the number of customers interrupted per event.

3 Reliability 2/3/2025 57S-401 16:14 17:08 54 7.16 8 Reliability 2/3/2025 25W-302 19:07 21:48 161 32.14 12 Switching 2/4/2025 11S-411 01:13 05:40 267 13,950.75 3,135 Switching 2/4/2025 54H-302 03:06 04:19 73 81.67 67 Reliability 2/4/2025 1...

AI summary The text presents a table of reliability and switching event data with dates, durations, and customer impact metrics. It includes outage start/end times, affected circuits, interruption durations, and categories like 'Reliability,' 'Switching,' and 'Capital.'

11:38 16:43 306 433.16 85 Capital 2/4/2025 4N-313 11:43 14:01 138 2.30 1 Reliability 2/4/2025 81S-304 12:35 16:15 220 29.35 8 Reliability 2/4/2025 59C-402 13:38 14:43 66 6.58 6 Reliability 2/4/2025 2C-402 17:15 18:21 67 94.69 85 Capital 2/...

AI summary The text presents a table of events from February 4-6, 2025, including timestamps, durations, numerical values, and categories like 'Reliability,' 'Tree Trimming,' and 'Capital.' It appears to track incidents or maintenance activities with associated metrics, though specific context or claims are not explicitly stated.

12.20 11 Reliability 2/6/2025 67C-411 10:11 11:21 70 199.69 172 Reliability 2/6/2025 73W-411 10:23 11:36 73 7.28 6 Reliability 2/6/2025 4S-321 10:46 12:02 76 25.28 20 Reliability 2/6/2025 104H-411 11:17 14:20 183 3.05 1 Capital 2/6/2025 67...

AI summary The text presents a table of events from February 6-8, 2025, categorized under 'Reliability,' 'Capital,' 'Planned Transmission,' and 'Switching,' with associated metrics like duration, cost, and customer impact. It appears to track service interruptions, infrastructure events, and operational data within a regulatory context.

2 Reliability 2/8/2025 54H-302 11:05 14:15 191 193.68 61 Reliability 2/8/2025 101H-412 13:19 14:10 50 7.53 9 Reliability 2/8/2025 55N-202 22:58 23:40 42 131.50 186 Switching 2/9/2025 73W-411 11:56 13:40 104 81.17 47 Switching 2/9/2025 73W-...

AI summary The text presents a table of reliability and switching events with dates, durations, and associated metrics. Entries include incident codes, timestamps, and categorizations under 'Reliability' and 'Switching', indicating operational performance data for a utility provider.

2 11:23 52 0.86 1 Reliability 2/11/2025 87W-311 10:33 11:10 36 4.83 8 Reliability 2/11/2025 62N-415 11:03 11:23 20 3.92 12 Reliability 2/11/2025 55V-314 11:12 11:43 31 1.54 3 Reliability 2/11/2025 50N-410 14:28 16:36 129 60.00 28 Switching...

AI summary The text presents a table of incident data with dates, times, durations, and categories (e.g., 'Reliability', 'Switching') from a 2025 Performance Standards Report Appendix K, Page 4 of 25. The data includes timestamps, durations, and event classifications related to system performance.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 2/12/2025 2H-424 09:30 16:12 402 147.36 22 Reliability 2/12/2025 36V-302 09:34 11:09...

AI summary The table lists power outage events from February 12–15, 2025, detailing feeder lines, start/restore times, interruption durations, customer hours affected, and subcauses (Reliability/Switching). Outages range from 10–320 minutes, impacting 22 to 2,319 customers, with notable entries on 2/14/2025 (25W-302, 18:08–18:19) and 2/15/2025 (85S-401, 14:04–14:55).

Switching 2/15/2025 85S-401 14:04 14:55 51 896.50 1,051 Switching 2/15/2025 83V-303 14:27 15:19 52 14.71 17 Tree Trimming 2/16/2025 54H-302 09:39 12:58 199 33.19 10 Reliability 2/16/2025 104S-311 14:59 17:05 126 10.47 5 Tree Trimming 2/16/...

AI summary A log of incidents with dates, durations, costs, and categories such as 'Switching,' 'Tree Trimming,' and 'Reliability' is presented. The data includes timestamps, incident numbers, and associated costs, but no explicit arguments or discussions are made.

55V-322 04:28 04:43 15 200.55 799 Switching 2/18/2025 55V-322 04:44 12:06 442 375.87 51 Switching 2/18/2025 55V-322 04:44 10:22 338 551.45 98 Switching 2/18/2025 55V-322 04:44 05:57 73 699.20 575 Switching 2/18/2025 65V-302 10:43 11:47 64...

AI summary The text presents a table of outage events with dates, circuit identifiers, timestamps, and reliability metrics. Entries categorize incidents as 'Switching' or 'Reliability,' indicating operational disruptions and their durations. The data reflects system performance during specific periods in early February 2025.

6.92 3 Reliability 2/19/2025 87H-311 14:14 16:49 155 10.31 4 Reliability 2/19/2025 57S-401 14:18 14:37 19 5.30 17 Reliability 2/19/2025 81N-412 21:02 22:57 115 5.74 3 Switching 2/20/2025 40H-303 10:03 11:38 96 22.34 14 Reliability 2/20/202...

AI summary The text lists reliability, switching, and capital-related events with dates, durations, and metrics (e.g., 2/22/2025 event 2H-422 had 395.14 hours of interruption). These data points likely track service disruptions and infrastructure issues, focusing on reliability and system performance.

48H-302 10:33 10:38 5 18.90 225 Reliability 2/23/2025 15N-403 10:34 14:10 216 23.28 9 Reliability 2/23/2025 48H-302 16:27 16:40 13 49.73 225 Switching 2/23/2025 56N-414 16:40 17:19 39 7.14 11 Reliability 2/24/2025 50N-410 11:44 16:17 273 2...

AI summary The text presents data from the 2025 Performance Standards Report Appendix K, detailing reliability and switching events with timestamps, durations, and counts. It includes metrics such as System Average Interruption Frequency Index (SAIFI) and System Average Interruption Duration Index (SAIDI), indicating performance monitoring for grid reliability.

6.16 4 Reliability 2025 Performance Standards Report Appendix K Page 5 of 25

AI summary The text references a section titled 'Reliability' within a 2025 Performance Standards Report Appendix K, indicating a focus on reliability metrics or standards in the context of Nova Scotia's utility regulation.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 2/24/2025 2C-402 18:03 18:48 45 11.27 15 Reliability 2/25/2025 1N-402 10:21 14:57 27...

AI summary The table lists power outage events from February 24–27, 2025, detailing start/restore times, durations, customer hours of interruption, and affected customers. Subcauses include 'Reliability,' 'Switching,' and 'Capital,' with the longest interruption (241.53 customer hours) on 2/25/2025 for feeder 103C-311. Data highlights reliability challenges and infrastructure-related disruptions.

24.58 34 Switching 2/28/2025 62N-414 21:23 21:49 26 3.53 8 Tree Trimming 3/1/2025 62N-415 09:33 12:15 162 13.48 5 Capital 3/1/2025 62N-415 09:33 12:15 162 2.70 1 Capital 3/1/2025 62N-415 09:33 10:59 86 1,430.91 993 Capital 3/1/2025 85S-401...

AI summary The text lists incident records with dates, event codes, timestamps, durations, and categories such as 'Tree Trimming,' 'Capital,' 'Reliability,' and 'Switching.' Each entry includes metrics like affected customers and interruption durations, suggesting operational or infrastructure-related events.

:50 10:33 43 126.38 177 Reliability 3/3/2025 23H-301 10:14 14:19 245 256.79 63 Reliability 3/3/2025 73W-411 12:07 12:42 35 3.48 6 Reliability 3/3/2025 12V-304 15:59 16:23 25 16.85 41 Switching 3/4/2025 37W-201 09:30 10:45 75 3.74 3 Reliabi...

AI summary The text presents a table of incident data from March 3-4, 2025, categorized under 'Reliability' and 'Switching' with metrics like duration, count, and codes. It reflects NSP's operational performance during these periods.

54.38 20 Reliability 2025 Performance Standards Report Appendix K Page 6 of 25

AI summary This section of the 2025 Performance Standards Report addresses reliability metrics, likely detailing performance benchmarks and standards for the electricity sector in Nova Scotia.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 3/7/2025 46W-301 01:03 01:48 45 195.26 260 Switching 3/7/2025 7N-301 05:14 05:24 10...

AI summary The table details outage events on March 7-8, 2025, including start/restore times, durations, customer hours of interruption, and affected customers. Causes include switching, planned transmission, and reliability issues, with varying impacts on customer numbers and durations.

Switching 3/8/2025 11S-301 06:54 07:19 25 61.57 148 Switching 3/8/2025 11S-301 07:17 07:54 37 17.78 29 Switching 3/8/2025 24C-442 08:05 12:59 293 1,290.70 264 Reliability 3/8/2025 88W-323 08:16 10:18 122 2.04 1 Tree Trimming 3/8/2025 141H-...

AI summary The text presents a table of incident records with dates, durations, and categories (e.g., 'Switching,' 'Reliability,' 'Tree Trimming'). Metrics include outage durations, affected customers, and incident types, likely related to utility service disruptions.

85 Reliability 3/15/2025 104H-422 13:16 16:12 176 23.51 8 Reliability 3/15/2025 15S-301 15:32 21:35 363 18.17 3 Reliability 3/15/2025 73W-411 17:05 20:00 176 8.79 3 Tree Trimming 3/15/2025 104H-423 20:07 21:00 54 6.24 7 Reliability 3/16/20...

AI summary The text presents a table of events with dates, durations, and categories such as 'Reliability,' 'Switching,' and 'Capital.' Entries include outage durations, customer interruptions, and event types, highlighting reliability issues and switching incidents between March 15–17, 2025, with some interruptions exceeding 600 hours.

15:12 3 69.63 1,492 Switching 3/17/2025 85S-401 17:27 18:04 37 653.72 1,051 Switching 3/17/2025 2C-402 20:36 22:55 138 3,094.65 1,342 Switching 3/18/2025 3S-403 08:21 08:42 21 212.96 605 Switching 3/18/2025 81S-306 12:55 14:15 80 11.95 9 R...

AI summary The text presents a table of events with dates, codes, times, and metrics, including terms like 'Switching' and 'Reliability'. It is part of the '2025 Performance Standards Report Appendix K', indicating data related to system performance and service interruptions.

2.57 10 Reliability 2025 Performance Standards Report Appendix K Page 7 of 25

AI summary The text is a section heading from the 2025 Performance Standards Report Appendix K, focusing on reliability metrics. No detailed content or analysis is provided in the excerpt.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 3/18/2025 55V-322 21:41 21:52 11 242.44 1,362 Switching 3/19/2025 11S-301 09:39 10:4...

AI summary The table lists power interruption events from March 18-20, 2025, detailing feeder identifiers, outage durations, customer hours impacted, and subcauses like 'Switching' and 'Reliability'. Data highlights varying interruption durations (4-524 minutes) and customer impacts (1-1,362 customers), emphasizing reliability challenges in the distribution system.

3 Reliability 3/20/2025 57S-401 10:04 13:42 219 14.57 4 Reliability 3/20/2025 57S-401 10:14 11:55 101 8.45 5 Reliability 3/20/2025 57S-401 11:55 13:16 81 1.35 1 Reliability 3/20/2025 57S-401 13:15 14:25 70 5.84 5 Reliability 3/21/2025 15N-...

AI summary The text presents a table of reliability and switching event data from March 2025, including dates, event codes, time intervals, interruption durations, and counts. It highlights metrics such as customer interruption hours, frequency, and duration across different system segments.

17:44 68 1.13 1 Reliability 3/24/2025 87H-311 08:20 12:34 254 12.71 3 Capital 3/24/2025 87H-311 08:22 12:33 252 25.16 6 Capital 3/24/2025 87H-311 08:23 12:32 249 29.11 7 Capital 3/24/2025 87H-311 08:24 12:32 248 41.29 10 Capital 3/24/2025...

AI summary The text lists outage events on March 24, 2025, with details on start/end times, affected customers, interruption duration, and categories (e.g., 'Reliability', 'Capital'). Data includes metrics like customer hours of interruption and event frequency, reflecting reliability and capital-related performance indicators.

73 87.05 14 Reliability 3/25/2025 63V-311 10:12 15:12 300 74.97 15 Reliability 3/25/2025 40H-305 10:18 15:22 304 50.72 10 Capital 3/25/2025 25W-301 12:56 13:22 26 2.64 6 Reliability 3/25/2025 57S-401 12:57 15:50 173 28.75 10 Reliability 3/...

AI summary The text presents a table of events with dates, codes, start/end times, durations, and categories like 'Reliability' and 'Capital.' It appears to document outage or incident records, including metrics such as interruption frequency and duration, though specific discussion of reliability or capital expenditures is not elaborated.

lity 3/27/2025 78W-301 11:19 14:50 211 21.08 6 Reliability 3/27/2025 99V-312 11:25 14:53 208 197.56 57 Reliability 3/27/2025 56N-414 13:01 13:39 37 3.12 5 Reliability 3/27/2025 2C-402 14:56 15:48 52 10.32 12 Reliability 3/28/2025 21W-312 0...

AI summary The text presents a table of incident data from March 27-28, 2025, including dates, codes, durations, and categories like 'Reliability' and 'Switching'. It is part of the '2025 Performance Standards Report Appendix K', indicating performance metrics for a utility or regulatory body.

42.25 17 Reliability 2025 Performance Standards Report Appendix K Page 8 of 25

AI summary The text references a section (42.25) and page number (17) from the 2025 Performance Standards Report Appendix K, focusing on reliability metrics. The content appears to be part of a regulatory document discussing performance benchmarks but lacks detailed arguments or data.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 3/28/2025 40H-302 11:08 16:40 332 121.79 22 Reliability 3/28/2025 111S-311 12:52 13:...

AI summary The table presents outage data from NS Power, detailing interruptions by date, feeder, duration, customer impact, and subcauses like reliability and capital. It includes metrics such as customer hours of interruption and subcause categories (e.g., Reliability, Capital, Switching).

16.30 12 Reliability 4/3/2025 89W-303 10:02 12:20 138 11.49 5 Reliability 4/3/2025 88H-401 10:21 13:03 162 27.02 10 Reliability 4/3/2025 57S-401 11:29 12:48 79 7.86 6 Reliability 4/3/2025 22C-404 12:48 13:10 22 0.37 1 Reliability 4/4/2025...

AI summary The text presents a table of data entries with dates, identifiers, time intervals, durations, costs, and categories such as 'Reliability', 'Capital', and 'Switching'. It appears to document service interruptions, capital expenditures, and switching events, likely related to utility operations and regulatory reporting.

13:46 15:12 87 15.88 11 Reliability 4/8/2025 88W-312 03:32 04:17 44 60.03 81 Switching 4/8/2025 57S-401 08:45 11:53 189 91.12 29 Capital 4/8/2025 22N-402 09:12 11:27 134 71.64 32 Tree Trimming 4/8/2025 101H-413 09:52 10:16 24 5.63 14 Relia...

AI summary The text presents a table with dates, codes, time intervals, numerical values, and categories like 'Reliability,' 'Switching,' and 'Tree Trimming.' It appears to document outage events, maintenance activities, or system performance metrics, with 'Reliability' being a recurring theme.

7 Reliability 4/9/2025 101H-423 10:01 14:45 283 18.88 4 Reliability 4/9/2025 22C-404 10:33 14:17 224 317.19 85 Reliability 4/9/2025 57S-401 11:18 11:56 38 0.64 1 Reliability 4/9/2025 46W-301 12:23 14:32 129 2.15 1 Reliability 4/9/2025 57S-...

AI summary The text presents a table of reliability and switching events with dates, durations, customer counts, and categories. Entries include outage details, such as dates (4/9/2025–4/12/2025), circuit identifiers (e.g., 101H-423), interruption durations (e.g., 283 minutes), customer numbers (e.g., 2,030), and classifications (Reliability, Switching, Capital). Metrics like SAIDI/SAIFI may be implied.

25 1.24 3 Reliability 4/12/2025 7N-302 06:00 06:10 10 338.33 2,030 Planned Transmission 4/12/2025 3N-412 06:00 06:10 10 148.83 893 Planned Transmission 4/12/2025 3S-301 15:06 16:18 71 4.77 4 Reliability 4/13/2025 101H-422 08:05 16:01 475 1...

AI summary The text presents outage data with dates, durations, and reasons (e.g., 'Planned Transmission,' 'Reliability'), along with metrics like customer interruptions and service restoration times. It appears to be part of a 2025 Performance Standards Report Appendix K, focusing on reliability and operational performance metrics.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 4/14/2025 62N-416 10:04 12:42 158 26.34 10 Reliability 4/14/2025 87H-311 13:22 16:08...

AI summary The table lists power outage events from April 14-16, 2025, including start/restore times, durations, customer hours of interruption, and subcauses (e.g., Reliability, Switching, Capital). Data highlights varying outage durations and customer impacts across different feeders.

265.92 222 Reliability 4/16/2025 101H-423 10:17 17:42 445 22.27 3 Switching 4/16/2025 77V-301 10:26 12:07 101 42.21 25 Capital 4/16/2025 40H-303 11:04 11:35 30 13.13 26 Reliability 4/16/2025 20H-304 11:17 12:07 50 2,786.40 3,339 Switching...

AI summary The table lists reliability and maintenance events with dates, incident identifiers, durations, and categories like 'Reliability,' 'Switching,' and 'Capital.' Metrics include interruption durations, costs, and event types, reflecting NS Power's operational performance and infrastructure management.

15:44 94 4.69 3 Reliability 4/22/2025 58H-421 14:12 15:16 65 6.46 6 Reliability 4/23/2025 87H-312 09:05 10:54 110 5.49 3 Capital 4/23/2025 55V-314 09:57 10:08 11 0.38 2 Capital 4/23/2025 101H-422 10:21 14:30 249 33.20 8 Reliability 4/23/20...

AI summary A table listing dates, incident identifiers, time intervals, numerical values, and categories such as 'Reliability,' 'Capital,' and 'Switching.' The data appears to track events or metrics related to system performance, capital activities, and switching operations.

57S-401 10:58 14:24 205 34.18 10 Reliability 4/30/2025 113H-434 11:06 11:49 42 5.63 8 Reliability 4/30/2025 81S-302 11:28 11:38 10 1.16 7 Reliability 4/30/2025 76V-301 13:06 15:13 127 12.68 6 Reliability 4/30/2025 76V-301 13:08 15:12 124 8...

AI summary The text presents a table with dates, codes, and metrics related to reliability and capital categories, likely from a 2025 Performance Standards Report. Entries include dates like 4/30/2025 and codes such as 57S-401, with numerical values and terms like 'Reliability' and 'Capital'.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 4/30/2025 88W-313 21:20 00:02 162 24.33 9 Capital 4/30/2025 20H-301 22:37 23:53 76 1...

AI summary The table details power outage incidents between April 30 and May 4, 2025, including start/restore times, durations, customer hours of interruption, affected customers, and causes (e.g., Reliability, Capital, Planned Transmission). Metrics highlight significant disruptions, such as 479.67 customer hours for one incident linked to Planned Transmission.

4 14:51 16:30 100 8.31 5 Capital 5/5/2025 126H-311 14:54 20:35 341 130.69 23 Capital 5/5/2025 65V-303 19:12 19:30 17 0.29 1 Switching 5/6/2025 92H-331 09:14 13:05 231 15.38 4 Tree Trimming 5/6/2025 113H-433 09:24 09:54 30 1.48 3 Reliabilit...

AI summary The text presents a table listing incidents with dates, durations, costs, and categories such as 'Reliability,' 'Tree Trimming,' and 'Planned Transmission.' It appears to document outage events, maintenance activities, and associated metrics like customer interruptions and costs.

284 99.48 21 Reliability 5/7/2025 89W-302 09:50 10:33 43 1.44 2 Reliability 5/7/2025 81S-305 10:58 12:19 82 12.28 9 Reliability 5/7/2025 56N-414 12:52 15:23 151 72.78 29 Reliability 5/8/2025 70W-321 07:38 15:12 454 15.12 2 Reliability 5/8/...

AI summary The text presents a table of events from May 7-9, 2025, categorized under 'Reliability,' 'Capital,' and 'Tree Trimming,' with metrics such as interruption duration, frequency, and associated costs. Events include power outages, capital-related activities, and tree-trimming incidents, highlighting system performance and infrastructure issues.

Tree Trimming 5/9/2025 92H-331 12:41 16:10 210 38.44 11 Tree Trimming 5/9/2025 65V-302 13:24 16:50 207 3.45 1 Reliability 5/11/2025 2H-411 08:26 17:23 537 8.95 1 Capital 5/12/2025 50N-411 08:53 14:48 355 41.47 7 Capital 5/12/2025 81S-301 1...

AI summary The document presents a table of events with dates, identifiers, time intervals, costs, and categories such as 'Tree Trimming,' 'Reliability,' and 'Capital.' It highlights high-cost entries under 'Capital' and multiple reliability-related incidents, suggesting focus areas for infrastructure and operational management.

15.62 5 Reliability 2025 Performance Standards Report Appendix K Page 11 of 25

AI summary The text references a section titled 'Reliability' from the 2025 Performance Standards Report Appendix K, page 11 of 25. The context suggests the document discusses reliability metrics or standards within Nova Scotia's energy sector.

19 Switching 5/18/2025 101H-423 09:21 10:35 74 14.73 12 Capital 5/18/2025 87H-312 10:54 12:10 75 7.51 6 Reliability 5/18/2025 50N-410 14:28 14:52 25 41.33 100 Switching 5/20/2025 92H-331 09:27 11:04 97 12.90 8 Tree Trimming 5/20/2025 50V-4...

AI summary A table listing power outage events with dates, durations, and categories such as 'Switching,' 'Reliability,' and 'Tree Trimming,' alongside associated metrics like customer interruptions and restoration times. The data appears to track service disruptions and maintenance activities managed by Nova Scotia Power.

1 09:24 13:06 222 25.95 7 Reliability 5/21/2025 23H-302 09:33 15:44 371 593.17 96 Reliability 5/21/2025 19C-204 10:01 11:30 89 26.69 18 Reliability 5/21/2025 48H-301 10:06 14:15 249 16.59 4 Reliability 5/21/2025 103C-314 10:19 10:44 25 1.2...

AI summary The document presents a table of events with dates, durations, and categories such as 'Reliability', 'Capital', and 'Tree Trimming'. Entries include timestamps, numerical values, and classifications, primarily focusing on reliability-related incidents and tree trimming activities on May 21-22, 2025.

Reliability 5/27/2025 99H-311 06:24 06:40 16 1.89 7 Switching 5/27/2025 73W-411 07:46 13:13 327 5.45 1 Capital 5/27/2025 73W-411 07:48 13:13 325 16.25 3 Capital 5/27/2025 81S-305 08:11 09:15 64 9.62 9 Capital 5/27/2025 37N-413 08:56 12:11...

AI summary The data presents outage events on May 27, 2025, detailing durations, affected customers, and causes (e.g., switching, capital, reliability, tree trimming). Key metrics include SAIDI and SAIFI, highlighting reliability challenges and capital-related disruptions.

158 29.03 11 Reliability 5/28/2025 22W-311 02:08 04:51 163 3,237.54 1,191 Planned Transmission 5/28/2025 22W-312 02:09 04:52 162 3,000.28 1,108 Planned Transmission 5/28/2025 22W-313 02:10 04:52 163 2,990.00 1,104 Planned Transmission 5/28...

AI summary The text presents outage data from May 28, 2025, including details on duration, affected circuits, and causes such as 'Planned Transmission' and 'Reliability.' It references the 2025 Performance Standards Report Appendix K, Page 12 of 25, indicating performance metrics related to grid operations.

6.00 13 Reliability 2025 Performance Standards Report Appendix K Page 12 of 25

AI summary This section of the 2025 Performance Standards Report Appendix K discusses reliability metrics, focusing on system performance indicators and service quality benchmarks. The page reference indicates this is part of a broader document analyzing utility performance standards.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 5/29/2025 81S-307 08:21 09:54 92 13.85 9 Reliability 5/29/2025 73W-411 08:56 16:00 4...

AI summary The table details power outage events on May 29-30, 2025, including start/restore times, durations, customer hours impacted, and CEA subcauses (e.g., Reliability, Capital, Switching). Outages range from 53 to 4,803 customers affected, with durations between 53 minutes and 412 minutes, highlighting reliability and infrastructure challenges.

y 5/30/2025 78W-301 10:55 11:32 37 6.70 11 Reliability 5/30/2025 126H-311 11:20 14:21 181 6.03 2 Reliability 5/30/2025 82V-422 13:32 14:23 51 22.25 26 Reliability 5/31/2025 56N-414 23:26 23:59 34 1,805.11 3,193 Switching 6/1/2025 77V-301 0...

AI summary The text presents a table of incident records with dates, durations, costs, and categories (e.g., Reliability, Switching, Capital). It highlights outage events, infrastructure-related costs, and planned transmission activities, reflecting operational and reliability metrics for a utility provider.

15 Reliability 6/6/2025 113H-431 10:25 11:00 35 4.09 7 Reliability 6/6/2025 54H-304 10:59 11:29 30 5.51 11 Reliability 6/6/2025 62H-304 11:23 14:02 159 2.65 1 Reliability 6/6/2025 62H-304 13:59 14:43 43 0.72 1 Reliability 6/8/2025 102W-311...

AI summary The text presents a table of incident data with dates, identifiers, durations, and categories such as 'Reliability,' 'Switching,' 'Planned Transmission,' 'Capital,' and 'R.' The data appears to track events with associated metrics but lacks narrative context or discussion of themes beyond the raw figures.

139 13.88 6 Reliability 6/9/2025 99H-311 12:30 17:30 301 170.41 34 Reliability 6/9/2025 40H-304 13:53 14:34 41 7.52 11 Reliability 6/9/2025 40H-302 13:55 14:06 10 2.25 13 Reliability 6/9/2025 56N-414 15:12 16:30 78 2.59 2 Capital 6/10/2025...

AI summary The text presents a table with dates, event codes, timestamps, numerical values, and categories such as 'Reliability' and 'Capital' from the 2025 Performance Standards Report Appendix K. No explicit arguments or discussions are present, only data points.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 6/10/2025 113H-434 09:05 16:04 419 1,150.93 165 Tree Trimming 6/10/2025 55V-313 09:0...

AI summary The table lists power outage events from June 10–11, 2025, with details on start/restore times, durations, customer hours of interruption, and subcauses (e.g., Tree Trimming, Capital, Reliability). Metrics include 1,150.93 customer hours of interruption and 165 affected customers for one event, highlighting reliability and capital-related issues.

09:39 17 0.86 3 Reliability 6/12/2025 91W-411 09:30 10:29 58 3.89 4 Reliability 6/12/2025 126H-312 10:13 10:28 15 0.97 4 Reliability 6/12/2025 87H-312 11:10 12:34 84 8.38 6 Reliability 6/12/2025 15S-301 11:27 12:10 44 11.61 16 Reliability...

AI summary The text lists reliability and switching events with dates, durations, and categories, including entries under 'Reliability,' 'Switching,' and 'Capital.' Data includes outage durations, customer hours, and incident classifications, suggesting analysis of power system performance and infrastructure issues.

247.89 896 Switching 6/15/2025 88W-313 04:59 10:03 305 324.87 64 Capital 6/15/2025 23H-304 09:02 13:37 275 916.93 200 Capital 6/16/2025 81S-307 09:16 12:24 188 28.15 9 Capital 6/16/2025 56N-414 09:59 12:16 137 15.98 7 Capital 6/16/2025 11S...

AI summary The document presents a table of events from June 15-17, 2025, categorized under 'Capital,' 'Reliability,' 'Tree Trimming,' and 'Switching,' with associated metrics like duration, cost, and event type. These entries likely relate to utility operations, infrastructure maintenance, and service interruptions.

09:17 09:22 6 5.30 56 Capital 6/17/2025 82V-422 09:43 15:32 349 151.17 26 Reliability 6/17/2025 113H-431 10:28 11:55 87 4.37 3 Capital 6/17/2025 111S-312 10:44 11:56 72 8.37 7 Reliability 6/17/2025 104H-421 10:55 12:08 73 12.18 10 Capital...

AI summary A table listing events with dates, durations, and categories such as 'Capital,' 'Reliability,' and 'Planned Transmission.' Entries include timestamps, numerical values, and descriptions, potentially reflecting operational or infrastructure-related activities by Nova Scotia Power.

164 92.81 34 Reliability 6/18/2025 73W-411 11:52 13:11 79 9.21 7 Reliability 6/18/2025 73W-411 11:57 15:08 191 6.37 2 Reliability 6/18/2025 56N-414 13:12 16:21 189 18.92 6 Reliability 6/19/2025 20N-203 05:54 06:14 19 9.98 31 Switching 6/19...

AI summary The text presents data from a 2025 Performance Standards Report Appendix K, detailing metrics related to reliability and switching events, including dates, durations, and event counts. It appears to focus on system performance indicators and incident management.

33.59 7 Reliability 2025 Performance Standards Report Appendix K Page 14 of 25

AI summary This section of the 2025 Performance Standards Report Appendix K discusses reliability metrics, focusing on system performance indicators and operational standards. It appears to outline key reliability targets or performance evaluations for Nova Scotia's electricity system.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 6/19/2025 15S-303 10:38 16:07 329 60.37 11 Capital 6/19/2025 101H-421 10:57 11:57 60...

AI summary The text presents a table of power interruption events from June 2025, detailing start/restore times, durations, customer hours of interruption, and subcauses (e.g., Capital, Reliability, Switching). Metrics include customer hours affected, feeder identifiers, and event durations, highlighting system reliability and capital expenditure-related disruptions.

24/2025 56N-414 12:28 15:01 154 10.26 4 Reliability 6/24/2025 40H-304 13:00 13:26 26 4.85 11 Reliability 6/25/2025 56N-414 00:00 12:13 734 36.69 3 Reliability 6/25/2025 22N-402 08:30 17:26 537 35.77 4 Reliability 6/25/2025 23H-304 08:57 15...

AI summary The text presents a table of events with dates, identifiers, time intervals, and associated metrics, categorized under 'Reliability,' 'Tree Trimming,' 'Switching,' and 'Capital.' Metrics include interruption durations, customer impacts, and event types, suggesting analysis of grid performance and infrastructure issues.

16:07 427 540.97 76 Tree Trimming 6/26/2025 50W-412 09:45 14:46 301 65.31 13 Reliability 6/26/2025 57S-401 09:51 11:00 69 100.95 88 Reliability 6/26/2025 4N-312 10:59 15:10 251 29.34 7 Reliability 6/26/2025 4N-312 10:59 11:36 37 26.77 43 R...

AI summary A table lists events with dates, durations, costs, and categories (e.g., 'Reliability', 'Switching', 'Capital'). Entries include incident details like outage durations, costs, and actions (e.g., 'Tree Trimming'). The data appears to track utility operations, potentially related to NS Power's service disruptions and maintenance activities.

2.12 2 Capital 6/30/2025 30N-412 13:12 13:35 24 206.19 526 Switching 6/30/2025 57S-402 14:34 15:40 66 14.28 13 Reliability 7/2/2025 22N-402 09:26 12:41 195 9.76 3 Capital 7/2/2025 22C-404 10:51 11:24 33 218.59 399 Reliability 7/2/2025 56N-...

AI summary The text presents a table tracking events with dates, durations, costs, and categories such as 'Reliability' and 'Capital.' It appears to document system interruptions, their frequency, and associated costs, potentially related to grid reliability and capital expenditures.

pital 7/3/2025 96H-411 12:10 12:49 39 0.65 1 Reliability 7/3/2025 57W-401 12:18 16:15 237 19.78 5 Capital 7/3/2025 4S-321 13:27 13:39 13 1.92 9 Reliability 7/3/2025 4S-321 13:32 13:51 20 9.22 28 Reliability 7/3/2025 81N-412 14:50 15:50 60...

AI summary The text presents a table of events with dates, durations, and categories such as 'Reliability' and 'Capital' from the 2025 Performance Standards Report. It includes metrics like interruption durations and frequencies, indicating performance monitoring for utility operations.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 7/6/2025 2H-411 10:30 13:48 199 3.32 1 Reliability 7/6/2025 92W-302 16:49 17:24 35 0...

AI summary The table details power outages from July 6-9, 2025, with start/restore times, durations, customer hours of interruption, and affected customers. Most outages are attributed to 'Reliability' issues, with one linked to 'Capital' expenditures. Data highlights frequent and prolonged interruptions, impacting multiple customers per event.

Reliability 7/8/2025 62N-416 17:40 18:04 25 1.24 3 Reliability 7/9/2025 77V-302 08:38 15:46 428 71.35 10 Reliability 7/9/2025 59C-403 09:02 10:25 83 5.56 4 Reliability 7/9/2025 57S-402 09:21 11:29 128 23.51 11 Capital 7/9/2025 99H-311 11:5...

AI summary The text presents a table of events with dates, codes, times, numerical metrics, and categories such as 'Reliability,' 'Capital,' and 'Switching.' It includes data points like interruption durations, frequencies, and associated costs, potentially related to utility operations and infrastructure management in Nova Scotia.

256.37 81 Reliability 7/10/2025 2C-401 08:59 14:10 311 77.70 15 Capital 7/10/2025 2H-421 09:57 10:20 23 980.48 2,550 Switching 7/10/2025 87W-312 10:04 10:19 15 1.25 5 Reliability 7/10/2025 77V-303 10:29 12:24 115 135.55 71 Capital 7/10/202...

AI summary The text presents a table of reliability, capital, and switching events with dates, durations, and associated costs for NS Power on July 10-13, 2025, including metrics like customer interruptions and costs.

1,350 67.52 3 Switching 7/21/2025 46W-303 08:59 11:15 136 4.53 2 Reliability 7/21/2025 40H-302 11:09 13:43 154 48.74 19 Reliability 7/22/2025 57S-402 08:51 12:00 188 332.89 106 Capital 7/22/2025 62N-416 09:01 16:41 460 22.99 3 Capital 7/22...

AI summary The text presents data points from a 2025 Performance Standards Report Appendix K, including dates, time intervals, numerical values, and categories like 'Reliability' and 'Capital'. These entries appear to track performance metrics, potentially related to service interruptions or capital project timelines.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 7/22/2025 62N-413 09:37 12:48 191 28.67 9 Reliability 7/22/2025 81S-302 10:46 13:40...

AI summary The table presents data on power outage events from July 22-24, 2025, including feeder identifiers, interruption durations, customer hours of interruption, and causes (e.g., Reliability, Capital, Tree Trimming). It highlights system performance metrics and outage management during a regulatory proceeding.

bility 7/24/2025 22V-322 08:50 11:04 134 53.74 24 Reliability 7/24/2025 79V-402 10:04 11:17 73 102.20 84 Switching 7/24/2025 101H-412 13:24 13:52 28 5.16 11 Customer Requested 7/25/2025 104H-441 08:09 15:21 433 137.05 19 Reliability 7/25/2...

AI summary The text presents a table of interruption events with dates, durations, and classifications (e.g., Reliability, Switching, Planned Transmission). It includes metrics such as customer hours of interruption, event durations, and categories indicating causes (e.g., reliability issues, planned transmission work).

59C-402 15:13 15:41 28 85.05 180 Capital 7/29/2025 22C-404 19:02 19:29 27 173.44 384 Reliability 7/30/2025 50N-410 07:39 13:43 365 42.55 7 Reliability 7/30/2025 57S-402 08:54 09:51 57 44.70 47 Reliability 7/30/2025 104H-442 10:12 15:58 346...

AI summary The text presents a table of events with dates, durations, costs, and categories such as 'Reliability,' 'Capital,' 'Switching,' and 'Planned Transmission.' It includes data on interruptions, costs, and durations associated with various incidents and infrastructure activities.

2,164 Planned Transmission 7/31/2025 126H-313 23:54 04:37 282 8,586.77 1,826 Planned Transmission 7/31/2025 126H-311 23:54 04:37 282 7,578.95 1,611 Planned Transmission 8/3/2025 62N-414 13:44 14:45 62 7.18 7 Reliability 8/4/2025 13V-303 09...

AI summary The text presents a table of outage events with dates, durations, costs, and categories such as 'Planned Transmission,' 'Reliability,' and 'Capital.' It highlights infrastructure planning, reliability management, and capital expenditures related to power system operations in Nova Scotia.

7.41 2 Reliability 2025 Performance Standards Report Appendix K Page 17 of 25

AI summary The text references a section titled 'Reliability' within the 2025 Performance Standards Report Appendix K, indicating a focus on reliability metrics and performance benchmarks. The page number (17 of 25) suggests this is part of a larger document discussing utility reliability standards.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 8/7/2025 101H-411 10:07 11:36 88 16.17 11 Capital 8/7/2025 129H-412 10:07 11:14 67 7...

AI summary The table lists power outage events from August 7-10, 2025, detailing feeder lines, outage durations, customer hours of interruption, and subcauses (e.g., Capital, Reliability, Switching). Notable entries include a 358-minute outage on 8/8/2025 affecting 227 customers and a 1,354-minute interruption on the same day for 14 customers linked to switching issues.

02 07:42 07:43 1 22.79 1,028 Switching 8/15/2025 131H-424 12:36 13:37 61 1.02 1 Reliability 8/15/2025 57C-426 15:40 16:55 75 2,059.66 1,644 Switching 8/15/2025 131H-424 16:32 16:33 1 0.22 12 Reliability 8/16/2025 73W-411 10:31 12:34 123 6....

AI summary A table listing system events with dates, durations, and categories (e.g., 'Switching', 'Reliability', 'Planned Transmission'). Entries include timestamps, event codes, and associated metrics, suggesting analysis of grid performance and outage management.

51.95 18 Reliability 8/18/2025 1N-421 13:27 15:08 101 8.39 5 Reliability 8/18/2025 73W-411 14:49 17:22 152 5.08 2 Reliability 8/18/2025 25W-303 15:04 15:31 27 5.79 13 Tree Trimming 8/18/2025 73W-411 19:53 20:43 51 78.82 93 Switching 8/19/2...

AI summary The text presents a table of reliability and outage events with dates, times, and categories like 'Reliability,' 'Switching,' and 'Tree Trimming.' Metrics include customer interruptions, duration, and event types, reflecting NS Power's operational performance during specific periods.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 8/21/2025 96H-411 10:02 11:15 73 46.30 38 Reliability 8/21/2025 46W-301 10:30 12:18...

AI summary The table lists power outage events with details on dates, durations, customer impact, and subcauses such as Reliability and Planned Transmission. Outages range from 13 to 472 minutes, affecting 5 to 1,768 customers, with durations and subcauses indicating both reliability issues and planned transmission activities.

Planned Transmission 8/25/2025 55V-322 23:04 23:35 31 704.84 1,362 Planned Transmission 8/25/2025 55V-323 23:05 23:36 31 610.72 1,179 Planned Transmission 8/26/2025 73W-411 08:45 13:14 269 17.94 4 Reliability 8/26/2025 59C-402 10:15 11:50...

AI summary A log of events with dates, durations, and categories such as 'Planned Transmission,' 'Reliability,' 'Switching,' and 'Capital,' including metrics like duration, quantity, and cost. Entries detail operational activities and infrastructure-related events.

7 133 57.75 26 Capital 8/28/2025 89W-302 09:40 15:23 343 22.84 4 Capital 8/28/2025 104H-433 09:54 11:26 91 21.32 14 Reliability 8/28/2025 37N-412 10:32 13:54 201 26.86 8 Reliability 8/28/2025 57S-402 12:44 14:49 125 284.85 137 Capital 8/29...

AI summary The text presents a table of outage events with dates, durations, and categories (e.g., 'Capital,' 'Reliability,' 'Switching'). It highlights interruptions affecting customers, including durations, numbers of customers impacted, and associated costs, reflecting operational challenges in grid management and infrastructure maintenance.

821.15 4,479 Planned Transmission 9/4/2025 88W-323 03:00 03:12 12 368.00 1,840 Planned Transmission 9/4/2025 16W-301 03:07 03:24 17 977.19 3,455 Planned Transmission 9/4/2025 73W-411 08:44 13:01 257 17.12 4 Reliability 9/4/2025 57S-402 08:...

AI summary The text presents a table of events with dates, times, durations, and associated numerical values, categorized under 'Planned Transmission,' 'Reliability,' 'Capital,' and 'Switching.' These entries likely represent outage or maintenance records, including costs and customer interruptions, though specific details are incomplete.

ng 9/8/2025 58C-405 08:09 08:52 43 119.27 167 Switching 9/8/2025 15N-403 10:28 17:19 412 27.45 4 Reliability 9/9/2025 40H-305 08:47 13:30 283 132.06 28 Reliability 9/9/2025 79V-401 09:21 12:24 183 12.22 4 Reliability 9/9/2025 83V-303 10:03...

AI summary The document contains a table of event records with dates, times, and metrics (e.g., interruptions, durations) categorized under 'Switching,' 'Reliability,' and 'Capital.' It references the '2025 Performance Standards Report Appendix K,' indicating evaluation of operational performance and compliance with regulatory benchmarks.

141.34 32 Reliability 2025 Performance Standards Report Appendix K Page 19 of 25

AI summary The text references a section titled 'Reliability' within the 2025 Performance Standards Report Appendix K, indicating a focus on reliability metrics or performance criteria. The numeric values (141.34, 32) may relate to specific reliability indices or benchmarks, though context is limited.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 9/9/2025 93V-311 10:38 11:45 67 54.57 49 Reliability 9/9/2025 70V-312 12:54 11:30 17...

AI summary The table lists power outage events with details including dates, feeders, start/restore times, durations, customer hours of interruption, and causes (e.g., reliability, tree trimming). It highlights interruptions affecting varying numbers of customers, with durations ranging from minutes to hours, and subcauses like switching and reliability.

Reliability 9/11/2025 80W-301 11:00 14:50 230 7.68 2 Reliability 9/11/2025 37N-414 11:20 15:56 276 142.58 31 Reliability 9/11/2025 79V-402 11:29 12:20 51 9.31 11 Reliability 9/11/2025 50W-411 11:53 17:46 353 52.93 9 Reliability 9/12/2025 6...

AI summary The text presents a table of events with dates, durations, and categories such as 'Reliability,' 'Switching,' and 'Planned Transmission,' indicating operational data related to grid performance and infrastructure. Entries include metrics like customer interruptions, durations, and event types, reflecting reliability and transmission planning issues.

152 42.96 17 Reliability 9/14/2025 82V-403 09:21 10:05 44 2.93 4 Reliability 9/14/2025 139H-414 10:55 13:27 152 15.25 6 Reliability 9/15/2025 131H-422 01:50 13:16 685 742.39 65 Switching 9/15/2025 37N-414 07:58 12:20 262 8.72 2 Tree Trimmi...

AI summary The text presents a list of events with dates, identifiers, time intervals, numerical values, and categories such as 'Reliability,' 'Switching,' 'Tree Trimming,' and 'Capital.' These entries appear to document service interruptions or operational events, with metrics like duration and impact, though no explicit claims or contextual discussion are provided.

16/2025 131H-423 09:29 10:12 43 4.31 6 Reliability 9/16/2025 62N-415 10:37 12:03 86 4.29 3 Reliability 9/16/2025 57S-402 10:42 12:25 103 12.06 7 Reliability 9/16/2025 48W-201 11:16 12:10 55 3.63 4 Tree Trimming 9/16/2025 81N-411 17:54 23:1...

AI summary The text presents a table of service interruption events with dates, circuit identifiers, start/end times, durations, counts, and categories (e.g., Reliability, Tree Trimming). It highlights outage durations, customer impacts, and contributing factors, though no explicit discussion of policies, arguments, or regulatory decisions is present.

2.44 3 Reliability 9/18/2025 88W-323 09:54 10:14 20 62.95 190 Reliability 9/18/2025 12V-302 09:57 13:33 216 75.57 21 Reliability 9/18/2025 50N-410 10:07 11:02 55 0.91 1 Reliability 9/18/2025 4N-312 12:53 13:03 10 755.41 4,756 Planned Trans...

AI summary The text presents a table of events with dates, identifiers, durations, and categories such as 'Reliability,' 'Planned Transmission,' 'Switching,' and 'Capital.' Entries include outage durations, affected customers, and event types, suggesting analysis of grid reliability and operational performance.

57C-426 08:44 12:08 204 335.81 99 Reliability 9/22/2025 62N-413 10:52 12:59 127 12.71 6 Tree Trimming 9/22/2025 103H-432 12:59 16:29 211 10.53 3 Reliability 9/22/2025 50N-410 13:38 14:49 71 5.91 5 Reliability 9/23/2025 78W-301 02:02 03:24...

AI summary The text presents a table of event records with dates, codes, durations, and categories like 'Reliability' and 'Tree Trimming,' alongside a reference to the '2025 Performance Standards Report Appendix K.' It appears to document operational metrics and planned activities related to utility services.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 9/23/2025 14V-303 06:33 06:42 10 1.95 12 Planned Transmission 9/23/2025 20H-305 08:2...

AI summary The table lists power outage events from September 23–26, 2025, detailing feeder lines, outage durations, customer hours of interruption, and subcauses (e.g., Reliability, Tree Trimming, Switching, Capital). Events range from 8 to 621 minutes, affecting 4 to 313 customers, with subcauses including planned transmission, reliability issues, and tree trimming.

621.26 168 Reliability 9/25/2025 78W-301 15:00 15:37 38 53.89 86 Switching 9/26/2025 50W-411 10:19 11:02 44 5.12 7 Reliability 9/26/2025 57S-401 11:57 14:28 151 50.20 20 Reliability 9/27/2025 37N-411 10:02 10:46 44 636.14 861 Capital 9/27/...

AI summary A log of service interruptions with dates, durations, and categories like Reliability and Tree Trimming, indicating system performance and maintenance activities.

Reliability 9/29/2025 111S-312 09:46 12:28 162 56.64 21 Reliability 9/29/2025 50W-412 10:53 11:40 48 141.30 178 Reliability 9/29/2025 124H-301 15:41 17:53 1,572 471.56 18 Switching 9/30/2025 4C-430 03:00 08:06 305 9,321.85 2,513 Reliabilit...

AI summary The text presents a table of event records from October 2025, categorizing incidents by type (e.g., Reliability, Switching, Tree Trimming) with timestamps, durations, and associated metrics. Key themes include reliability performance, infrastructure-related events, and planned transmission activities.

05:45 07:16 91 473.26 313 Planned Transmission 10/2/2025 14V-303 05:45 06:42 57 11.35 12 Planned Transmission 10/2/2025 96H-411 08:14 11:46 212 14.14 4 Capital 10/2/2025 101H-413 09:00 15:10 370 641.25 104 Reliability 10/2/2025 131H-423 10...

AI summary The text lists outage events with timestamps, durations, costs, and categories (e.g., 'Planned Transmission,' 'Reliability,' 'Tree Trimming'). Entries include dates (10/2/2025–10/4/2025), event identifiers (e.g., 14V-303), durations (57–720 minutes), costs (e.g., $1,307.35), and classifications (e.g., 'Customer Requested').

196 13.07 4 Reliability 10/4/2025 101H-413 08:52 15:08 376 1,628.47 260 Reliability 10/5/2025 79V-402 16:02 16:49 48 9.51 12 Reliability 10/6/2025 50N-410 08:44 15:21 397 19.85 3 Tree Trimming 10/6/2025 101H-413 09:00 12:39 220 164.68 45 R...

AI summary The text lists multiple incidents with dates, durations, and causes such as Reliability, Tree Trimming, and Capital. Each entry includes a date, incident number, start and end times, duration, and a category indicating the cause. The data highlights various outage events and their classifications.

.65 33 Capital 10/8/2025 96H-411 09:50 13:56 246 28.71 7 Capital 10/9/2025 6W-201 07:25 07:38 13 1.70 8 Capital 10/9/2025 46W-301 09:27 13:55 268 22.32 5 Capital 10/9/2025 99V-312 10:24 12:13 109 19.91 11 Reliability 10/9/2025 127H-411 13:...

AI summary The text presents a table of events with dates, times, durations, and categories such as 'Capital,' 'Reliability,' and 'Switching.' It references the '2025 Performance Standards Report Appendix K Page 21 of 25,' indicating data related to operational performance and standards in a regulatory context.

22.42 21 Reliability 2025 Performance Standards Report Appendix K Page 21 of 25

AI summary This section outlines reliability metrics from the 2025 Performance Standards Report, focusing on system reliability indicators. The text is a section heading within Appendix K, page 21 of 25.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 10/10/2025 40H-305 08:18 11:59 221 25.82 7 Reliability 10/10/2025 40H-305 11:33 11:5...

AI summary The table lists outage events from October 10-15, 2025, detailing start/restore times, durations, customer hours of interruption, and subcauses (e.g., Reliability, Switching, Capital). Outages range from 3 to 423 minutes, with customer hours varying from 1.51 to 375.52, and subcauses linked to infrastructure issues, switching events, and capital-related disruptions.

12V-304 18:09 18:32 22 9.74 26 Reliability 10/15/2025 87W-312 09:00 16:03 423 606.56 86 Reliability 10/15/2025 50W-412 10:26 13:43 196 26.20 8 Reliability 10/15/2025 62N-412 12:46 13:01 15 3.44 14 Switching 10/15/2025 81S-304 13:02 19:50 4...

AI summary The text lists reliability, switching, and planned transmission events with dates, codes, durations, and impact metrics for NS Power, including metrics like customer interruptions and hours. Entries span October 15–16, 2025, with categories such as 'Reliability' and 'Planned Transmission'.

26.93 13 Reliability 10/16/2025 103H-434 14:25 15:01 36 5.38 9 Reliability 10/16/2025 4C-432 16:10 16:35 25 9.41 23 Reliability 10/17/2025 70W-204 05:05 05:21 16 76.35 279 Planned Transmission 10/17/2025 70W-203 05:05 05:21 16 75.76 276 Pl...

AI summary The text lists outage events with dates, durations, and categories (e.g., Reliability, Planned Transmission). Each entry includes timestamps, interruption durations, and customer impact metrics, indicating system performance and maintenance activities.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 10/24/2025 11S-411 14:33 21:06 393 1,106.75 169 Switching 10/24/2025 100C-421 15:59...

AI summary A table listing power outage events from October 24-26, 2025, with details on start/restore times, durations, customer hours interrupted, and causes (e.g., switching, reliability, capital). Outages range from 12 to 422 minutes, affecting 2 to 2,111 customers, with 'Reliability' and 'Capital' as primary subcauses.

22W-313 09:07 11:30 144 4.78 2 Reliability 10/26/2025 22W-313 09:07 11:31 144 7.21 3 Reliability 10/26/2025 57C-426 10:42 13:59 197 279.27 85 Reliability 10/26/2025 126H-311 16:29 17:15 46 419.19 550 Switching 10/27/2025 16W-301 09:52 11:1...

AI summary The text lists events from October 26-29, 2025, categorized under Reliability, Switching, Capital, and Planned Transmission. Metrics include duration, customer impact, and event types, indicating operational performance and infrastructure issues.

9 Reliability 10/29/2025 65V-303 10:17 14:37 261 4.34 1 Reliability 10/29/2025 103W-311 10:23 13:58 215 140.06 39 Reliability 10/29/2025 92H-331 10:30 15:29 299 39.86 8 Tree Trimming 10/29/2025 92H-331 10:30 15:30 300 9.99 2 Tree Trimming...

AI summary The text presents a table of incidents recorded on October 29 and 30, 2025, categorized under 'Reliability,' 'Tree Trimming,' 'Capital,' and 'Switching.' Each entry includes dates, durations, and interruption counts, highlighting reliability challenges and infrastructure-related issues.

291 43.59 9 Reliability 10/30/2025 15S-301 11:12 12:30 78 19.61 15 Reliability 10/30/2025 37N-414 11:48 13:26 98 4.91 3 Capital 10/30/2025 103H-434 17:10 17:27 17 3.33 12 Reliability 10/31/2025 40H-302 09:36 09:48 12 0.98 5 Switching 10/31...

AI summary The text presents a table of events with dates, times, durations, and categories (Reliability, Capital, Switching). Metrics include interruption durations, customer impacts, and event types, suggesting analysis of service reliability, capital projects, and switching incidents. No explicit arguments or claims are discussed.

:19 13:46 327 5.46 1 Reliability 11/3/2025 36W-304 13:48 15:00 72 167.95 140 Switching 11/3/2025 96H-412 14:17 14:59 42 0.70 1 Reliability 11/3/2025 20H-304 14:59 15:00 2 1.15 45 Capital 11/4/2025 103W-311 10:19 10:37 18 5.01 17 Tree Trimm...

AI summary The text presents a table of events with dates, times, durations, and categories such as 'Reliability,' 'Switching,' 'Tree Trimming,' and 'Customer Requested.' It appears to track outage incidents, their causes, and associated metrics, focusing on grid operations and service disruptions.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 11/7/2025 46W-301 12:27 15:43 196 3.27 1 Reliability 11/7/2025 101H-413 13:01 15:38...

AI summary The table lists power outage events with details on dates, affected feeders, outage durations, customer hours interrupted, and causes such as reliability, capital, and tree trimming. Each entry includes start and restore times, duration in minutes, and the number of customers impacted.

/10/2025 13V-303 18:27 19:17 50 206.67 249 Switching 11/12/2025 91W-411 04:06 11:17 431 301.89 42 Reliability 11/12/2025 91W-411 04:06 11:41 456 22.78 3 Reliability 11/12/2025 1W-411 08:41 16:22 461 61.43 8 Tree Trimming 11/12/2025 57C-422...

AI summary A table listing events with dates, times, durations, and categories such as 'Reliability,' 'Capital,' and 'Tree Trimming.' The data highlights interruptions, expenditures, and operational activities related to Nova Scotia Power's grid management and infrastructure.

13 16 Reliability 11/14/2025 102W-312 09:08 09:52 44 21.24 29 Capital 11/14/2025 102W-312 09:53 12:35 162 8.10 3 Capital 11/14/2025 21W-311 10:11 13:25 195 12.98 4 Reliability 11/14/2025 62N-414 11:07 11:26 19 2.83 9 Reliability 11/15/2025...

AI summary The text presents a table of events with dates, times, and metrics categorized under 'Reliability,' 'Capital,' and 'Switching.' Entries include durations, interruption frequencies, and associated numbers, likely related to utility operations and infrastructure management in Nova Scotia.

11:20 34 3.95 7 Reliability 11/17/2025 62N-415 10:46 11:44 58 13.63 14 Reliability 11/17/2025 73W-411 11:30 12:47 77 3.84 3 Reliability 11/17/2025 62N-415 12:45 14:07 82 8.19 6 Reliability 11/17/2025 83V-303 15:36 22:15 398 46.46 7 Reliabi...

AI summary The text contains a series of timestamped entries with numerical data categorized under 'Reliability,' 'Switching,' and 'Capital.' These entries appear to document events or incidents, though no explicit discussion of regulatory themes, arguments, or entities is present.

iability 11/20/2025 3S-307 10:04 11:24 80 12.06 9 Reliability 11/20/2025 57S-402 10:37 14:16 219 3.65 1 Reliability 11/20/2025 92H-331 11:41 13:28 106 17.74 10 Reliability 11/20/2025 50W-411 15:38 17:10 92 23.01 15 Reliability 11/21/2025 1...

AI summary The text presents a table of outage events with dates, durations, customer impacts, and categories (e.g., Reliability, Switching, Customer Requested). Metrics include interruption duration, number of affected customers, and event types, focusing on reliability and service disruption data.

9.91 26 Reliability 2025 Performance Standards Report Appendix K Page 24 of 25

AI summary A section heading from the 2025 Performance Standards Report Appendix K, referencing reliability metrics. The text provides no substantive content beyond the heading and page reference.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 11/27/2025 99H-311 10:13 10:46 32 3.74 7 Reliability 11/27/2025 62N-416 10:26 12:25...

AI summary The table lists power interruption events with details on start/restore times, durations, customer impact, and causes (e.g., reliability, capital, tree trimming). Data highlights interruptions affecting 7–101 customers, durations ranging from 14–205 minutes, and subcauses like reliability and capital expenditures. NS Power likely faces scrutiny over service reliability and capital-related outages.

110.69 34 Reliability 12/2/2025 23H-301 12:34 14:04 90 8.96 6 Reliability 12/3/2025 50W-412 08:46 09:36 50 12.46 15 Reliability 12/3/2025 102W-311 14:09 14:40 31 593.86 1,152 Switching 12/3/2025 9C-304 20:34 21:42 68 1.13 1 Switching 12/4/...

AI summary The text presents a table of service interruption events from December 2025, including dates, circuit identifiers, timeframes, durations, customer impacts, and categories (e.g., Reliability, Switching, Tree Trimming). It highlights metrics such as interruption frequency, duration, and customer hours affected, indicating operational challenges in grid reliability and maintenance.

886 Switching 12/11/2025 46W-301 09:36 09:43 7 48.78 426 Reliability 12/11/2025 46W-301 09:36 13:11 216 833.96 232 Reliability 12/11/2025 23H-304 09:49 11:57 128 57.55 27 Capital 12/11/2025 92H-331 09:57 10:03 6 6.20 67 Reliability 12/11/2...

AI summary The text presents a table of events with dates, durations, and categories (e.g., Reliability, Capital, Switching). Metrics include interruption durations, costs, and event types, likely related to power system performance and infrastructure projects on specific dates in December 2025.

Start Time (24- Restore Time (24- Duration Customer Hours of Customers Date Feeder CEA Subcause hour clock) hour clock) (Minutes) Interruption Interrupted 12/14/2025 88W-322 08:08 10:27 139 436.37 189 Capital 12/14/2025 15N-403 08:34 09:21...

AI summary The table presents power interruption data from December 14-17, 2025, including start/restore times, durations, customer hours of interruption, and affected customers. Causes include capital projects, reliability issues, switching events, and planned transmission work, highlighting system reliability and operational challenges.

.71 1,271 Capital 12/16/2025 77V-401 17:55 18:20 25 258.45 611 Switching 12/17/2025 15N-403 08:07 14:35 388 1,253.56 194 Capital 12/17/2025 113H-434 08:53 10:55 122 10.21 5 Reliability 12/17/2025 70W-313 08:55 14:43 348 92.77 16 Reliabilit...

AI summary The text presents a table of outage events with dates, durations, and categories such as 'Capital,' 'Switching,' and 'Reliability,' along with associated metrics like customer interruptions and costs. The data appears to track service disruptions and their classifications.

19 3.84 12 Tree Trimming 12/21/2025 7N-301 09:59 10:15 15 393.98 1,545 Switching 12/21/2025 87H-313 10:41 11:40 59 7.92 8 Reliability 12/21/2025 37N-412 12:34 13:34 60 422.05 421 Tree Trimming 12/22/2025 57S-402 12:31 12:46 15 0.97 4 Tree...

AI summary The text presents a table of incident records with dates, times, durations, and categories (e.g., Tree Trimming, Switching, Reliability). It is part of the '2025 Performance Standards Report Appendix L' and appears to track operational events or maintenance activities related to utility services.

12:13 102 34.11 20 Reliability 2025 Performance Standards Report Appendix L Page 1 of 4

AI summary The text contains a fragment from a 2025 Performance Standards Report Appendix L, referencing 'Reliability' with numerical values (12:13, 102, 34.11, 20). The content appears to be part of a table or metric summary, but lacks explicit context or discussion of themes.

Appendix L Percentage of Customers Restored Within 48 Hours Major Event Days Date (YYYY-MM-DD) Number of Customers Percentage of Customers Restored in First 48 Restored in First 48 Hours Hours 2017-02-13 51,484 97.61 2017-03-14 44,683 100....

AI summary Appendix L presents data on customer restoration rates during Major Event Days (MEDs) from 2017–2020, showing percentages of customers restored within 48 hours. Most events achieved 100% restoration, though 2019-09-09 had a notable 79.95% restoration rate, indicating variability in service reliability during outages.

2023/01/26 81,868 99.99 2025 Performance Standards Report Appendix L Page 2 of 4 Date (YYYY-MM-DD) Number of Customers Percentage of Customers Restored in First 48 Restored in First 48 Hours Hours 2023/02/04 109,424 100.00 2023/07/21 30,64...

AI summary The document presents performance metrics for customer restoration rates, showing percentages of customers restored within 48 hours across various dates in 2023 and 2025. The average restoration rate is 96.71%, exceeding the 2025 target of 91.98%, though some dates show lower rates (e.g., 94.87% on 2023/09/17).

rget 91.98 2025 Performance Standards Report Appendix L Page 3 of 4 Extreme Event Days Date (YYYY-MM-DD) Number of Customers Percentage of Customers Restored in First 48 Hours Restored in First 48 Hours 2017-12-25 180,396 98.41 2018-01-04...

AI summary The report presents performance metrics for Extreme Event Days, showing the percentage of customers restored within 48 hours, with an average of 85.45% and targets set at 78.38% for 2025 and 2026.

arget 78.38 2025 Performance Standards Report Appendix L Page 4 of 4 Significant Event Day (Following a Major or Extreme Event Day) Date (YYYY-MM-DD) Number of Customers Percentage of Customers Restored in First 48 Hours Restored in First...

AI summary The 2025 Performance Standards Report Appendix L details restoration performance after Significant Event Days, showing 96.19% average customer restoration within 48 hours (with 5.65% standard deviation). The 2025 target is 95.05%, slightly below the historical average, indicating a focus on reliability and service recovery benchmarks.

Appendix M Page 1 of 2 Appendix M Summary of Performance Standards Results by Category 1. Reliability Standards 2025 Results Standard Target 2025 Result Outcome SAIDI ≤4.29 4.79 Not Achieved SAIFI ≤2.05 1.57 Achieved 85S-401: 20.91 Not Ach...

AI summary The 2025 Reliability Standards results show SAIDI (4.79) exceeded the target (≤4.29), while SAIFI (1.57) was achieved. Some circuit-level metrics like CKAIDI (≤16.54) were met, but others like 57W-402 (4.77) and 91W-411 (4.71) missed their targets. Overall, mixed outcomes highlight challenges in meeting system reliability benchmarks.

2.3 days Achieved ≤3.2 days. 2025 Performance Standards Report Appendix M Page 2 of 2 Standard Target 2025 Result Outcome Service Installation Line Extension <10 Poles: ≤6.2 5.1 days Achieved days. Service Installation Line Extension ≥ 10...

AI summary The 2025 Performance Standards Report details NS Power's achievements in service installation and adverse weather response. Service installation targets for line extensions were met, with results below the target days. Adverse weather response included timely EOC notifications and high call answer rates during outages, both meeting their respective targets.

Achieved Rate December 19-20: 93.3% Care Centre during severe outage events. Polite Disconnects 10% or less annually. 3.6% Achieved ETR Updates ETR updates provided Target Met Achieved without delay without delay. Extreme Event Days: ≥78.3...

AI summary The document outlines performance metrics achieved by NS Power in 2025, including 93.3% rate achievement during severe outages, 10% or less annual polite disconnects (3.6% achieved), and 100% ETR updates provided without delay. It details restoration targets for Major (MED), Extreme (EED), and Significant Event Days (SED), with achieved percentages exceeding thresholds. Reports for events impacting ≥30,000 customers were filed within required timelines.

2025 Performance Standards Report Appendix N Page 1 of 1 Appendix N Comparison of Major and Extreme Event Days in 2025 Summary of Peak Wind Gusts by Major or Extreme Event Day 2025 Region December December 3 (MED) 19-20 (EED/MED) Valley 48...

AI summary Appendix N compares peak wind gusts during Major Event Days (MED) and Extreme Event Days (EED) in December 2025 across Nova Scotia regions. Appendix O outlines the Board's approval of 2022–2026 reliability standards, including SAIFI, SAIDI, CKAIFI, and CKAIDI metrics for system performance.

ex (“SAIFI”) (ii) System Average Interruption Duration Index (“SAIDI”) (iii) Circuit Average Interruption Frequency Index (“CKAIFI”) (iv) Circuit Average Interruption Duration Index (“CKAIDI”) Exclusions: These reliability performance metr...

AI summary The document outlines reliability performance metrics (SAIFI, SAIDI, CKAIFI, CKAIDI) for NS Power, specifying exclusions during major/extreme event days (MEDs/EEDs) and adverse weather. Exclusions follow IEEE 1366-2012 standards, with compliance assessed annually. Hurricane Dorian's outage data is excluded from threshold calculations.

ce Standards Report Appendix O Page 2 of 8 Standards 1 & 2 – SAIFI and SAIDI SAIFI and SAIDI are system-wide reliability metrics, commonly used by electric power utilities. Metrics: • SAIFI measures the average number of times that a syste...

AI summary The document explains SAIFI and SAIDI as reliability metrics for NS Power, detailing their formulas and benchmarks. Targets are set using a 5-year rolling average plus 1 standard deviation, with annual targets requiring improvement or maintenance of prior year levels. Figure 1 outlines 2026 targets based on 2021–2025 historical data.

ev Target d Target Target Avg SAIDI 5.23 5.16 5.21 5.26 4.79 5.13 0.17 4.29 5.30 4.29 SAIDI 2.27 2.19 2.18 1.97 1.57 2.04 0.25 2.05 2.29 2.05 The SAIDI and SAIFI values beginning January 1, 2026 will reflect the updated MED thresholds and...

AI summary Updates to SAIDI/SAIFI metrics starting 2026 reflect new MED thresholds, removing a 24-hour post-event period. CKAIFI/CKAIDI address circuit-level reliability issues not captured by system-level metrics.

captured by system level performance metrics (i.e., SAIDI and SAIFI). Metrics: 2025 Performance Standards Report Appendix O Page 3 of 8 CKAIFI is related to the frequency of interruptions experienced, which may be tied to a given circuit....

AI summary The text defines CKAIFI and CKAIDI metrics for evaluating power interruption frequency and duration per circuit. It outlines benchmarks where circuits in the worst 5% for two consecutive years are labeled 'problem circuits,' and those persisting for three years are 'chronic circuits.' Chronic circuits exceeding average values plus two standard deviations trigger penalties.

Figure 2 – CKAIDI and CKAIFI 2026 Problem Feeders Metric Feeders CKAIDI 76V-301 85S-401 CKAIFI 91W-411 57W-402 15N-401 If any of the problem circuits identified above are among the worst 5 percent of the company’s circuits for the third co...

AI summary The document outlines performance standards for identifying chronic circuits based on CKAIDI/CKAIFI metrics and adverse weather response criteria. NS Power will compare chronic circuit performance against industry benchmarks in 2026, while the Board has mandated annual compliance checks for metrics like outage restoration times, customer notifications, and ETR updates during severe weather events.

dards (vi) Outage Report for adverse weather events impacting ≥ 30,000 customers. Compliance: NS Power’s compliance across all adverse weather response metrics will be assessed on an annual basis. Standard 5 – Customer notification of an o...

AI summary NS Power must report outages from adverse weather events affecting ≥30,000 customers annually and notify all customers of severe weather within 4 hours of opening its Emergency Operations Centre. Call centre performance is measured by the percentage of calls answered within 45 seconds by representatives.

mation of the metric if a customer chooses to speak to a customer representative. Alternatively, if a customer chooses an automated system, those calls are included in the calculation of this metric. 1 MEDs and EEDs are defined using the I...

AI summary The document outlines performance standards for NS Power's customer service during outages, including benchmarks for call answering rates during severe events (MEDs/EEDs), polite disconnect rates, and ETR updates. Metrics exclude Hurricane Dorian data per NSUARB Decision M10279, using IEEE 1366-2012 methodologies.

estore (ETR) updates Metric: The performance standard around estimated restoration times shall aim to promptly provide customers with accurate information based on information available with NS Power. Benchmark: NS Power shall provide ETR...

AI summary NS Power is required to provide accurate Estimated Time of Restoration (ETR) updates without delay. Performance benchmarks for customer restoration within 48 hours of severe weather events are set using historical data (2017–2025) minus one standard deviation, with separate targets for Major Event Days (MEDs), Extreme Event Days (EEDs), and Significant Event Days (SEDs).

SEDs 2017-2025 Average 96.71 85.45 96.19 Standard Deviation 6.13 14.47 5.65 3 For the Board to assess whether ETR updates were provided to customers without delay, as part of its annual reports, NS Power shall submit a compliance statement...

AI summary The document outlines performance standards for outage restoration, customer service metrics, and regulatory reporting requirements. Key metrics include SEDs, MEDs, and EEDs with specific customer restoration targets and CHI thresholds. NS Power must submit compliance statements and outage reports for major events, referencing Matter M09524.

Metric 2017 2018 2019 2020 2021 2022 2023 2024 2025 1 SAIFI ≤2.05 ≤2.05 ≤2.05 ≤2.05 ≤2.05 ≤2.05 ≤2.05 ≤2.05 ≤2.05 1.73 2.00 2.58 2.05 2.27 2.19 2.18 1.97 1.57 2 SAIDI ≤4.29 ≤4.29 ≤4.29 ≤4.29 ≤4.29 ≤4.29 ≤4.29 ≤4.29 ≤4.29 3.40 4.43 5.99 3.9...

AI summary The document presents performance metrics for system reliability, including SAIFI, SAIDI, and CKAIFI, from 2017 to 2025. Targets are shown alongside actual values, with some years exceeding thresholds (e.g., SAIFI in 2019 was 2.58 vs. ≤2.05). Circuit identifiers (e.g., 16V-314) are listed for the worst-performing areas.

4 CKAIDI ≤24.60 ≤20.47 ≤20.51 ≤13.22 ≤17.86 ≤19.81 ≤16.98 ≤19.00 ≤16.54 target (worst 85S-402 (28.25) 85S-401 (67.68) 85S-401 (38.34) 88H-402 67C-411 (39.97) 11S-411 (22.84) 22C-402 (8.11) 91W-411 (31.81) 85S-401 (20.91) 5% of 16V-314 (4.0...

AI summary The text presents performance metrics for grid reliability indicators (CKAIDI) across multiple periods, referencing specific performance standards and matter numbers. It relates to the 2025 Performance Standards Report Appendix P, highlighting system performance targets and historical data comparisons.

2025 Performance Standards Report Appendix P Page 2 of 4 Appendix P Summary of Performance Standards Results Since 2017 Target / Target Met / Target Not Met

AI summary The 2025 Performance Standards Report's Appendix P evaluates performance metrics since 2017, summarizing whether targets were met. It focuses on system reliability indicators and service quality benchmarks under Nova Scotia's utility regulation framework.

Metric 2017 2018 2019 2020 2021 2022 2023 2024 2025 5 Notification of Met Met Met Met Met Met Met Met Met EOC Opening 6 Outage Call ≥85% ≥85% ≥85% ≥85% ≥85% ≥85% ≥85% ≥85% ≥85% Answer Rate 96.0 96.3 (01/4-6) 91.57 (07/21) 97.90 n/a 97.76 (...

AI summary The table presents performance metrics from 2017 to 2025, showing EOC Opening compliance as 'Met' annually and Outage Call Answer Rate targets (≥85% within 45 seconds). Specific call answer rates and dates are noted, including a reference to 'Dorian' (likely Hurricane Dorian in 2019).

86.65 (12/13-16) 12/1) 95.78 (12/23-24) 7 Polite ≤10% ≤10% ≤10% ≤10% ≤10% ≤10% ≤10% ≤10% ≤10% Disconnects 2.26 6.6 6.24 0.18 0.05 3.49 1.61 1.27 3.64 per year 8 ETR Updates Met Met Met Met Met Met Met Met Met without Delay 9 Percentage of...

AI summary The text presents performance metrics for service restoration, including percentages of customers restored within 48 hours during Major Event Days (MED) and Extreme Event Days (EED), alongside ETR (Estimated Time of Restoration) compliance rates. Metrics show varying success rates across different periods, with some days achieving 100% restoration and others falling below thresholds.

17) 98.74 (12/19) EED≥65.3% 99.70 (11/3) 100.00 (12/10) 94.19 (02/04) 98.67 (12/11) n/a 98.41 (12/25) 93.88 (02/05) 97.26 (12/18) EED≥66.30 EED≥68.7 100.00 (02/18) 99.72 (12/19) 99.9 (01/4) 79.82 (09/07) 86.39 (09/26) 99.88 (12/21) 99.9 (1...

AI summary The text presents performance data with percentages and dates, including thresholds for Extreme Event Days (EED) and associated metrics. It reflects reliability indicators, potentially related to power outage frequencies and durations during extreme events.

SED≥95.05% 85.48 (09/30) 9a File outage n/a n/a n/a n/a n/a Met Met Met Met reports within 45 or 75 days 01/07 01/16 SED 02/29 12/3 MED 01/14-15 01/26-28 MED 03/24 12/19-20 EED/MED 01/17-18 02/04-07 MED 12/12 02/04-08 07/21-25 MED 02/18 09...

AI summary The text outlines performance standards related to outage reporting, with metrics indicating compliance rates (SED≥95.05%) and specific dates for meeting targets during Significant Event Days (SED), Major Event Days (MED), and Extreme Event Days (EED). It references deadlines for filing outage reports within 45 or 75 days and associated event periods.

2025 Performance Standards Report Appendix P Page 4 of 4 Appendix P Summary of Performance Standards Results Since 2017 Target / Target Met / Target Not Met

AI summary Summary of performance standards results from 2017 to 2025, detailing which targets were met or not. The report evaluates NSP's adherence to established performance metrics, including SAIFI, SAIDI, and other reliability indicators.

Metric 2017 2018 2019 2020 2021 2022 2023 2024 2025 10 Regular Calls ≥70% ≥70% ≥70% ≥70% ≥70% ≥70% ≥70% ≥70% ≥70% Answer Rate In 30 72.0 73.0 66.67 72.76 75.1 71.1 76.30 81.3% 60.64% Seconds 11 Percentage of ≤2% ≤2% ≤2% ≤2% ≤2% ≤2% ≤2% ≤2%...

AI summary The table presents performance metrics from 2017 to 2025, including call answer rates, bill estimation accuracy, outage notifications, and service connection timelines. Metrics show fluctuations in customer service efficiency, billing accuracy, and service reliability over time, with targets and thresholds indicated for each year.

≤6.2 / 6.01 ≤6.2 / 5.11 <10 Poles ≤31.7 / 12.1 ≤26.9 / 12.2 ≤26.7 / 21.5 ≤25.8 / 14.6 ≤25.8 / 9.70 ≤18.1 / 12.02 ≤18.1 / 14.12 ≤18.1 / 7.52 ≤13.7 / 4.78 ≥10 Poles MED 157,127 165,849 184,972 211,057 210,750 182,510 231,214 251,987 237,489...

AI summary The text presents metrics for Major Event Days (MED), Extreme Event Days (EED), and Significant Event Days (SED), with corresponding Customer Hours of Interruption (CHI) thresholds. Data includes numerical thresholds and counts, indicating performance metrics related to power system reliability and outage management.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Consumer Advocate Information Requests NON-CONFIDENTIAL 1 Request IR-1: 2 3 Reference: Reduction in outages caused by tree strikes. 4 5 Please explain the extent to w...

AI summary NSPI attributes the 2025 reduction in tree strike outages to both favorable weather and $45M in vegetation management spending (2024-2025). They emphasize that without ongoing trimming efforts, even good weather would not prevent higher outages, citing the Five-Year Reliability Plan's cumulative benefits.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Consumer Advocate Information Requests NON-CONFIDENTIAL 1 Request IR-3: 2 3 With regard to notification of an anticipated severe weather event: 4 5 (a) Please describ...

AI summary NSPI's response to IR-3 details its reliance on third-party weather forecasts (primarily from Environment and Climate Change Canada) for severe weather planning, regional forecast frequency adjustments during emergencies, and supplementary guidance from meteorologists. It emphasizes forecast accuracy assessments and steps taken in 2025 based on prior experiences.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Consumer Advocate Information Requests NON-CONFIDENTIAL 1 Company has access to the necessary pre-event forecasts to make informed and effective 2 decisions. As descr...

AI summary NSPI asserts it uses multiple weather forecast sources, including ECCC data, to plan for adverse weather events. It emphasizes forecast complexity and probabilistic nature, noting discrepancies don't necessarily reflect forecast quality. NSPI follows documented storm response processes and conducts post-event critiques for continuous improvement.

1 Request IR-2: 2 3 Reference: SAIDI and SAIFI Standards, p. 47. 4 5 Preamble: Target SAIDI was ≤ 4.29 and the result was 4.79. SAIDI has now missed target 6 in multiple recent years. 7 8 (a) Please identify any structural factors preventi...

AI summary The response to IR-2 addresses concerns about SAIDI missing targets despite capital investments, attributing delays to long-term reliability improvements. NSPI explains that SAIFI improvements stem from outage reduction strategies, while SAIDI lags due to the time required for duration metrics to reflect systemic changes.

eted device 28 replacements reducing equipment failure, as well as the use of protective devices to limit 29 the overall number of customers impacted by outages should they occur. 30 Date Filed: May 29, 2026 NSPI (IG) IR-2 Page 1 of 2 2025...

AI summary NSPI outlines strategies to reduce outages, such as equipment replacement and infrastructure improvements, which positively impact SAIDI and CKAIDI metrics. However, external factors like weather, regulatory processes, and customer cooperation may delay implementation of these initiatives.

1 Request IR-3: 2 3 Reference: Page 9, lines 2-5. 4 5 “NS Power is already seeing positive results from the $206 million 6 invested in the first year of the reliability plan. There was a 19 percent 7 reduction in outages due to trees comin...

AI summary The document requests NSPI to explain how its reliability plan investments correlate with reduced outages and SAIDI improvements. It asks for analysis methodology, quantitative links between projects and reliability metrics, and data supporting 19% and 18% outage reduction claims. The Five-Year Reliability Plan's alignment with SAIDI trends is a key focus.

the calculations and supporting data underlying the reported 19 31 percent reduction in outages due to tree contact and 18 percent reduction in outages 32 due to equipment failures. Date Filed: May 29, 2026 NSPI (IG) IR-3 Page 1 of 3 2025...

AI summary NSPI reports a 19% reduction in outages from tree contact and 18% reduction from equipment failures in its 2025 Annual Performance Standards Report (NSEB M12784), responding to information requests from the Industrial Group.

1 Response IR-3: 2 3 (a) The analysis is based on Figure 28 of the 2025 Report showing the "SAIDI Improvement 4 Projection" trajectory. The Plan does not prescribe specific interim annual targets for 2025, 5 2026, 2027, or 2028; rather, it...

AI summary NS Power claims 2025 SAIDI of 4.79 aligns with the Five-Year Reliability Plan, citing improvements from the baseline and previous years. They did not use quantitative models to link specific projects to SAIDI/SAIFI improvements.

and approved within the three main categories of the Five-Year Reliability plan, NS Power 26 will continue to spend within the approved categories as approved in previous regulatory 27 filings. 28 29 (c) The improvement calculations are ba...

AI summary NSPI will adhere to the Five-Year Reliability plan's approved spending categories. The 2025 Annual Performance Standards Report (NSEB M12784) shows an 18% reduction in equipment failure outages and 19% reduction in tree contact outages compared to 2024, with data visualized in Figures 29 and 30.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL 1 Request IR-4: 2 3 Reference: Page 52, Figure 29. 4 5 Reference: 2026 ACE Plan (M12619), N-6, NSPI (NSEB) RIR...

AI summary NSPI's 2025 Annual Performance Standards Report (NSEB M12784) addresses an Industrial Group request (IR-4) regarding Figure 29's alignment with prior data, the 40% adverse weather factor, and outage reduction reasons. NSPI refers to NSEB IR-28 for details.

le to vegetation management and/or other reliability investments 26 from the portion attributable to differences in weather. 27 28 Response IR-4: 29 30 (a) Please refer to NSEB IR-28. Date Filed: May 29, 2026 NSPI (IG) IR-4 Page 1 of 2 202...

AI summary NSPI responds to an information request regarding reliability investments and weather-related adjustments, referencing NSEB IR-28. The context involves the 2025 Annual Performance Standards Report (NSEB M12784) and NSPI's responses to industrial group inquiries.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL 1 (b) N/A. For clarification, the annual tree contact outages shown in Figure 29 do not include 2 the 40 percen...

AI summary NSPI clarifies that annual tree contact outages exclude a 40% weather adjustment factor, estimating it via technician feedback. Outage reductions in 2025 resulted from favorable weather and $45M in vegetation management investments. NSPI emphasizes ongoing reliability improvements through the Five-Year Reliability Plan.

anagement plan laid 20 out in the Five-Year Reliability Plan will provide ongoing cumulative benefits as more 21 corridors are widened and higher risk trees are trimmed and managed. Date Filed: May 29, 2026 NSPI (IG) IR-4 Page 2 of 2 2025...

AI summary NSPI outlines that the Five-Year Reliability Plan's management strategies, including corridor widening and tree trimming, will deliver cumulative reliability benefits. The text references NSPI's responses to an industrial group information request and cites the 2025 Annual Performance Standards Report (NSEB M12784).

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL 1 Request IR-5: 2 3 Reference: Page 52, Figure 30. 4 5 Reference: 2026 ACE Plan (M12619), N-6, NSPI (NSEB) RIR-...

AI summary NSPI responds to industrial group requests regarding data discrepancies in outage metrics, explaining reductions in outage events and increased customer outage hours. The response attributes 2025 outage reductions to targeted investments and reliability improvements, while noting the need to differentiate weather impacts from infrastructure upgrades.

8. 28 29 (b) With respect to outage event counts attributable to equipment failure, the reduction in 30 overall numbers is largely a result of NS Power’s ongoing, targeted investments in Date Filed: May 29, 2026 NSPI (IG) IR-5 Page 1 of 3...

AI summary The document references NSPI's efforts to reduce outage events due to equipment failure through targeted investments, as outlined in the 2025 Annual Performance Standards Report (NSEB M12784) and NSPI's responses to information requests. The reduction in outages is attributed to ongoing infrastructure improvements.

1 equipment replacements and upgrades, as well as new, modern standards implemented in 2 recent years. By replacing deteriorated assets with more robust equipment prior to failure, 3 fewer in-service failures are expected and observed in t...

AI summary The text discusses how equipment upgrades have reduced failure events and customer interruptions, but in 2025, the primary factor affecting customer hours of interruption was restoration time for large outages. Event count and location impact were lower, but complex restorations prolonged durations.

ance in 2025 was 24 largely attributable to the third factor, the restoration time. In particular several large customer 25 count events with challenging restorations were responsible for a large fraction of overall CHI. 26 The largest 5 e...

AI summary The 2025 CHI was driven by prolonged restoration times from complex outages, with top equipment failure events accounting for over 55% of customer interruption hours. NSPI attributes increased conductor failures to infrastructure stress from high wind hours, not direct weather correlation, as noted in the 2026 ACE Plan. Weather impacts were minimal compared to equipment-related causes.

ute the outage events to a storm event.Comparing 10 Performance Standards outage data sets with All-In performance with respect to Equipment 11 Failure outages shows minimal impact. Date Filed: May 29, 2026 NSPI (IG) IR-5 Page 3 of 3 2025...

AI summary NSPI's 2025 Annual Performance Standards Report (NSEB M12784) compares outage data with All-In performance metrics, concluding minimal impact from equipment failure outages. The filing addresses industrial group information requests and includes performance standards analysis.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL 1 Request IR-6: 2 3 Reference: CKADI and CKAIFI Standards – Figures 35 and 36, p. 59-60. 4 5 Preamble: NSPI ide...

AI summary NSPI confirms feeders 85S-401 and 57W-402 now qualify as 'chronic' under NSEB standards. NSPI outlines action plans including vegetation management, equipment upgrades, and grid modernization (e.g., FLISR) to address reliability issues, with implementation extending into 2026. This responds to Industrial Group requests regarding performance standards.

and targeted reliability improvements. In addition, this feeder was impacted by loss- 30 of-supply events from the L-5532 transmission line; planned investments on L- Date Filed: May 29, 2026 NSPI (IG) IR-6 Page 1 of 2 2025 Annual Performa...

AI summary NSPI outlines planned infrastructure investments on transmission lines (L-5532) and feeders (57W-402, 91W-411) to reduce outages through vegetation management, equipment upgrades, and system improvements. These efforts aim to enhance reliability by addressing root causes of loss-of-supply events.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL 1 Request IR-7: 2 3 Reference: Section 4.0 Customer-Level Reliability Data (CEMI/CELID), p. 86. 4 5 Preamble: N...

AI summary NSPI asserts that CEMI/CELID metrics are informational only, not enforceable standards, as enforcing them could divert resources from system-level reliability improvements (SAIFI, SAIDI). Existing metrics already focus on majority customer experience, while CEMI/CELID might incentivize inefficient projects.

of customers experience reliability (on the system and within a feeder respectively) and 29 investments to improve those metrics result in benefit to the highest number of customers. 30 Date Filed: May 29, 2026 NSPI (IG) IR-7 Page 1 of 2 2...

AI summary NSPI argues that CKAIFI and CKAIDI metrics overlap with existing CEMI and CELID metrics, which already capture local customer reliability at the circuit level. Adding CEMI and CELID would create duplication, as circuit-level performance metrics sufficiently address reliability concerns.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL 1 Request IR-9: 2 3 Reference: Appendix I and Appendix K. 4 5 (a) For each feeder that shows zero or missing CK...

AI summary NSPI responds to an information request regarding performance standards, clarifying that planned outages are excluded from CKAIFI/CKAIDI calculations, all feeders were energized, and tracking continues even with missing data. Excluded outage events are detailed in an attachment.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL 1 Request IR-10: 2 3 Reference: Appendix I and Appendix K 4 5 (a) For purposes of this IR, and assuming all out...

AI summary NSPI responds to an information request (IR-10) regarding recalculating SAIDI and SAIFI metrics for the 2025 Annual Performance Standards Report, clarifying that feeders exclude certain outages (MEDs, EEDs, planned) and providing all-in results including these outages. The response emphasizes methodological distinctions between reported and recalculated metrics.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL 1 2 Year SAIDI SAIFI 2019 11.74 4.52 2020 6.57 2.71 2021 5.6 2.56 2022 74.87 5.82 2023 23.03 4.97 2024 6.34 2.7...

AI summary NSPI's 2025 Annual Performance Standards Report (NSEB M12784) presents SAIDI and SAIFI metrics from 2019-2025, showing significant fluctuations, including a spike in 2022 (SAIDI 74.87). The report responds to industrial group information requests and was filed on May 29, 2026.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 Request IR-1: 2 3 Please provide data on all outage events in 2025, as an Excel file, including the same 4 information pr...

AI summary NSPI responded to NSEB's IR-1 request by providing outage data for 2025, including planned/unplanned events in Excel format. The response references Attachment 1, filed electronically on May 29, 2026, as part of the 2025 Annual Performance Standards Report (NSEB M12784).

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-2: 2 3 (a) How does the utility currently evaluate transmission system reliability to supp...

AI summary NSPI responds to NSEB's inquiry about transmission system reliability evaluation, stating that customer outages from transmission interruptions are coded as Loss of Supply and factored into reliability metrics (SAIFI/SAIDI). NSPI references the 2025 Annual Performance Standards Report as the most recent analysis of transmission system impacts on reliability.

NSPI (NSEB) IR-2 Page 1 of 1 2025 Annual Performance Standards Report (NSEB M12784 NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-3: 2 3 Has the utility conducted any statistical analysis over...

AI summary NSPI responded to NSEB's IR-3 request, stating no statistical analysis links investments to customer satisfaction, operating costs, or reliability. NSPI argues customer satisfaction's complexity and focuses on direct reliability metrics (SAIDI, SAIFI) instead of formal statistical methods.

direct, 29 observable reliability performance metrics (SAIDI, SAIFI, CKAIDI, 30 CKAIFI) that directly correlate with customer experience of service Date Filed: May 29, 2026 NSPI (NSEB) IR-3 Page 1 of 4 2025 Annual Performance Standards Rep...

AI summary The document references observable reliability performance metrics (SAIDI, SAIFI, CKAIDI, CKAIFI) tied to customer service experience, submitted by NSPI in response to NSEB information requests under the 2025 Annual Performance Standards Report (M12784).

1 continuity. Regardless, NS Power engages with customers and stakeholders 2 through community meetings, elected official meetings, and reliability 3 roadshows to address customer reliability concerns. 4 5 • Decreased Operating Costs 6 7 •...

AI summary NS Power emphasizes community engagement to address reliability concerns but admits it lacks comprehensive analysis showing reliability investments reduce operating costs. While individual projects like FLISR show avoided costs, no enterprise-wide aggregation exists. Reliability, not cost-cutting, is the primary goal of the Five-Year Reliability Plan, focusing on future cost prevention rather than current budget reductions.

1 • Additionally, the Five-Year Reliability Plan explicitly increases vegetation 2 management operating expenditures (an additional $45 million annually in 3 distribution and transmission tree trimming and right-of-way work planned 4 for 2...

AI summary NS Power's Five-Year Reliability Plan includes increased vegetation management costs ($45M annually) and acknowledges external factors (labor, weather, inflation) drive operating costs. The company admits it has not conducted formal statistical analysis to link reliability investments to performance metrics like SAIDI/SAIFI, relying instead on qualitative risk assessments.

ts. The Company relies on: 25 • Year-over-year outage cause comparisons 26 • Circuit-level risk rating (leading and lagging indicators of condition) 27 • Qualitative assessment of directional consistency between 28 investment programs and...

AI summary NSPI explains that reliability performance is influenced by complex variables like weather and multi-year investment planning. It emphasizes a risk-based asset management framework over statistical models to avoid misleading correlations, citing NSEB M12784 as the referenced proceeding.

1 Request IR-4: 2 3 The Board understands that the System Average Interruption Frequency Index (SAIFI) 4 denominator is the number of customers. There has been an increase of 32,136 customers 5 from 2021 to 2025. Out of the total 32,136 cu...

AI summary The Nova Scotia Energy Board (NSEB) requests clarification on how the utility measures SAIFI performance with changing customer counts and seeks SAIFI percentage changes from 2021 to 2025. The utility explains SAIFI is normalized by customer volume for fair comparisons and provides a table showing SAIFI values and year-over-year changes from 2020 to 2023.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-5: 2 3 Since 2020 through 2025, please provide the total number of planned outages along w...

AI summary NSPI provided data on planned outages and Customer Hours of Interruption (CHI) from 2020–2025, noting increases due to reliability-focused work and customer requests. Outage numbers rose sharply in 2023 (1,951 events) before declining slightly in 2024–2025. NSPI emphasized safety and minimizing customer impact during outages.

1 Request IR-7: 2 3 Page 9 of the report notes the following: 4 5 NS Power is already seeing positive results from the $206 million 6 invested in the first year of the reliability plan. There was a 19 percent 7 reduction in outages due to...

AI summary NS Power reports a 19% reduction in tree-related outages and 18% reduction in equipment failure outages since 2021, attributing improvements to the reliability plan's $206 million investment. The request seeks detailed data on distribution lines, outages, vegetation management, and reliability projects across four regions.

rienced, and the total 31 customer hours of interruptions, reported separately for distribution lines that 32 require vegetation management and those that do not. Date Filed: May 29, 2026 NSPI (NSEB) IR-7 Page 1 of 3 2025 Annual Performanc...

AI summary The document references NSPI's 2025 Annual Performance Standards Report (NSEB M12784) and mentions customer interruption data, distinguishing between distribution lines requiring vegetation management and those that do not. It highlights metrics related to service reliability and regulatory compliance.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 (e) A breakdown of total substations, including primary and secondary voltage level, 2 number of cust...

AI summary NSPI provides data on substation performance, outage causes, reliability projects, and customer satisfaction metrics in response to NSEB's information requests. The response includes customer numbers by region (2021-2025), outage cause percentages, reliability project expenditures, and references to attachments and the Annual Power Line Technician Report.

236 6,896 1,255 8,388 Metro 35 2,209 3,431 5,674 Grand Total 784 15,431 12,181 28,396 Total Distribution Line Length (Km) Year Cape Breto Metro Northeast West Province 2020 5,552 5,413 8,408 8,185 27,558 2021 5,584 5,671 8,499 8,185 27,939...

AI summary The text presents statistical tables showing distribution line lengths (in kilometers) and outage counts by region (Cape Breton, Metro, Northeast, West) and year (2020–2025) across Nova Scotia. Data highlights trends in infrastructure expansion and system reliability over time.

766 2,821 10,746 2024 2,265 2,504 2,437 2,616 9,822 2025 2,077 2,334 2,266 2,445 9,122 Total Customer Hours of Interruption Year Cape Breto Metro Northeast West Province 2020 488,743 604,071 445,163 517,185 2,055,162 2021 894,488 808,742 4...

AI summary The text presents tables with metrics including customer interruption hours by region and year (2020–2025) and unspecified numerical data for 2024–2025. It references the '2025 Annual Performance Standards Report' by the Nova Scotia Energy Board (NSEB), indicating a focus on system reliability and performance benchmarks.

Customer Hours of Interruption Region Year Unknown Loss of Supply Tree Contacts Lightning Failed Equipment Adverse Weather Adverse Environment Human Element Foreign Interference Cape Breton 2020 1.49% 11.09% 24.83% 0.09% 28.57% 18.64% 1.09...

AI summary The table presents customer hours of interruption data for Cape Breton and Metro regions from 2020 to 2025, detailing percentages attributed to causes like tree contacts, lightning, adverse weather, and equipment failure. It highlights trends in interruption distribution across years and regions.

Event Count Region Year Unknown Loss of Supply Tree Contacts Lightning Failed Equipment Adverse Weather Adverse Environment Human Element Foreign Interference Cape Breton 2020 11.43% 0.55% 14.72% 1.45% 41.81% 11.65% 1.66% 0.17% 16.55% Cape...

AI summary The table presents outage causes in Cape Breton and Metro regions (2020-2025), showing 'Unknown Loss of Supply' and 'Adverse Weather' as leading factors. Data highlights fluctuating percentages for causes like 'Human Element' and 'Foreign Interference' across years and regions.

2024 17.65% 0.88% 17.05% 2.48% 26.72% 7.51% 0.68% 0.60% 26.44% Metro 2025 31.53% 1.11% 13.20% 0.39% 26.52% 3.13% 0.43% 0.64% 23.09% Northeast 2020 10.88% 1.37% 18.13% 7.25% 36.53% 5.04% 0.75% 0.44% 19.64% Northeast 2021 15.95% 0.65% 23.02%...

AI summary The data presents regional SAIFI (System Average Interruption Frequency Index) metrics for 2020-2025 across Metro, Northeast, and West areas, showing fluctuating outage frequencies. Northeast regions consistently report higher SAIFI values compared to other regions, with significant year-over-year variations.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 Request IR-8: 2 3 Page 9 of the report states: 4 5 “NS Power is already seeing positive results from the $206 million 6 i...

AI summary The NSEB requests NSPI to clarify if outage reduction figures (19% for tree contact, 18% for equipment failures) exclude MEDs and EEDs, and to provide detailed data and yearly outage numbers from 2020 to 2025 for these categories.

NSPI (NSEB) IR-8 Page 1 of 4 2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 (ii) If confirmed: 2 3 (A) Please provide the underlying outage data upon which these 4 calc...

AI summary NSPI confirms that its performance standards reliability metrics exclude MEDs and EEDs. It acknowledges a typographical error in reporting an 18% reduction in equipment failure outages (corrected to 14%) between 2024-2025. The response requests specific outage data and clarifies discrepancies in reported figures.

Ds and EEDs. However, as noted in part (iii) below, the percentage improvement in 26 event count for failed equipment originally quoted was a typographical error. 27 28 (i) N/A 29 30 Date Filed: May 29, 2026 NSPI (NSEB) IR-8 Page 2 of 4 20...

AI summary NSPI provides data on outage event counts for Tree Contacts and Failed Equipment between 2024 and 2025, showing -19% and -14% reductions respectively. Tables detail historical event counts from 2020-2025. A typographical error in part (iii) is noted but not elaborated.

Year CI CHI CAIDI 2020 228,662 509,709 2.23 2021 240,262 680,499 2.83 2022 246,830 758,744 3.07 2023 210,681 686,530 3.26 2024 259,071 770,960 2.98 2025 214,341 548,590 2.56 1 2 (b) Period Year 1 CHI Year 2 CHI % Change 2020-2025 509,709 5...

AI summary The text presents outage performance data for NS Power from 2020 to 2025, including metrics like CI (Customer Interruptions), CHI (Customer Hours of Interruption), and CAIDI (Customer Average Interruption Duration Index). It highlights trends and changes in customer interruptions and outage durations, particularly for Tree Contact-related outages.

1 Request IR-10: 2 3 Page 9 of the report, when discussing the Five-Year Reliability Plan, states: 4 5 The commitment to the Plan, included in NS Power’s 2026 Annual 6 Capital Expenditure (ACE) Plan, will help continue improving 7 reliabil...

AI summary NS Power balances low rates with reliability improvements through stakeholder collaboration, Board approvals of ACE Plans, risk-based prioritization, and performance tracking. Rate impact analysis involves revenue requirement calculations for capital projects and aggregate costs addressed via General Rate Applications, rather than individual project-specific analyses.

ividual reliability projects; 31 instead, aggregate revenue requirements (including all reliability program costs) 32 are addressed through General Rate Applications. Date Filed: May 29, 2026 NSPI (NSEB) IR-10 Page 1 of 2 2025 Annual Perfo...

AI summary NSPI explains that aggregate revenue requirements, including reliability program costs, are addressed through General Rate Applications (GRA), not individual projects. The 2026-2027 GRA incorporates the Five-Year Reliability Plan's cumulative rate impact. Most reliability investments are essential for meeting performance standards, with revenue analysis informing alternatives but not solely determining decisions.

1 Request IR-11: 2 3 Page 9 of the report states: 4 5 “NS Power is already seeing positive results from the $206 million 6 invested in the first year of the reliability plan.” 7 8 Please provide the five-year average outage frequency and d...

AI summary The request asks for five-year outage metrics (SAIDI/SAIFI) for areas where $206M was invested in NS Power’s reliability plan. NS Power responds that it cannot track performance by specific investment areas but provides feeder-level data (CKAIFI/CKAIDI) from Appendix I of the 2025 Performance Standards report, noting benefits may take years to manifest.

of multiple investments on NS Power’s system is also not necessarily captured at this local 27 level. Furthermore, depending on the scale of the investment, the location of the intervention, and Date Filed: May 29, 2026 NSPI (NSEB) IR-11 P...

AI summary NS Power argues that investments in reliability may not directly improve SAIFI/SAIDI metrics as they prevent future outages rather than addressing existing ones. The company emphasizes risk mitigation strategies combine lagging (outage data) and leading (inspection/vegetation) indicators, with reliability improvements reflected in long-term planning rather than immediate performance metrics.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 Request IR-12: 2 3 Page 10 of the report states: 4 5 “Targeted reliability work on 46 priority feeders across the provinc...

AI summary The NSEB requested NSPI to provide data on outages caused by equipment failure (excluding MEDs and EEDs) from 2020–2025, including customer interruptions, interruption hours, and CAIDI. NSPI also requested expenditure data on capital spending related to T&D equipment failure from 2019–2025, as part of the 2025 Annual Performance Standards Report (NSEB M12784).

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 Response IR-12: 2 3 (a) Performance standards data for outage events coded as caused by equipment failure for 4 years 202...

AI summary NSPI provides 2020-2025 performance data on outage events attributed to equipment failure, including metrics like customer interruptions (CI), customer hours of interruption (CHI), and CAIDI (SAIDI/SAIFI). CHI increased by 11.4% from 2020-2025 but declined by 9.3% from 2024-2025. Expenditures for unplanned equipment replacement (D005 routine) are detailed.

ding and lagging risk indicators, integrates performance 29 metrics like CKAIDI and CKAIFI, and provides assurance that capital investments are 30 delivering the intended outcomes. Date Filed: May 29, 2026 NSPI (NSEB) IR-13 Page 1 of 1 202...

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) discusses NSPI's integration of performance metrics like CKAIDI and CKAIFI to ensure capital investments deliver intended outcomes, emphasizing system reliability and risk management.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 Request IR-14: 2 3 Page 11 of the report notes that 6 substations and 23 downline protective devices were 4 upgraded to i...

AI summary NSPI details projects upgrading 6 substations and 23 downline devices with remote control and telemetry, aiming to improve grid reliability and reduce outage durations. Projects include specific regions and communities, with 2026 upgrades planned. Metrics and expected improvements are requested.

ille Ridge 83V 6 7 8 Please refer to 2026 ACE M12619, Undertaking U-05 for project costs. 9 10 (b) NS Power will continue to track CKAIDI and CKAIFI at a feeder level and SAIFI and 11 SAIDI at a system level to align with Performance Stand...

AI summary NS Power will track feeder-level CKAIDI/CKAIFI and system-level SAIFI/SAIDI metrics to align with Performance Standards. References are made to Undertaking U-05 (M12619) and NSEB IR-13, with the 2025 Annual Performance Standards Report (M12784) cited as context.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 Request IR-15: 2 3 Figure 1 on page 12 of the report presents a bar chart of Improvement in SAIFI from 2021 4 to 2025, sh...

AI summary The NSEB requested NSPI to provide regional data on customer numbers, SAIFI/SAIDI metrics, and outage statistics from 2021-2025. NSPI directed the NSEB to refer to prior submissions (IR-07) and attached regional data in Attachment 1. The report highlights SAIFI reduction from 2.25 to 1.57 outages/year and SAIDI improvement from 5.23 to 4.79 hours.

Region Year Average Customers CI CH Event Count SAIDI SAIFI Cape Breton 2021 78,500 228,467 894,488 2,866 11.39 2.91 Cape Breton 2022 80,440 223,055 635,489 3,356 7.90 2.77 Cape Breton 2023 80,923 243,570 662,507 2,272 8.19 3.01 Cape Breto...

AI summary The table presents reliability metrics for Nova Scotia regions (Cape Breton, Metro, Northeast) from 2021 to 2025, including SAIDI (System Average Interruption Duration Index) and SAIFI (System Average Interruption Frequency Index) values, alongside customer counts and outage data. Metrics show variations in outage frequency and duration across regions and years.

2 2,766 6.49 2.39 Northeast 2024 99,342 254,191 711,472 2,437 7.16 2.56 Northeast 2025 100,053 194,766 632,302 2,266 6.32 1.95 West 2021 110,089 289,254 557,583 2,591 5.06 2.63 West 2022 113,550 204,469 611,716 2,777 5.39 1.80 West 2023 11...

AI summary The text presents performance metrics (SAIFI, CAIDI, SAIDI) for Nova Scotia Power Inc. (NSPI) across regions (Northeast, West) and years (2021-2025), alongside references to NSEB M12784 and non-confidential NSPI responses to regulatory information requests.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 Request IR-17: 2 3 Regarding the foreign interference outage causes listed on page 15 of the report: For each 4 year from...

AI summary NSPI provides data on foreign interference outage events from 2021-2025, showing annual counts of such events versus total outages (excluding planned outages and those from MEDs/EEDs). The table reveals increasing trends in both foreign interference and total outages during the period.

PS SAIDI (Foreign Year PS SAIDI Interference Removed) 2012 2.90 2.55 2013 3.52 3.21 2014 3.87 3.45 2015 4.67 4.31 2016 (To Oct) 3.62 3.29 Average Annual SAIDI 3.72 3.36 Standard Deviation 0.58 0.56 1 2 Using the target setting methodology...

AI summary The text presents PS SAIDI (System Average Interruption Duration Index) metrics from 2012–2016, showing performance with and without foreign interference. It outlines revised SAIDI targets (4.29 with interference, 3.93 without) and evaluates 2017–2019 performance against these thresholds, highlighting deviations from targets.

.09 2018 4.29 4.43 3.93 4.10 2019 4.29 5.99 3.93 5.36 2020 4.29 3.98 3.93 3.44 2021 4.29 5.23 3.93 4.77 2022 4.29 5.16 3.93 4.62 2023 4.29 5.21 3.93 4.61 Date Filed: May 29, 2026 NSPI (NSEB) IR-18 Page 2 of 3 2025 Annual Performance Standa...

AI summary The document includes performance metrics (e.g., SAIFI, CAIDI) from 2018–2023 and references NSPI's 2025 Annual Performance Standards Report (NSEB M12784), along with NSPI's responses to NSEB information requests. The data highlights reliability indices and regulatory compliance efforts.

PS SAIDI (Foreign Interference PS SAIDI Removed) 2024 4.29 5.26 3.93 4.56 2025 4.29 4.79 3.93 4.19 1 2 While a change of approach for target setting and removal of foreign interference-caused 3 events would not have resulted in any additio...

AI summary The text discusses the impact of foreign interference events on PS SAIDI performance metrics, noting that such events (e.g., motor vehicle accidents, wildlife interference) are beyond the utility’s control. NS Power argues that these events affect SAIDI outcomes, and while target adjustments do not add years meeting the standard, they highlight performance differences. Mitigation strategies, like vegetation management, should target outage causes.

ppropriate mitigating strategy (for example, vegetation 19 management or device replacement) should be made in consideration of the outage cause. 20 Using ROW widening to mitigating deteriorating poles will not address the outage risk 21 p...

AI summary The text emphasizes the importance of understanding outage causes and using leading/lagging indicators for risk-based decisions. It critiques ineffective mitigation strategies like ROW widening and new insulators, arguing they fail to address root risks from asset failures or tree contact.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-19: 2 3 Page 16 of the report, Figure 3 4 5 Please provide the annual contribution of fore...

AI summary NSPI provides data on the annual contribution of foreign interference outages to SAIFI and SAIDI from 2016 to 2025 as part of the NSEB M12784 proceeding, detailing metrics for system reliability and performance standards.

1 Request IR-20: 2 3 Regarding Section 2.1 4 5 “Potential for Future Improvements in Performance Standards”, on page 6 17 of the report, NS Power states: “This data shows that as the standards 7 become more stringent as performance improve...

AI summary NS Power agrees with current performance standard methodologies and the 5-Year Reliability Plan to meet targets. It asserts the Asset Management Framework is the most appropriate method for addressing asset risks and feeder performance, without explicitly endorsing stricter targets as performance improves.

2025 Annual Performance Standards Report (NSEB M1784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 It does not foresee a scenario where significant risks would remain unmitigated simply due 2 to a cost...

AI summary NSPI explains that tightening performance thresholds for CKAIFI/CKAIDI as system performance improves may still result in circuit violations due to relative performance differences. Even with improvements, stringent targets could require additional investment for outage mitigation, particularly for hard-to-address causes like motor vehicle accidents.

NSPI (NSEB) IR-24 Page 1 of 1 2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-25: 2 3 Figure 10 of the report on page 30 shows system avai...

AI summary NSPI responds to NSEB's IR-25 request regarding 2025 data network availability (66.58% uptime). The Outage Map remained functional during downtime via contingency plans, with 33.42% of time covered by these plans. The downtime was attributed to cyber incident impacts and containment efforts.

1 Request IR-26: 2 3 Page 36 and Appendix G of the report states: 4 5 “The elevated Polite Disconnect rate in 2025 is attributable to the impacts 6 of the April 2025 cyber incident, as trunking capacity was limited at the 7 contingency con...

AI summary The 2025 cyber incident limited NS Power's contingency contact centre trunking capacity due to insufficient desks and phone lines, which could not be rapidly scaled. The contingency site was designed for short-term disaster use, prioritizing safety-critical calls over routine traffic, leading to elevated Polite Disconnect rates.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-27: 2 3 Figure 18 on page 43 shows customer impact and restoration time-all-in. 4 5 (a) Pr...

AI summary NSPI responds to NSEB's IR-27 request by explaining that ETR updates are based on real-time field data and historical restoration patterns. Initial ETRs use predictive models, while updates reflect confirmed outage details like damage scope and repair needs, with an example provided for overhead fault outages.

suspected overhead fault. This initial estimated restoration time is based on the predicted 30 size and location of the outage. These outage characteristics are cross-referenced against Date Filed: May 29, 2026 NSPI (NSEB) IR-27 Page 1 of...

AI summary The text explains how NSPI estimates and updates Estimated Time to Restore (ETR) for outages, using historical data and field assessments. Initial estimates are based on outage size/location, but may be revised if on-site conditions require additional time or simpler repairs. This process is part of NSPI's response to NSEB's information request regarding the 2025 Annual Performance Standards Report.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-28: 2 3 Regarding Figure 29 and 30 in the report (pages 52-53): Board staff notes that the...

AI summary NSPI clarifies that Figures 29 and 30 in the 2025 Annual Performance Standards Report use CHI (customer hours of interruption) and event count data, not CI (customer interruptions), due to a typographical error in figure titles and axes labels. The correct data aligns with prior responses to NSEB IR-184 and IR-185 in M12619.

NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL Annual Tree Contact CHI and Event Count 800,000 3,500 Customer Hours of Interruption (CHI) 700,000 3,000 600,000 2,500 500,000 Event Count 2,000 400,000 1,500...

AI summary NSPI provided data to the Nova Scotia Energy Board showing trends in Customer Hours of Interruption (CHI) and event counts from 2020 to 2025. The visualizations highlight service interruption metrics over time, reflecting reliability performance and outage frequency.

0 0 2020 2021 2022 2023 2024 2025 Customer Outage Hours Outage Event Count 1 2 Annual Equipment Failure CHI and Event Count 800,000 4,000 700,000 3,500 Customer Hours of Interruption (CHI) 600,000 3,000 500,000 2,500 Event Count 400,000 2,...

AI summary The text presents outage metrics from 2020 to 2025, including Customer Hours of Interruption (CHI), Outage Event Count, and Annual Equipment Failure data. Graphs show trends in customer outage hours and event counts over time, indicating performance indicators for power system reliability.

2020 2021 2022 2023 2024 2025 Customer Outage Hours Outage Event Count 3 Date Filed: May 29, 2026 NSPI (NSEB) IR-28 Page 2 of 2 2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information R...

AI summary The 2025 Annual Performance Standards Report notes customer interruptions reached their lowest level in 2025, but customer hours of interruptions remained near 2021 levels and exceeded 2020 levels. NSPI attributes this to outage frequency investments having more immediate impact than duration investments, though equipment failure outages take longer to restore due to location and coordination challenges.

NON-CONFIDENTIAL 1 Request IR-30: 2 3 Page 56 of the report, Figure 32 4 5 (a) Please extend Figure 32 to also include the same data for 2016-2025. 6 7 Response IR-30: 8 9 (a) Hours >=80 Storm Major Event Extreme Event Total Storm Year km/...

AI summary The response to Request IR-30 provides updated data on wind gust hours and storm days from 2016 to 2025, including a correction for 2025 data after recovering information from a missing weather station. The data highlights trends in storm-related events and their impact on the power system.

ionally relevant 12 to the total storm days in a year. 13 14 The 2025 wind gust hours were updated from 93 to 99 after recovering data from a 15 missing weather station. Date Filed: May 29, 2026 NSPI (NSEB) IR-30 Page 1 of 1 2025 Annual Pe...

AI summary NSPI explains an outage on Wreck Cove Feeder 85S-401 caused by protection system tripping during generator testing at Wreck Cove Hydro Generating Station. A design change was implemented to prevent recurrence, as detailed in the 2025 Annual Performance Standards Report (NSEB M12784).

tripped the breaker, including the distribution transformer on the bus, causing 85S-401 to 23 experience an outage. 24 25 (b) A design change was implemented to prevent reoccurrence. Date Filed: May 29, 2026 NSPI (NSEB) IR-31 Page 1 of 1 2...

AI summary An outage on circuit 85S-401 occurred due to a tripped breaker and distribution transformer failure. A design change was implemented to prevent recurrence. The text references NSPI's responses to NSEB information requests in the 2025 Annual Performance Standards Report (NSEB M12784).

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-32: 2 3 The report indicates Wreck Cove Feeder 85S-401 serves approximately 2,266 customer...

AI summary The Nova Scotia Energy Board (NSEB) requests NSPI to explain plans for remaining off-road distribution lines, cost implications for reliability investments, outage data, and impacts on CKAIDI/CKAIFI metrics related to the Wreck Cove Feeder 85S-401 in its 2025 Annual Performance Standards Report (NSEB M12784).

uptions have on CKAIDI and CKAIFI for this 28 line? 29 30 (e) Did any of the 152 outages in 2025 occur on portions of the line that had been brought 31 to roadside since 2019? Date Filed: May 29, 2026 NSPI (NSEB) IR-32 Page 1 of 5 2025 Ann...

AI summary The Nova Scotia Energy Board (NSEB) seeks information from Nova Scotia Power Inc. (NSPI) regarding the 2025 Annual Performance Standards Report, specifically asking about the impact of outages on CKAIDI/CKAIFI metrics and whether 2025 outages occurred on infrastructure upgraded to roadside since 2019.

1 Response IR-32: 2 3 (a) At this time, NS Power is not necessarily planning to relocate all remaining off-road 4 sections of feeder 85S-401 to roadside. Following completion of the 2025 Wreck Cove 5 Bring-to-Roadside project and the plann...

AI summary NS Power explains that not all off-road sections of feeder 85S-401 will be relocated to roadside due to federal jurisdiction over parts in Cape Breton Highlands National Park and challenging terrain. Reliability improvements will focus on vegetation management, equipment upgrades, and grid modernization like FLISR, with selective bring-to-roadside work in high-impact areas.

1 (b) Cost is one of several factors considered in NS Power’s reliability investment planning; 2 however, it is not evaluated in isolation and a fixed cost-per-km threshold is not applied 3 for bring-to-roadside projects. Costs vary signif...

AI summary NS Power emphasizes that cost is not the sole factor in reliability investments, with bring-to-roadside project costs varying widely due to terrain and complexity. They evaluate benefits like outage reduction and consider alternatives such as FLISR and vegetation management. Outage management systems track faults at protective device levels, not precise geographic locations.

hic 25 location of the underlying fault. While field crews determine the fault location during 26 restoration, this information is not consistently captured with sufficient geographic 27 precision to distinguish whether the fault occurred...

AI summary The text highlights inconsistencies in capturing fault location data during restoration, noting that geographic precision is insufficient to distinguish on-road vs. off-road feeder faults. It references NSPI's responses to NSEB information requests and the 2025 Annual Performance Standards Report (NSEB M12784).

1 In addition, the section of line between two protective devices may include both roadside 2 and off-road segments. As a result, even where the affected device is known, it is not 3 always possible to determine with certainty whether the...

AI summary NS Power cannot definitively attribute 152 outage events on feeder 85S-401 in 2025 to on-road or off-road sections due to imprecise fault location records. Loss of supply events, which contributed 2.85 to CKAIDI and 1.00 to CKAIFI, are unrelated to line location. Off-road sections may influence CKAIDI through increased restoration times, but segment-specific contributions cannot be quantified.

and are therefore not attributable to off-road distribution sections. 25 Excluding these events, off-road sections are more likely to influence CKAIDI through 26 increased restoration time requirements, although this impact cannot be preci...

AI summary NSPI explains that outage events are recorded at the protective device level, not precise geographic locations, limiting attribution to specific feeder segments. NSPI concludes no 2025 outages originated from sections brought to roadside, referencing projects like Cape Smokey and Wreck Cove. The text discusses impacts on CKAIDI and CKAIFI metrics due to restoration times and outage occurrences.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-33: 2 3 Page 111 of the report, Figure 80 4 5 (a) Please explain what activities are assoc...

AI summary NSPI explains that 'switching' planned outages are secondary outages required to repair prior outages (e.g., opening reclosers to isolate work areas). These differ from 'reliability' outages, which are primary planned outages. The response highlights how switching outages impact SAIDI metrics and NS Power's performance against targets.

r Failed Equipment, while 28 the subsequent outage (to previously unaffected customers) caused by opening the recloser 29 is considered a switching outage and coded accordingly. 30 Date Filed: May 29, 2026 NSPI (NSEB) IR-33 Page 1 of 3 202...

AI summary The text distinguishes between switching outages (due to equipment failure) and reliability outages (planned maintenance). It explains that reliability outages involve routine work like replacing insulators, while switching outages result from subsequent actions after equipment failure. Wildfire-related actions in 2025 significantly impacted customer hours of interruption (CHI) compared to 2024.

2025 2024 100000 50000 0 Capital Reliability Customer Switching Tree Trimming Planned Requested Transmission 14 15 16 (d) As detailed on page 15 of the 2025 Performance Standards Report, planned outages 17 (including Switching and Reliabil...

AI summary The 2025 Annual Performance Standards Report excludes planned outages (including Switching and Reliability) from reliability metrics. NSPI submitted responses to NSEB information requests, with the document dated May 29, 2026, referencing NSEB M12784.

1 Request IR-2: 2 3 Refer to M12784, Exhibit N-1, the 2025 PSR Report, Section 4.0 Customer Level Reliability 4 Data, page 89 of 115, at lines 6-10 and Figure 60 Summary of Customer Level Reliability 5 Metric Use by Electric Canada Utiliti...

AI summary The request focuses on the preparation and use of Figure 60, which summarizes customer-level reliability metrics from an Electricity Canada survey, and how NS Power plans to monitor and update these metrics. NS Power explains that the figure was created using the survey results and that the full report cannot be shared due to confidentiality agreements. They also mention their reliance on Electricity Canada for updates and that they plan to use Performance Standards reporting to monitor metrics.

(c) Were there any major or extreme weather events during November 2025 that would explain why, in that particular month, NS Power failed to meet 4 of the 5 New Service 1 Connection thresholds? If not, what was the reason for the departure...

AI summary The text discusses NS Power's failure to meet service standards in November 2025, asking if extreme weather events were the cause. It also includes a table with customer distribution data and a request for additional reliability improvement plans for the Wreck Cove area.

(e) All planned investments for feeder 85S-401 are documented in Section 3.4 and Figure 45 of the 2025 Performance Standards report. 1 Request IR-5: 2 3 Refer to the 2025 PSR Report, Section 4.0 Customer-Level Reliability Data, Figure 55:...

AI summary The improvement in customer-level reliability metrics (CEMI-4 and CEMI-5) in 2025 is attributed to reduced system-wide outage frequency, driven by reliability investments, vegetation management, and targeted grid improvements, including work on 46 priority feeders.

Date Filed: May 7, 2026 CA (NSPI) Page 1 of 3 1 Request IR-1: 2 3 Reference: Reduction in outages caused by tree strikes. 4 5 Please explain the extent to which the reduction in outages caused by tree strikes was: 6 7 a) The result of vege...

AI summary The document contains three information requests directed at Nova Scotia Power (NSP) regarding outage reduction methods, customer service performance metrics, and weather response protocols. It seeks clarification on the factors contributing to outage reductions, evidence for customer service claims, and details about NSP's weather forecasting and emergency operations.

6 outages experienced by customers is reduced. However, the standards for 17 measuring problem feeder performance become more stringent as the 18 performance improves. 19 This positive result reduces the calculated performance threshold fo...

AI summary As system performance improves, stricter standards reduce the CKAIFI performance threshold, with a 16% reduction in 2025 compared to 2024 and 22% compared to the previous five-year average. Regulatory questions challenge NSPI on whether improved performance disadvantages feeders, the appropriateness of the updated threshold, and structural factors affecting SAIDI compliance.

15 providing your answer, identify any reasons within and outside NSPI’s 16 control. 17 Request IR-3: 18 Reference: Page 9, lines 2-5. 19 “NS Power is already seeing positive results from the $206 million invested 20 in the first year of t...

AI summary The document requests NSPI to explain its analysis linking SAIDI improvements to the Five-Year Reliability Plan, including methodology for handling weather effects and quantitative analysis of project impacts on reliability metrics. It cites 2025 outage reductions and alignment with reliability targets.

ategories) to changes in 5 SAIDI and/or SAIFI. If so, please describe the methodology, inputs, 6 assumptions, and results, and provide supporting materials. 7 (c) Please provide the calculations and supporting data underlying the 8 reporte...

AI summary The text requests NSPI to clarify methodologies for calculating reliability metrics (SAIDI/SAIFI), verify data alignment with the 2026 ACE Plan, and explain assumptions about outage attributions (e.g., 40% adverse weather factor). It also seeks validation of the 40% allocator's basis and source.

ndard and provide the supporting source), or whether it is an 24 internal NSPI assumption (and, if so, provide the rationale and any 25 validation performed). 26 (d) Please confirm whether the reduction in tree-contact outages in 2025 is a...

AI summary The regulator requests NSPI to clarify assumptions about cost deferral, explain the reduction in tree-contact outages, and reconcile data discrepancies in the 2026 ACE Plan. Specific inquiries include whether outage reductions stem from weather improvements or reliability investments, and why outage events decreased but customer outage hours increased since 2020.

inclusion/exclusion criteria, changes in 13 restoration practices, and/or major-event impacts) and provide the 14 underlying annual totals used for Figure 30. 15 (c) Please confirm whether the reductions in outages in 2025 are at least 16...

AI summary The text includes requests for clarification on outage reduction factors, reliability plan impacts, and customer-level reliability data. It asks NSPI to explain whether improved weather or reliability investments caused 2025 outage reductions, assess chronic feeder status, and clarify the role of CEMI/CELID metrics in reliability standards.

proposed customer-level reliability standards. 5 (a) Does NSPI view CEMI/CELID as informational only, or precursors to 6 enforceable standards? Please explain. 7 (b) Does NSPI oppose eventual inclusion of these metrics in its performance 8...

AI summary The document contains regulatory questions directed at NSPI regarding customer-level reliability standards, data reporting practices for CKAIFI/CKAIDI metrics, and the inclusion of reliability metrics in performance standards. It requests clarification on NSPI's stance on enforceable standards, data exclusions in Appendices I and K, and timelines for finalizing reliability metrics.

tage 26 events excluded from CKAIFI and/or CKAIDI calculations. M12784 - IG IRs to NSPI - May 7, 2026.docx -6- 1 (c) For each feeder with zero or missing Appendix I data and no Appendix K 2 records, please state whether the feeder was ener...

AI summary The document outlines requests (IR-10) to NSPI regarding data exclusions from CKAIFI/CKADI calculations and recalculations of SAIDI/SAIFI metrics. It asks NSPI to clarify whether feeders with missing data were energized, tracked for performance, and to recalculate system reliability metrics by year, highlighting discrepancies between reported and recalculated values. Matter number M12784 is referenced.

Document: 330133 Date Filed: May 7, 2026 Page 1 1 Request IR-1: 2 Please provide data on all outage events in 2025, as an Excel file, including the same information 3 provided for planned outages in Appendix K, and noting which outages wer...

AI summary The document contains four regulatory information requests (IR-1 to IR-4) directed at a utility, seeking data on outage events, transmission reliability evaluation methods, statistical analysis of investment impacts on customer satisfaction and operating costs, and clarification on SAIFI metric calculations. The requests aim to assess system performance, reliability, and cost-effectiveness.

igh customer density region compared to the utility’s other 28 operating regions. 29 a) How does the utility determine and measure actual performance when the numerator 30 and/or denominator changes year over year? 31 b) Please provide the...

AI summary The text raises two questions about utility performance measurement: (1) How to assess performance when numerator/denominator metrics change over time, and (2) Requesting SAIFI percent change data from 2021 to 2025. The focus is on reliability metrics and performance evaluation methodologies.

and measure actual performance when the numerator 30 and/or denominator changes year over year? 31 b) Please provide the percent change in SAIFI for each year from 2021 to 2025. 32

AI summary The text requests clarification on measuring performance when metrics change year-over-year and asks for the percent change in SAIFI (System Average Interruption Frequency Index) from 2021 to 2025, focusing on reliability and service quality metrics in the electricity sector.

Document: 330133 Date Filed: May 7, 2026 Page 2 1 Request IR-5: 2 Since 2020 through 2025, please provide the total number of planned outages along with the total 3 outage duration. 4 5 Request IR-6: 6 a) Did any of the opt-out customers r...

AI summary The document contains information requests (IR-5 to IR-7) directed at Nova Scotia Power (NSP). IR-5 seeks outage data from 2020-2025, IR-6 investigates estimated billing practices for opt-out customers in 2025, and IR-7 requests detailed reliability plan performance metrics, including outage reductions, infrastructure data, and project expenditures across NSP’s four operating regions.

ies within the utility’s control, such as replacing defective equipment 27 and vegetation management. 28 d) For the distribution lines identified in b), please indicate what percentage of the line does 29 not require any vegetation managem...

AI summary The text requests information on distribution lines not requiring vegetation management, including outage cause percentages, customer numbers, outage counts, and interruption hours, distinguishing between lines needing and not needing vegetation management.

, and the total 32 customer hours of interruptions, reported separately for distribution lines that 33 require vegetation management and those that do not.

AI summary The text references total customer hours of interruptions, distinguishing between distribution lines requiring vegetation management and those that do not, highlighting reliability and maintenance considerations in service delivery.

Document: 330133 Date Filed: May 7, 2026 Page 3 1 e) A breakdown of total substations, including primary and secondary voltage level, number 2 of customers served, number of outages experienced, and total customer hours of 3 interruptions....

AI summary The document requests detailed information on NSP's substation performance, outage causes, reliability projects, and customer satisfaction metrics. It specifically asks to confirm whether reported outage reductions exclude outages linked to MEDs and EEDs, requesting underlying data and annual outage counts for tree contact and equipment failure incidents.

r of outages related to tree contacts (exclusive of 24 those associated with MEDs and EEDs) for each year from 2020 to 2025. 25 C. Please provide the number of outages related to equipment failures 26 (exclusive of those associated with ME...

AI summary The text requests detailed outage data from 2020 to 2025, specifically excluding outages related to MEDs and EEDs, with separate categories for tree contacts and equipment failures. It also seeks underlying data for calculations and reaffirms the need for tree contact outage statistics.

B. Please provide the number of outages related to tree contacts (exclusive of 32 those associated with MEDs and EEDs) for each year from 2020 to 2025.

AI summary The text requests data on the number of outages caused by tree contacts from 2020 to 2025, excluding those linked to MEDs (Major Equipment Defects) and EEDs (Equipment End-of-Life Defects). The focus is on isolating tree-related outages to assess grid reliability and infrastructure management.

Document: 330133 Date Filed: May 7, 2026 Page 4 1 C. Please provide the number of outages related to equipment failures 2 (exclusive of those associated with MEDs and EEDs) for each year from 3 2020 to 2025. 4 iii. Board staff notes that i...

AI summary The document requests reconciliation of conflicting outage reduction figures (14% vs. 18%) between NS Power's data and the 2025 Performance Standard Report, and detailed metrics for tree-related outages from 2020–2025, including investment data. NS Power provided 2024–2025 equipment failure outage numbers in response to NSEB IR-185 (M12619).

ii. The total number of customer hours of interruptions. 22 iii. The customer average interruption duration index. 23 b) Please identify the percentage reduction/increase in customer hours of interruption 24 resulting in outages due to tre...

AI summary The text requests data on customer interruptions caused by tree contacts (excluding MEDs and EEDs), including metrics like customer hours of interruption, average interruption duration index, and percentage changes from 2020-2025. It also asks for a table detailing annual outage data for lines with completed vegetation management work.

The total number of customer interruptions. 33 ii. The total number of customer hours of interruptions. 34 iii. The customer average interruption duration index.

AI summary The text discusses three service reliability metrics: total customer interruptions, total interruption hours, and average interruption duration index, which are critical for assessing grid performance and customer impact.

Document: 330133 Date Filed: May 7, 2026 Page 5 1 d) Please identify the percentage reduction/increase in customer hours of interruption 2 resulting in outages due to tree contacts only on lines on which NS Power completed 3 vegetation man...

AI summary The document requests data on outage reduction from vegetation management, capital expenditures for vegetation management (2019–2025), and analysis of NS Power’s balance between reliability improvements and rate affordability under climate change. It also seeks five-year average outage metrics for areas invested in the $206M reliability plan.

Please provide the five-year average outage frequency and duration results (similar to SAIDI and 28 SAIFI) for only those parts of NS Power’s system where the $206 million was actually invested in 29 the first year of the reliability plan....

AI summary The request seeks five-year average outage metrics (SAIDI/SAIFI) for NS Power’s system areas where $206M was invested in the first year of the reliability plan. It references 2025 work on 46 priority feeders, including equipment upgrades and tree trimming, as outlined in the report.

Document: 330133 Date Filed: May 7, 2026 Page 6 1 a) For each year from 2020 to 2025, for outages caused by equipment failure only (exclusive 2 of those associated with MEDs and EEDs) please provide a table identifying the following: 3 i....

AI summary The document contains requests for data on outage performance, capital expenditures, and infrastructure investments by Nova Scotia Power (NSP). It seeks metrics on customer interruptions, expenditure breakdowns for T&D equipment, and performance tracking for reliability upgrades. The Nova Scotia Energy Board (NSEB) is referenced as the regulatory body overseeing these matters.

Document: 330133 Date Filed: May 7, 2026 Page 7 1 c) What level of improvement is expected after these projects, and how will the utility 2 measure performance before and after implementation? 3 4 Request IR-15: 5 Figure 1 on page 12 of th...

AI summary The NSEB requests NSP to provide detailed data on customer numbers, SAIFI, SAIDI, outage events, and foreign interference causes from 2021–2025, including regional breakdowns and performance metrics to assess reliability improvements.

es on NS Power’s system (exclusive 27 of planned outages, and outages resulting from MEDs, EEDs and SEDs immediately following an 28 MED or EED). 29 30 Request IR-18: 31 Regarding Figure 3 on page 16 of the report: 32 a) Does NS Power agre...

AI summary The text requests clarification from NS Power on whether their SAIDI performance target accounts for outages caused by foreign interference, excluding planned outages and those from MEDs, EEDs, and SEDs. It references Figure 3 on page 16 of the report.

ower agree that the current SAIDI performance target has been set with 33 consideration of inclusion of outages caused by foreign inference? 34 i. If not, please explain.

AI summary The text raises a question about whether the current SAIDI performance target accounts for outages caused by foreign interference, requesting an explanation if it does not. This inquiry focuses on the methodology behind reliability metrics and their alignment with external factors.

Document: 330133 Date Filed: May 7, 2026 Page 8 1 b) Does NS Power agree that if the current SAIDI performance target had been set to exclude 2 the impacts of outages caused by foreign interference, the target would be lower than the 3 cur...

AI summary The document contains regulatory inquiries to NS Power regarding SAIDI performance targets, the relevance of outage causes in SAIDI calculations, and the justification for stricter reliability standards as performance improves. Questions focus on foreign interference impacts, target adjustments, and regulatory tools to incentivize continued improvements.

average, in setting the 25 Circuit Average Interruption Duration Index (CKAIDI) and Circuit Average Interruption 26 Frequency Index (CKAIFI) standards, no longer justify the costs? If so, please explain. 27 28 Request IR-21: 29 Page 18 of...

AI summary The text raises two questions: (1) whether current CAIDI/CAIFI standards justify costs, and (2) a discrepancy in Exhibit N-1 regarding which feeders exceeded 2025 thresholds. It requests clarification on both issues.

ecurity breach. 26 b) Please provide the posting and closing dates of all recruitment efforts for customer care 27 representatives in 2025 after the cybersecurity breach. 28 c) How many people applied for the positions, out of which only 4...

AI summary The document contains two information requests: (1) details about recruitment for customer care roles post-2025 cybersecurity breach, including application numbers and selection criteria; (2) inquiries about customer notification services' reliance on data networks with 66.58% availability in 2025 and how services remained operational during outages.

6.58% of the time. 33 a) What kinds of customer notification services access the data networks, and how were 34 those services not impacted when the data networks were unavailable? 35

AI summary The text presents a question regarding customer notification services accessing data networks and their resilience during network outages, highlighting concerns about service continuity and data availability in regulatory proceedings.

Document: 330133 Date Filed: May 7, 2026 Page 10 1 Request IR-26: 2 Page 36 and Appendix G of the report states: “The elevated Polite Disconnect rate in 2025 is 3 attributable to the impacts of the April 2025 cyber incident, as trunking ca...

AI summary The document contains requests from the NSEB and the Board seeking clarifications on outage management, ETR processes, data discrepancies, and interruption metrics. Key issues include the impact of a cyber incident on trunking capacity, reconciliation of CI numbers, and customer interruption hours.

since 2021. 28 a) Please clarify that although customer interruptions reached their lowest level in 2025, 29 customer hours of interruptions remained close to 2021 levels and were higher than in 30 2020, despite the significantly higher nu...

AI summary A request seeks clarification on customer interruption trends, noting that while interruptions reached their lowest level in 2025, customer hours of interruption remained near 2021 levels and exceeded 2020 levels despite higher interruptions in those years. The request also asks to extend Figure 32's data to include 2016–2025.

ificantly higher number of interruptions in those years. 31 32 Request IR-30: 33 Page 56 of the report, Figure 32 34 a) Please extend Figure 32 to also include the same data for 2016-2025.

AI summary The text references a request (IR-30) to extend Figure 32's data period from its current coverage to include 2016-2025, highlighting concerns about significantly higher interruption numbers during those years.

Document: 330133 Date Filed: May 7, 2026 Page 11 1 Request IR-31: 2 Regarding Wreck Cove Feeder 85S-401, on page 62 of the report states: 3 On November 23, 2025 a full outage affected all the customers on 85S-401 for 2.85 hours. 4 The outa...

AI summary The document raises two inquiries about Nova Scotia Power's (NSP) Wreck Cove Feeder 85S-401: (1) the cause and correction of a 2025 outage linked to generator testing at Wreck Cove Hydro Generating Station, and (2) plans for the remaining 43.75 km of off-road distribution line, including costs and timelines for the Bring-to-Roadside project.

impacting a total of approximately 5.95 kms of the line (although the 22 Halfway Brook project has a pole replacement component). 23 a) What are the current plans for the remaining 43.75 kms of the distribution line that will still 24 be o...

AI summary The document contains questions from the Nova Scotia Energy Board (NSEB) to Nova Scotia Power (NSP) regarding infrastructure planning for distribution lines, reliability impacts of off-road segments, outage statistics, and the distinction between 'switching' and 'reliability' planned outages. It requests data on SAIDI, CAIDI, and CAIFI metrics, as well as analysis of cost implications and mitigation strategies.

Page 1 of 4 1 Request IR-1: 2 Refer to M12784, Exhibit N-1, Nova Scotia Power Incorporated (“NS Power”) 2025 Annual 3 Performance Standards Report Non-Confidential (the “2025 PSR Report”), Section 3.1 Customer 4 Service Standards and Targe...

AI summary The document contains two information requests (IR-1 and IR-2) related to Nova Scotia Power's (NSP) 2025 Performance Standards Report. IR-1 asks about customer participation in forums, delayed bill payments, credit rating impacts, and cyber event effects on billing. IR-2 inquires about the preparation of reliability data figures and their sources. Topics include customer service, billing procedures, cybersecurity, and system reliability.

M12784 – SBA IRs – May 7, 2026 Page 2 of 4 1 2 3 a) It does not appear that the 2025 Result is a direct average of the numbers provided for each 4 month. Please confirm how the 2025 Results are calculated. 5 b) What is the reason for excee...

AI summary The document contains questions and requests from the SBA regarding NSP's 2025 performance metrics, including discrepancies in data reporting, reliability threshold exceedances, weather impacts, and small business impacts. It also requests customer counts for a specific feeder and clarifications on time targets.

2025 Results and shows 24 that SAIDI, CKAIDI and CKAIFI thresholds for 2026 were not met. 25 26 a) Please provide the customer count by rate class that are served by Feeder 85S-401, if possible. M12784 – SBA IRs – May 7, 2026 Page 3 of 4 1...

AI summary The SBA requests detailed information on reliability metrics (SAIDI, CKAIDI, CKAIFI) for Feeder 85S-401, including customer counts, FLISR device investments, cost-effectiveness, and reliability improvement plans for Wreck Cove. It also seeks an explanation for improved 2025 reliability data in the PSR Report.

2025 Performance Standards Results - In 2025, NS Power met nine of the 14 Performance Standards. The SAIFI result of 1.57 represents - continued improvement and is the lowest recorded since 2012. - The Company met all adverse weather respo...

AI summary In 2025, NS Power met nine of 14 Performance Standards, with notable improvements in SAIFI and adverse weather response. However, five standards were not achieved, including SAIDI, which was below the target but showed progress. Three feeders failed to meet their targets due to isolated events, and targeted investments are planned for 2026 to address these issues.

Five-Year Reliability Plan – Year One Results - NS Power continues to advance the execution of its Five-Year Reliability Plan (the Plan), with a - focus on improving reliability for Nova Scotians while maintaining an appropriate balance wi...

AI summary NS Power has completed the first year of its Five-Year Reliability Plan, investing $206 million in vegetation management, equipment upgrades, and grid modernization. The plan aims to improve reliability and reduce SAIDI by 20% by 2029, with a focus on maintaining affordability.

Equipment Upgrades and Grid Hardening - NS Power has continued to invest in equipment replacement and infrastructure upgrades designed - to improve system resilience. This includes the use of stronger poles and updated construction - stand...

AI summary NS Power has invested in equipment upgrades and grid hardening to improve system resilience, including stronger poles and updated construction standards. In 2025, targeted reliability work on 46 priority feeders reduced equipment-related outages by 14% compared to 2024. Substation and protective device upgrades are also planned for 2026.

Commitment to Performance Standards - NS Power remains committed to meeting the Performance Standards and continues to advance this - objective through the execution of its Five-Year Reliability Plan. The results to date reflect - ongoing...

AI summary NS Power reaffirms its commitment to meeting performance standards and improving service reliability. It highlights progress made in 2025, despite challenges like a cyber incident, and argues that an administrative penalty is not required. The company emphasizes its ongoing efforts to execute its Five-Year Reliability Plan and achieve sustained improvements.

Delivered by E-mail Crystal Henwood Regulatory Affairs Officer/Clerk Nova Scotia Energy Board 3rd Floor, 1601 Lower Water Street PO Box 1692, Unit "M" Halifax NS B3J 3S3 Dear Ms. Henwood: Re: M12784 - NSPI - 2025 Annual Performance Standar...

AI summary The Industrial Group submitted closing remarks in M12784 regarding NSPI's 2025 Annual Performance Standards Report, highlighting that NSPI met nine of 14 reliability standards but failed on five. The Group acknowledges improvements in outage frequency but notes persistent reliability risks, especially in outage duration and transmission issues. The report also questions the attribution of reliability improvements to Reliability Plan investments and notes a continued failure to meet performance standards for nine consecutive years.

Reliability Investment Review and Reporting The Industrial Group has consistently emphasized the importance of being able to assess whether NSPI's reliability investments are producing the improvements they are intended to deliver. That co...

AI summary The Industrial Group is concerned about the effectiveness of NSPI's reliability investments, questioning whether improvements are due to the Five-Year Reliability Plan and if the plan is cost-effective. The Board has previously required NSPI to improve its metrics for evaluating resiliency investments.

Transmission Loss of Supply Customer outage events resulting from interruptions originating on the transmission system, including substations, are coded as "Loss of Supply". In 2025, loss of supply accounted for 40.5% of all customer hours...

AI summary The document discusses the impact of transmission-related outages on customer interruptions in Nova Scotia, noting that 'Loss of Supply' events accounted for a significant portion of customer hours of interruption in various regions. The Industrial Group recommends improving the Annual Performance Standards Report to better summarize and analyze these outages.

Customer Level Reliability Metrics In Matter M10279, the prior Application for Revision of Performance Standards initiated in 2021, NSPI was directed to provide updates on its progress in developing customer-level reliability data, includi...

AI summary In Matter M10279, NSPI has been directed to provide updates on customer-level reliability data, such as CEMI-5 and CELID-8 metrics. NSPI claims insufficient data exists for establishing benchmarks and plans to rely on existing reporting frameworks and Electricity Canada for insights. The Industrial Group suggests expanding the performance framework to include more granular metrics to better assess reliability shortfalls and their impact on specific customer segments.

Planned Outages and Reporting Transparency While NSPI has met its adverse weather response standards, planned outages remain a material source of interruption for customers. Industrial customers must curtail production, change schedules an...

AI summary The document discusses concerns raised by the Industrial Group regarding the increasing number of planned outages by NSPI and the lack of detailed reporting on their impact. While NSPI provides aggregate data, the Industrial Group argues that disaggregated data by feeder or substation would better inform the Board about the distribution and impact of planned outages on customers.

SAIDI The target for 2017, as set by the Board 13, was 4.29 and was based on a 2012-2016 Average of 3.72, with a standard deviation applied of 0.5814. In 2025, the target for SAIDI was still 4.29 and NS Power achieved 4.79. While this was...

AI summary The SAIDI target set by the Board in 2017 was 4.29, but NS Power achieved 4.79 in 2025, showing only minor improvement from previous years. The SBA argues there is no clear trend in SAIDI results despite significant investments.

wer responded that it generally agrees with the current methodology for the CKAIDI and CKAIFI metrics, but it raises issues with respect to the threshold tightening and the interplay between circuits: ... However, as circuit performance im...

AI summary The entity responding agrees with the current methodology for CKAIDI and CKAIFI metrics but highlights concerns about threshold tightening and the interplay between circuits. It explains that as circuit performance improves, thresholds become more stringent, potentially leading to more violations even with small differences in outage frequency and duration. This may require additional investment for mitigation.

Summary Acknowledging that the failed Customer Service metrics were directly affected by the cyber-security incident, it is disappointing and concerning that we are yet again addressing failed Reliability metrics. While it is acknowledged...

AI summary The text highlights concerns over failed reliability metrics, particularly SAIDI, despite NS Power's efforts including vegetation management and the implementation of a new Reliability Plan in 2025. It emphasizes the need for ratepayers to receive value for their costs, with the submission dated July 3, 2026, by Melissa P. MacAdam, the Small Business Advocate.

1 interruption frequency index (CKAIFI): 2025 Annual Performance Standards Report, Exhibit N-2 1, page 23. 3 4 2025 was the first year of Nova Scotia Power's Five Year Reliability Plan and the Company claims 5 it made progress in reducing...

AI summary Nova Scotia Power made progress in reducing outage frequency and duration in 2025 under its Five Year Reliability Plan. However, it failed to meet customer service targets due to a 2025 cyber attack, which impacted call answer rates and estimated billing. Vegetation management and tree trimming efforts are showing positive results.

- 1 Nova Scotia Power reports that outages caused by trees making contact with power lines were at - 2 their lowest level in the last five years in 2025, after the investment of 90 million dollars in - 3 vegetation management over 2024 and...

AI summary Nova Scotia Power reports a reduction in tree-related outages in 2025, attributing it to a $90 million investment in vegetation management over 2024 and 2025. The company acknowledges favorable weather conditions in 2025 but argues that the investment was crucial in reducing outages.

DATE FILED: July 17, 2026 Page 3 of 15 1 2.0 CONSUMER ADVOCATE'S COMMENTS 2 3 The CA acknowledged that there has been an improvement in the indices of reliability (page 1, 4 line 20) and that the increased vegetation management and tree tr...

AI summary The Consumer Advocate (CA) acknowledges improvements in reliability due to vegetation management and tree trimming under the Five-Year Reliability Plan but emphasizes that customer concerns about outage frequency and duration remain unmet. The CA also attributes NS Power's failure to meet customer service standards in 2025 to a cyber incident and suggests flexibility in outage reporting thresholds for 2026.

of investment in vegetation management and transmission and distribution, including bringing more lines to the roadside. However, it is unclear from NS Power's responses to IRs how much further work NS Power is prepared to do to address th...

AI summary The document discusses NS Power's investment in vegetation management and infrastructure, as well as concerns about the target-setting approach for problem feeders. The SBA supports the use of the two-standard deviations method for performance metrics and highlights NS Power's acknowledgment of the need for continued improvement, aligned with the Five-Year Reliability Plan starting in 2025.

4.0 INDUSTRIAL GROUP'S COMMENTS The IG provided comments in five areas: reliability investment, transmission supply, customer level metrics, planned outages, and administrative penalty. 4.1 Reliability Investment Review and Reporting The I...

AI summary The Industrial Group (IG) acknowledges NS Power's 2025 reliability improvements but criticizes the lack of a quantitative model to attribute these improvements to specific Reliability Plan programs. The IG requests the Board to direct NSPI to provide a program-level attribution analysis and trajectory analysis in its next Annual Performance Standards Report to ensure proper efforts are being made for anticipated inclement weather.