Topic:"Performance Monitoring" in M12784

Nova Scotia Energy Board IN THE MATTER OF The Public Utilities Act, R.S.N.S. 1989, c.380, as amended 2025 Annual Performance Standards Report NS Power March 31, 2026 NON-CONFIDENTIAL 2025 Annual Performance Standards Report Non-Confidentia...

AI summary NS Power's 2025 Annual Performance Standards Report outlines its commitment to reliability under the Public Utilities Act. The document details performance metrics in customer service, outage notifications, and service connection times, contextualizing results within regulatory frameworks and potential improvements.

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.

Page 4 of 115 2025 Annual Performance Standards Report Non-Confidential

AI summary The document is titled '2025 Annual Performance Standards Report' and appears to be part of a regulatory proceeding in Nova Scotia. However, the provided text contains no substantive content beyond the title and page number, making further analysis of key arguments, entities, or topics impossible based on the given information.

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.

Page 5 of 115 2025 Annual Performance Standards Report Non-Confidential

AI summary The 2025 Annual Performance Standards Report (non-confidential) is referenced on page 5 of a 115-page document. No substantive content or analysis is visible in the provided text.

f NS Power Customers Experiencing Multiple Interruptions - 4 and 5 29 (MED, EEDs and Planned excluded) .................................................................................... 87 DATE FILED: March 31, 2026 Page 6 of 115 2025 An...

AI summary The document references a 2025 Annual Performance Standards Report related to NS Power customers experiencing multiple service interruptions (excluding MED, EEDs, and planned outages). The report's non-confidential status and filing date (March 31, 2026) are noted.

......................................... 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 • 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.

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.

26 Page 13 of 115 2025 Annual Performance Standards Report Non-Confidential

AI summary The document is the 2025 Annual Performance Standards Report, labeled non-confidential, with page 13 of 115. No substantive content is visible in the provided text.

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.

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.

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.

, 2026 Page 23 of 115 2025 Annual Performance Standards Report Non-Confidential 1 3.0 PERFORMANCE STANDARDS RESULTS 2 3 3.1 Customer Service Standards and Targets 4 5 In 2024, the NSUARB approved the following metrics associated with the c...

AI summary The 2025 Annual Performance Standards Report details how a cyber incident on April 25, 2025, disrupted NS Power's Advanced Meter Infrastructure (AMI), leading to missed customer service targets for estimated bills and call answer rates. The incident increased call volumes by ~46% and support requests by ~189%, prompting NS Power to hire additional staff and use manual meter readings to resume billing by June 2025.

ds did not meet the target for 2 2025, with six out of the twelve months meeting the target as shown in Figure 8. 3 4 Figure 8 - Monthly Percentage of Calls Answered within 30 Seconds

AI summary The target for 2025 was not met, with only six of twelve months achieving the goal. Figure 8 illustrates monthly performance metrics, showing the percentage of calls answered within 30 seconds.

Page 26 of 115 2025 Annual Performance Standards Report Non-Confidential 1 NS Power’s Customer Care Centre received over one million calls from customers in 2025. 2 NS Power customer care representatives supported over 200,000 more custome...

AI summary NS Power's 2025 customer service handled over 1 million calls, a 200,000 increase from 2024, leading to longer call durations. Additional staff and third-party resources were deployed to manage volume, with service levels recovering by December through outreach and resource allocation.

s on board. Without the impact of the incremental call volume from May 13 through December, NS Power would likely have achieved the service level during this period. 14 15 Customer Bills Estimated 16 The description of this standard and th...

AI summary NS Power missed its 2025 annual performance standard for customer bills estimated, increasing from 0.54% pre-cyber incident to 37.80% annually due to a cyber incident. The standard limits estimated bills to 2% annually, which was significantly exceeded.

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 31 of 115 2025 Annual Performance Standards Report Non-Confidential 1 after all customer requirements have been completed (i.e. securing easements, issuance of 2 permits, customer tree trimming, underground infrastructure locates)....

AI summary Nova Scotia Power (NSP) reported 2025 results for new service connection times, meeting or exceeding most targets. The line extension with ≥10 poles had a result of 4.78 days, significantly below the target of 13.7 days, indicating improved performance.

2025 Target 3.0 4.9 3.2 6.2 13.7 2025 Result 2.64 4.15 2.30 5.11 4.78 Variance -0.36 -0.75 -0.9 -1.09 -8.92 5 6 Figure 12 shows that NS Power met all New Service Connection Times targets. 7 8 The monthly average details for the individual...

AI summary NS Power met all New Service Connection Times targets in 2025, with the Energy Delivery Scheduling team prioritizing work orders based on safety, commitments, and service standards. Appendix D details monthly performance metrics.

33 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Notification of an oncoming severe weather event 2 3 The description of this standard and the applicable target are set out in Appendix O. NS Power 4 is required to noti...

AI summary NS Power met 2025 performance standards by notifying customers within four hours of opening the Emergency Operations Centre (EOC) during two storm events and achieving an 85% call answer rate within 45 seconds at the Customer Care Centre. Supporting documentation is referenced in Appendix E and Appendix O.

so filled to 14 capacity with customers on hold. Polite disconnects may occur during the peak of a severe 15 weather or outage event. 16 17 Figure 15 - Historical Polite Disconnect Rate Year Polite Disconnect Rate (%) Target 2020 0.18 ≤10...

AI summary The 2025 Polite Disconnect Rate increased to 3.64% due to a April 2025 cyber incident limiting trunking capacity at NS Power's contingency contact centre. The rate dropped to 1.15% after May 8 when a new platform was implemented, aligning with past performance. The 2022 spike (3.49%) was linked to Hurricane Fiona.

was 1.15 percent, consistent with performance over the past years. 5 6 Supporting documentation, including a monthly breakdown of performance against the target, is 7 contained in Appendix G. 8 DATE FILED: March 31, 2026 Page 37 of 115 202...

AI summary The 2025 Annual Performance Standards Report indicates a 1.15% performance metric, consistent with prior years. Supporting documentation, including monthly performance breakdowns against targets, is provided in Appendix G.

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.

r for storm events based on the 23 historical impact of similar weather. The ETRs automatically assigned during regular operations 24 are reviewed every six months and updated as appropriate. 25 3 M08574, NS Power 2017 Annual Performance S...

AI summary The document discusses the review and updating of Estimated Time of Restoration (ETR) assignments for storm events, referencing prior NSUARB decisions on performance standards. It cites two regulatory orders (M08574 and M10279) related to NS Power's performance metrics and annual reporting requirements.

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.

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.

(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.

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.

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.

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 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.

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.

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.

9.4 7 8 Figure 55 shows the lowest CEMI-4 and CEMI-5 values in 2025, compared to all previous years 9 and the five-year average. 10 Figure 56 - CEMI-4 Annually (2020 – 2025) CEMI-4 25.0% 22.2% 20.2% 19.0% 20.0% 17.3% 14.6% 18% 15.0% 9.9% 1...

AI summary The document highlights significant improvements in CEMI-4 and CEMI-5 metrics for 2025, showing the lowest values compared to previous years and the five-year average, referencing IEEE standards for reliability indices.

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.

Alectra No No No No Algonquin No No No No DATE FILED: March 31, 2026 Page 89 of 115 2025 Annual Performance Standards Report Non-Confidential Utilities CEMI CELID CEMM OTHER Elexicon No No No No FortisON No No No No Hydro One Yes Yes No No...

AI summary The 2025 Annual Performance Standards Report lists utilities and their compliance with CEMI (Customers Experiencing Multiple Interruptions) and CELID (Customers Experiencing Long Interruption Duration) metrics. Hydro One and BC Hydro are marked as 'Yes' for CEMI, while others are 'No'.

No No No No New Brunswick New Brunswick Power No No No No Saint John Energy No No No No DATE FILED: March 31, 2026 Page 90 of 115 2025 Annual Performance Standards Report Non-Confidential Utilities CEMI CELID CEMM OTHER Alberta ENMAX No No...

AI summary The text is a non-confidential excerpt from the 2025 Annual Performance Standards Report, listing utilities across Canadian provinces with metrics like CEMI and CELID marked as 'No'. No specific data or analysis is provided beyond the table structure and page references.

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.

itional challenges. Over 56,000 13 customers were without power during the event as shown in Figure 66. 14 All Performance Standards Metrics for the December 3, 2025 event are summarized below. DATE FILED: March 31, 2026 Page 94 of 115 202...

AI summary The December 3, 2025 storm event left 56,867 customers without power. Performance standards metrics (e.g., 100% customer restoration within 48 hours, 96.98% outage calls answered in 45 seconds) were achieved, though the EOC was not activated. SAIDI and SAIFI values were 0.43 and 0.10, respectively, reflecting outage duration and frequency.

Restored 5000 0 West Metro Northeast Cape Breton Provincial Customers 2 3 NS Power’s Customer Care Centre received 12,322 calls during the December 3, 2025 MED. 4 96.98 percent of calls were answered within the 45-second target. Over 81 pe...

AI summary NS Power's Customer Care Centre handled 12,322 calls during the December 3, 2025 MED, achieving 96.98% call answer rates within 45 seconds. 81.4% of customers were satisfied with HVCA self-service, while 3,203 opted for CSA assistance. Metrics highlight service efficiency during outage events.

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.

2025 120000 Total Customers Out 100000 80000 60000 48 Hours Dec 21 15:25 40000 98.9% Restored 20000 0 West Metro Northeast Cape Breton Provincial Customers 2 3 NS Power’s Customer Care Centre received 56,401 calls during the December 19-20...

AI summary NS Power's Customer Care Centre handled 56,401 calls during the December 19-20, 2025 EED/MED, with 93.32% answered within 45 seconds. 79.7% of customers were satisfied with HVCA self-service, while 12,100 opted for CSA assistance. Figure 72 details these metrics.

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.

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.

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.

out in Appendix O. 5 6 Figure 81 – 2026 Performance Standards Targets Standard 2026 Performance Targets SAIDI ≤ 4.29 SAIFI ≤ 2.05 CKAIDI 81S-305, 76V-301 CKAIFI 91W-411, 57W-402, 15N-401 NS Power to notify customers of the decision to Noti...

AI summary The 2026 performance standards report outlines targets for SAIDI (≤4.29), SAIFI (≤2.05), CKAIDI, and CKAIFI, alongside requirements for ETR updates, customer restoration rates during event days, and outage reporting for events impacting over 30,000 customers. NS Power must notify customers of EOC openings within 4 hours and maintain high call answer rates during outages.

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.

on track through the first four months of the year but 24 ultimately missed the target because of the cyber incident. However, NS Power met the other 25 customer service targets. In fact, NS Power significantly exceeded the targets for all...

AI summary NS Power met most customer service targets in 2025 but missed one due to a cyber incident. The Board may impose penalties or require compliance plans under the Public Utilities Act. NS Power's Five-Year Reliability Plan aims to improve reliability through grid modernization and vegetation management, though full benefits will take time.

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.

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.

Appendix D New Service Connection Times 2025 Supporting Data Average Number of Business Days (by Service Installation Type) No Pole Pole or Temporary to Line Line Transformer Permanent Extension Extension Month <10 Poles ≥10 Poles January...

AI summary Appendix D presents 2025 data on average business days for new service connection installations, categorized by type (e.g., 'No Pole', 'Pole or Temporary to Line', 'Line Extension'). Results for 2025 show performance against targets, with most categories meeting or slightly exceeding targets, except for '≥10 Poles' line extensions (4.78 vs. 13.7 target).

4.8 18 2025 Result 2.64 4.15 2.30 5.11 4.78 2025 Target 3.0 4.9 3.2 6.2 13.7 The data for the New Service Connection Times metric is extracted from Maximo using NC-SD, NC-PTX, TP, NC-LE1, and NC-LE2 order types for all completed work for t...

AI summary The document outlines communication strategies for storm days in December 2025, detailing NS Power's use of its website and social media (Twitter, Facebook) to update customers during emergencies. It references the Emergency Operations Centre (EOC) opening times and includes supporting documentation for each storm date.

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.

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 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.

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.

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.

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.

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.

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.

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.

0.15 2.16 1.32 6.19 3.33 2.17 0.77 0.43 4.28 4.71 4.57 16.24 0.79 81S-302 1.35 1.42 0.31 2.90 9.52 4.15 2.08 3.40 3.32 0.97 13.34 11.75 11.83 0.52 81S-303 3.52 2.31 1.10 1.04 8.35 3.05 3.49 4.22 6.71 1.92 1.87 21.31 14.92 11.77 2025 Perfor...

AI summary The text presents statistical data on performance standards excluding MED/EXT events, with metrics like CKAIFI and CKAIDI for 2019–2025. It includes averages, standard deviations, and thresholds for circuit interruption frequency and duration, indicating analysis of system reliability and service performance over time.

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.

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.

l customer hours (duration) of the device. The “customer hours” is calculated by multiplying the number of customers impacted by an event with the total hours (duration) of the outage. • Reliability projects are displayed as hatched rectan...

AI summary The text defines 'customer hours' as the product of impacted customers and outage duration, used in reliability metrics. It references reliability and vegetation management projects visualized in diagrams, and cites the 2025 Performance Standards Report Appendix J with matter number 85S-411.

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.

Work Depot: LIV 91W-411_2026.MXD Last revised by: Katie Chute Date revised: March 26th, 2026 2025 Performance Standards Report Appendix K Page 1 of 25

AI summary The document is titled '2025 Performance Standards Report Appendix K' and was last revised by Katie Chute on March 26, 2026. It appears to be part of a regulatory proceeding related to performance metrics, though no specific content or arguments are visible in the provided text.

Date revised: March 26th, 2026 2025 Performance Standards Report Appendix K Page 1 of 25

AI summary The text is the title page of a 2025 Performance Standards Report Appendix K, dated March 26, 2026, indicating the start of a document detailing performance metrics for a Nova Scotia regulatory proceeding. The content is limited to formatting and pagination details.

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.

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.

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.

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.

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.

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.

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.

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.

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.

.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.

40 200 Capital 10/24/2025 23H-304 08:50 17:12 503 134.02 16 Capital 10/24/2025 23H-304 08:50 17:12 502 125.44 15 Capital 10/24/2025 23H-304 08:50 17:09 499 91.54 11 Capital 10/24/2025 23H-304 08:50 17:10 501 33.37 4 Capital 10/24/2025 57C-...

AI summary The text contains a table with timestamps, event codes, and metrics (e.g., 'Capital', 'Switching'), followed by a reference to '2025 Performance Standards Report Appendix K Page 22 of 25'. The data appears to relate to operational or regulatory performance tracking, though no explicit arguments or entities are discussed.

itching 11/6/2025 70V-311 14:01 15:51 111 1.84 1 Switching 11/6/2025 70V-312 14:01 15:51 111 1.84 1 Switching 11/6/2025 70V-312 14:01 15:51 111 1.84 1 Switching 11/6/2025 70V-312 14:01 15:51 111 387.03 825 Switching 11/7/2025 36W-301 10:59...

AI summary The text presents a table from the 2025 Performance Standards Report Appendix K, containing data on events with dates, codes, durations, and categories like 'Switching' and 'Capital.' It reflects performance metrics for a regulatory proceeding, though specific context or claims are not explicitly stated.

73 2.88 1 Reliability 11/25/2025 82V-402 09:18 16:24 426 660.72 93 Reliability 11/25/2025 62N-416 09:49 15:55 366 6.10 1 Capital 11/25/2025 87W-312 14:55 15:39 44 3.64 5 Capital 11/26/2025 126H-311 21:18 00:02 163 29.96 11 Reliability 11/2...

AI summary The text presents a table of performance metrics from 2025, including dates, times, numerical values, and categories like 'Reliability' and 'Capital.' It appears to track events with associated durations, costs, and classifications, likely related to utility operations and regulatory compliance.

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.

100.00 2020-02-07 100,039 95.78 2020-02-08 41,652 99.56 2020-02-27 72,874 100.00 2022/07/01 170,993 99.09 2022/08/01 43,200 100.00 2022/01/14 22,619 99.92 2022/01/15 90,181 99.57 2022/02/03 40,551 100.00 2022/02/04 87,979 94.19 2022/02/05...

AI summary The text presents a series of dates and numerical values, potentially representing service performance metrics or event records. It is part of the '2025 Performance Standards Report Appendix L,' indicating a focus on regulatory performance monitoring and standards compliance.

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.

ieved 76V-301: 2.93 Achieved 57S-401: 2.65 Achieved 2. Customer Service Response Standards 2025 Results Standard Target 2025 Result Outcome A minimum of 70 % of calls shall be answered within 30 60.6% Not Achieved Regular Business Call sec...

AI summary NSP's 2025 Customer Service Response Standards report shows mixed results: call answer rates (60.6%) and estimated bill percentages (37.8%) fell below targets, while outage notifications met targets. Service installation times for new connections were achieved within specified thresholds.

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.

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).

ill for the customer or facility whose meter they could not access. When NS Power crews can access the meters, the customer’s bill is then adjusted retrospectively to reflect the actual meter reading. Benchmark: As a percentage of total bi...

AI summary NS Power must limit estimated bills to 2% of total bills annually, notify customers of outages promptly via multiple channels, and meet new service connection time targets based on a 5-year rolling average. Metrics exclude major/extreme event days, with a two-day service delivery floor.

rget (e.g. 2022 target). Similar to reliability metrics such as SAIDI and SAIFI, benchmarks for new service connections will also be set for normal conditions, i.e., excluding data for MEDs and EEDs. Figure 5 identifies the targets for new...

AI summary The document establishes benchmarks for new service connection times under normal conditions, excluding data from Major Event Days (MEDs) and Extreme Event Days (EEDs). It uses historical data from 2021-2025 to set 2026 targets, similar to reliability metrics like SAIDI and SAIFI, with specific timeframes for different service types.

6.5 10.8 Standard Deviation 0.4 0.6 0.7 0.8 1.6 2026 Target 3.0 4.9 3.2 6.2 12.4 Exclusion: When NS Power experiences MEDs and EEDs (as defined using the established MED and EED thresholds via the IEEE 1366-2012 Standard 2.5 and 3.5 Beta m...

AI summary The text outlines NS Power's exclusion criteria for performance standards during Major Event Days (MEDs) and Extreme Event Days (EEDs), referencing IEEE 1366-2012 standards and excluding Hurricane Dorian's outage data. It allows NS Power to omit service connection times during and after these events to account for recovery periods.

Appendix P Summary of Performance Standards Results Since 2017 Target / Target Met / Target Not Met

AI summary Appendix P summarizes performance standards results since 2017, categorizing targets as met or not met. No specific details or data are provided in the excerpt, only the structural framework of the summary.

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.

Appendix P Summary of Performance Standards Results Since 2017 Target / Target Met / Target Not Met

AI summary Appendix P summarizes performance standards results since 2017, categorizing targets as met or not met. No specific details or data are provided in the excerpt, only the structural framework of the summary.

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.

Appendix P Summary of Performance Standards Results Since 2017 Target / Target Met / Target Not Met

AI summary Appendix P summarizes performance standards results since 2017, categorizing targets as met or not met. No specific details or data are provided in the excerpt, only the structural framework of the summary.

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.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Consumer Advocate Information Requests NON-CONFIDENTIAL 1 Request IR-2: 2 3 Reference: Customer service standards and targets. 4 5 On page 27, line 12 to 13, the Repo...

AI summary Nova Scotia Power Inc. (NSPI) attributes its 2025 service level shortfall (60.6% vs. target) to a 40% year-over-year increase in workload due to higher call volume and handle times between May-December 2025. NSPI claims this increase, compared to 2024 baseline metrics, caused a ~23% service level impact.

ease would translate to a ~23 percent 29 service level impact, whereas Performance standard service level finished at 60.6 percent 30 on the year, less than 10 prcent below target. Date Filed: May 29, 2026 NSPI (CA) IR-2 Page 1 of 2 2025 A...

AI summary NSPI's 2025 Annual Performance Standards Report details service level impacts, with the Performance standard service level at 60.6% (10% below target). The report includes workforce data and responses to consumer advocate information requests, highlighting performance monitoring outcomes.

uration of the restoration response. The 6 EOC would be activated in the case of a Level 3 or 4 response as determined according to 7 Figure 1 in the ESRP and reproduced below: 8 9 10 11 The response levels outlined in the ESRP, including...

AI summary The document discusses NS Power's 2025 weather forecasting accuracy, noting it aligned with expectations despite inherent limitations. It references the Emergency Situational Response Plan (ESRP) and its activation levels for major events, emphasizing scalability without exhaustive scenario coverage. The text also cites the 2025 Annual Performance Standards Report (NSEB M12784) and NSPI's responses to consumer advocate requests.

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.

ocesses within the ESRP for all storm- 19 related activities and provides any action items and reviews as part of each Post-Event 20 Critique and its continuous improvement process. Date Filed: May 29, 2026 NSPI (CA) IR-3 Page 3 of 3 2025...

AI summary The text outlines processes within the ESRP for storm-related activities, emphasizing Post-Event Critique and continuous improvement. It also references NSPI's 2025 Annual Performance Standards Report (NSEB M12784) and responses to consumer advocate information requests.

ETRs are also updated through field validation, at 27 a single event level, or at a regional level once it is safe to assess the damage and 28 outage causes. 29 Date Filed: May 29, 2026 NSPI (CA) IR-4 Page 1 of 2 2025 Annual Performance St...

AI summary The document outlines the use of Estimated Time to Restore (ETR) during adverse weather events in 2025, referencing the 2025 Annual Performance Standards Report (NSEB M12784) and NSPI's responses to consumer advocate information requests, with forecasting details in CA IR-03.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to information requests from an industrial group, focusing on performance metrics and compliance. The document is marked non-confidential and relates to regulatory oversight of energy sector operations.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to information requests from an industrial group, focusing on performance metrics and compliance. The document is marked non-confidential and relates to regulatory oversight of energy sector operations.

1 Request IR-1: 2 3 Reference: NSPI states at page 17, lines 10-23: 4 5 “As performance improves across all 405 feeders, the overall number 6 of outages experienced by customers is reduced. However, the 7 standards for measuring problem fe...

AI summary NSPI explains that improved system performance leads to more stringent feeder performance thresholds, reducing the CKAIFI threshold by 16% in 2025 compared to 2024. NSPI frames this as a positive outcome for customers, emphasizing that stricter thresholds result from overall system improvements. The response clarifies that NSPI does not view the updated thresholds as disadvantageous but as a reflection of progress.

tcomes. 32 33 (b) As NS Power has previously stated in previous Performance Standards filings, the 34 changing CKAIDI and CKAIFI targets are a result of overall improvement on the system Date Filed: May 29, 2026 NSPI (IG) IR-1 Page 1 of 2...

AI summary NSPI explains that changes in CKAIDI and CKAIFI targets stem from system improvements and evolving performance standards. NSPI asserts current thresholds and calculations remain appropriate, reflecting increasingly stringent standards over time.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to information requests from an industrial group, focusing on performance metrics and compliance. The document is marked non-confidential and relates to regulatory oversight of energy sector operations.

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.

NSPI (IG) IR-2 Page 2 of 2 2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL

AI summary The document outlines NSPI's responses to Industrial Group information requests related to the 2025 Annual Performance Standards Report (NSEB M12784). It focuses on NSPI's compliance with regulatory performance metrics and disclosure obligations under the Nova Scotia Energy Board proceeding.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to information requests from an industrial group, focusing on performance metrics and compliance. The document is marked non-confidential and relates to regulatory oversight of energy sector operations.

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.

025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL

AI summary The document references NSPI's responses to information requests from an industrial group regarding the Annual Performance Standards Report (NSEB M12784). It highlights NSPI's engagement with regulatory transparency requirements under the Nova Scotia Energy Board's oversight.

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.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to information requests from an industrial group, focusing on performance metrics and compliance. The document is marked non-confidential and relates to regulatory oversight of energy sector operations.

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.

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.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL 1 Request IR-8: 2 3 Reference: Appendix I. 4 5 (a) For each feeder-year where Appendix I reports CKAIFI and/or...

AI summary NSPI explains that '0.00' in Appendix I indicates low but valid outage data (rounded below 0.005), while blanks signify no data. This clarifies how NSPI reports CKAIFI/CKAIDI values in its 2025 performance standards, addressing data interpretation and reporting practices.

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).

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.

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.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL

AI summary The document outlines NSPI's responses to the Nova Scotia Energy Board's information requests regarding the 2025 Annual Performance Standards Report. It highlights regulatory compliance and performance monitoring under NSEB oversight.

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.

2021 2.28 +11% 2022 2.19 -4% 2023 2.18 -<1% Date Filed: May 29, 2026 NSPI (NSEB) IR-4 Page 1 of 2 2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL Year...

AI summary NSPI's SAIFI values decreased from 2.28 in 2021 to 1.57 in 2025, indicating improved service reliability. The report, part of the NSEB M12784 proceeding, details NSPI's performance against annual standards.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL

AI summary The document outlines NSPI's responses to the Nova Scotia Energy Board's information requests regarding the 2025 Annual Performance Standards Report. It highlights regulatory compliance and performance monitoring under NSEB oversight.

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.

,342 80,675 2025 117,911 258,989 100,053 81,107 19 20 (b) Please refer to Attachment 1. 21 22 (c) Please refer to Attachment 2 and 3. 23 Date Filed: May 29, 2026 NSPI (NSEB) IR-7 Page 2 of 3 2025 Annual Performance Standards Report (NSEB M...

AI summary The document references the 2025 Annual Performance Standards Report (NSEB M12784) and NSPI's responses to Nova Scotia Energy Board information requests, with attachments cited for detailed data. The filing date is May 29, 2026.

73 65 Provincial 83 74 66 72 72 15 16 Business Customer Satisfaction: Ability to Restore Power Quickly Region 2021 2022 2023 2024 2025 West 88 83 81 84 83 Metro 78 75 71 76 80 Northeast 88 84 74 75 81 Cape Breton 85 82 70 74 72 Provincial...

AI summary The text presents tables showing provincial and regional business customer satisfaction metrics for power restoration speed (2021-2025) and distribution line lengths by voltage class (2025). Data highlights regional performance variations and infrastructure metrics, part of a 2025 Annual Performance Standards Report submitted to the Nova Scotia Energy Board (NSEB).

19.50% 12.19% 21.34% 12.51% 0.85% 0.18% 16.09% West 2024 19.27% 2.10% 25.27% 2.71% 19.84% 12.31% 0.50% 0.15% 17.85% West 2025 29.53% 1.47% 22.04% 0.70% 19.18% 8.79% 0.86% 0.57% 16.85% 2025 Annual Performance Standards Report IR-7 Attachmen...

AI summary The text references the 2025 Annual Performance Standards Report (NSEB M12784), noting that NSPI submitted responses to NSEB information requests. Attachments 3-5 of the report were filed electronically, with the content marked as non-confidential.

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.

coded as Failed Equipment 13 for years 2020 to 2025. 14 Year Events 2020 3,530 2021 3,083 2022 2,942 Date Filed: May 29, 2026 NSPI (NSEB) IR-8 Page 3 of 4 2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Inform...

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to NSEB information requests, including corrected data on equipment failure rates (18% erroneously stated, corrected to 14%) and references to the 2026 ACE Plan (M12619). Failure events declined from 3,530 in 2020 to 2,091 in 2025.

which NS Power completed vegetation management work in those years (exclusive of 31 any outages associated with MEDs and EEDs) please provide a table identifying the 32 following: Date Filed: May 29, 2026 NSPI (NSEB) IR-9 Page 1 of 4 2025...

AI summary NSPI responds to NSEB's information request regarding performance standards and vegetation management expenditures. The request includes data on customer interruptions, interruption hours, CAIDI/SAIDI/SAIFI indices, and annual O&M and capital vegetation management costs from 2019-2025.

n the table below for customer interruptions (CI), customer hours 24 of interrutuption (CHI), and customer average interruption duration index (CAIDI or 25 SAIDI/SAIFI). 26 27 28 29 Date Filed: May 29, 2026 NSPI (NSEB) IR-9 Page 2 of 4 202...

AI summary The text references a table with performance metrics on customer interruptions and indices (CAIDI, SAIDI/SAIFI) and mentions the 2025 Annual Performance Standards Report (NSEB M12784) and NSPI's responses to NSEB information requests.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to NSEB information requests. The document is marked non-confidential and pertains to regulatory oversight of performance metrics under Nova Scotia's energy governance framework.

2022 138,001 521,665 3.78 2023 118,759 421,160 3.55 2024 136,042 408,063 3.00 2025 120,002 330,618 2.76 9 10 11 Date Filed: May 29, 2026 NSPI (NSEB) IR-9 Page 3 of 4 2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to...

AI summary The document includes a 2025 Annual Performance Standards Report (NSEB M12784) and NSPI's responses to NSEB information requests. It contains numerical data spanning 2022-2025, though metrics are not explicitly labeled. The filing date is May 29, 2026, and the content is marked non-confidential.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 (d) Period Year 1 CHI Year 2 CHI % Change 2020-2025 265,629 330,618 -24% 2023-2024 421,160 408,063 3% 2024-2025 408,063 3...

AI summary NSPI provides data on vegetation management performance metrics and spending (2019-2025), noting inconsistencies in year-over-year comparisons due to varying line work volumes. Tables show O&M and capital expenditures, with NS Power questioning the relevance of the analysis to vegetation management effectiveness.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to NSEB information requests. The document is marked non-confidential and pertains to regulatory oversight of performance metrics under Nova Scotia's energy governance framework.

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.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to NSEB information requests. The document is marked non-confidential and pertains to regulatory oversight of performance metrics under Nova Scotia's energy governance framework.

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.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 Request IR-13: 2 3 Page 10 of the report notes that the targeted reliability work on 46 priority feeders across 4 the pro...

AI summary The NSEB requested details on NSPI's 2025 investments in 46 priority feeders, including investment breakdowns, selection criteria, and performance metrics. NSPI directed responses to an attachment and another proceeding, citing asset management and metrics like CKAIDI and CKAIFI to evaluate effectiveness.

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.

55V-314 Berwick, Aylesford and Burlington West 55V-314 Berwick, Aylesford and Burlington 23 24 25 2025 Trip Saver Additions Project (CI # C0070366): Date Filed: May 29, 2026 NSPI (NSEB) IR-14 Page 1 of 2 2025 Annual Performance Standards R...

AI summary The document references the 2025 Trip Saver Additions Project (CI # C0070366), filed on May 29, 2026, and NSPI's responses to NSEB information requests. It includes the 2025 Annual Performance Standards Report (NSEB M12784), indicating regulatory oversight of performance metrics and compliance processes.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to NSEB information requests. The document is marked non-confidential and pertains to regulatory oversight of performance metrics under Nova Scotia's energy governance framework.

1 Region Feeder Quantity East 57S-401 1 East 81S-301 1 East 85S-401 1 Northeast 4N-313 1 Northeast 56N-414 1 Northeast 6N-301 1 Metro 113H-433 1 West 57W-401 2 West 70W-311 1 West 78W-301 1 West 80W-301 1 West 91W-411 4 2 3 4 2020 RTU Depl...

AI summary The text lists regions, feeders, and substations for the 2020 RTU Deployment Project (CI# C0021109), referencing Undertaking U-05 in 2026 ACE M12619 for cost details. NS Power will continue monitoring CKAIDI and CKAIFI metrics, indicating ongoing performance tracking.

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.

NSPI (NSEB) IR-15 Page 1 of 1 2025 Annual Performance Standards Report NSEB IR-15 Attachment 1 Page 1 of 1

AI summary The document is the 2025 Annual Performance Standards Report submitted by Nova Scotia Power Inc. (NSPI) to the Nova Scotia Energy Board (NSEB), focusing on performance monitoring and regulatory compliance.

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-16: 2 3 Regarding Figures 1 and 2 on pages 12-13: Please provide a similar Figure to show the 4 customer avera...

AI summary NSPI explains that while CAIDI (Customer Average Interruption Duration Index) is an informative metric, it can be misleading when considered alone. In 2025, improvements in SAIFI and SAIDI were offset by a larger SAIFI improvement, causing CAIDI to rise despite overall performance gains.

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.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 Request IR-18: 2 3 Regarding Figure 3 on page 16 of the report: 4 5 (a) Does NS Power agree that the current SAIDI perfor...

AI summary NSPI confirms the SAIDI performance target includes outages from foreign interference, using a 5-year average plus one standard deviation. The response explains the methodology for setting the target and references a comparison table (not included here) showing performance with and without foreign interference outages.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to NSEB information requests. The document is marked non-confidential and pertains to regulatory oversight of performance metrics under Nova Scotia's energy governance framework.

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.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M12784) details NSPI's responses to NSEB information requests. The document is marked non-confidential and pertains to regulatory oversight of performance metrics under Nova Scotia's energy governance framework.

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.

2025 Annual Performance Standards Report (NSEB M1784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL

AI summary The 2025 Annual Performance Standards Report (NSEB M1784) details NSPI's responses to information requests from the Nova Scotia Energy Board. The document outlines NSPI's compliance with regulatory requirements and performance metrics, focusing on transparency and accountability in its operations.

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.

urrent levels. Depending on the 15 specific circumstances of a feeder, NS Power would continue to submit data-driven, risk- 16 based mitigation programs and projects as appropriate. Date Filed: May 29, 2026 NSPI (NSEB) IR-20 Page 2 of 2 20...

AI summary NSPI clarifies a discrepancy in its 2025 Annual Performance Standards Report, confirming feeder 57W-402 (not 57W-401) exceeded the CKAIFI threshold, as shown in Figure 36. The response addresses an NSEB query about data accuracy in Exhibit N-1.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-22: 2 3 Regarding s. 3.1 of the report, on page 24, NS Power says: 4 5 Billing inquiries i...

AI summary NSPI responds to NSEB's query about the historical time frame used for billing inquiry metrics in the 2025 Annual Performance Standards Report. NSPI states the baseline was the average call volumes and escalations from May–December 2023 and 2024, following a cyber incident that increased call volumes by ~46% and support by ~189%.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL

AI summary The document outlines NSPI's responses to the Nova Scotia Energy Board's information requests regarding the 2025 Annual Performance Standards Report. It highlights regulatory compliance and performance monitoring under NSEB oversight.

wires down) rather than routine traffic. The contingency site is limited by physical space 30 and phone lines available, but additional desks were added following the cyber incident to Date Filed: May 29, 2026 NSPI (NSEB) IR-26 Page 1 of 2...

AI summary The document outlines NSPI's handling of call prioritization during a cyber incident, noting the addition of desks to manage high-priority communications. It references the 2025 Annual Performance Standards Report (NSEB M12784) and NSPI's responses to NSEB information requests, emphasizing contingency measures for critical communications.

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.

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.

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.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL

AI summary The document outlines NSPI's responses to the Nova Scotia Energy Board's information requests regarding the 2025 Annual Performance Standards Report. It highlights regulatory compliance and performance monitoring under NSEB oversight.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL

AI summary The document outlines NSPI's responses to the Nova Scotia Energy Board's information requests regarding the 2025 Annual Performance Standards Report. It highlights regulatory compliance and performance monitoring under NSEB oversight.

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).

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL

AI summary The document outlines NSPI's responses to the Nova Scotia Energy Board's information requests regarding the 2025 Annual Performance Standards Report. It highlights regulatory compliance and performance monitoring under NSEB oversight.

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.

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.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Therefore, these planned events are not included in the calculation of the Performance 2 Standards SA...

AI summary NSPI explains that planned switching outages are excluded from SAIDI calculations, which contributed to missing SAIDI targets. They acknowledge customer impacts but emphasize the necessity of outages for system work and safety, while detailing mitigation efforts like careful planning and minimizing outage duration.

(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 NS Power did not meet 4 of 5 New Service Connection thresholds in November 2025. While no major or extreme weather events were recorded, repeated smaller weather disruptions affected productivity and scheduling, contributing to the failure to meet performance standards.

HEARING ORDER On March 31, 2026, NS Power filed its 2025 Annual Performance Standards Report. Under s. 52D(4) of the Public Utilities Act , following the receipt of this report, the Board may order NS Power to pay an administrative penalty...

AI summary NS Power filed its 2025 Annual Performance Standards Report. The Board may impose penalties or require compliance plans if NS Power failed to meet performance standards under the Public Utilities Act. The proceeding will be a paper hearing with a detailed timetable for interventions, evidence, and arguments, governed by the Board's Regulatory Rules.

HEARING ORDER M12784 NOVA SCOTIA ENERGY BOARD IN THE MATTER OF THE PUBLIC UTILITIES ACT - and - IN THE MATTER OF a review of NOVA SCOTIA POWER INCORPORATED’s 2025 Annual Performance Standards Report BEFORE: Stephen T. McGrath, K.C., Chair...

AI summary The Nova Scotia Energy Board has initiated a paper hearing to review Nova Scotia Power Inc.'s 2025 Annual Performance Standards Report under the Public Utilities Act. The Board may impose penalties or require compliance plans if performance standards are unmet, with procedural deadlines set for interventions and evidence submissions.

Matter No. M12784 NOVA SCOTIA ENERGY BOARD IN THE MATTER OF: The Public Utilities Act - and - IN THE MATTER OF: A review of Nova Scotia Power Incorporated's 2025 Annual Performance Standards Report NOTICE OF INTERVENTION OF: SMALL BUSINESS...

AI summary The Small Business Advocate intervenes in a proceeding under the Public Utilities Act, reviewing Nova Scotia Power's 2025 Annual Performance Standards Report. They represent three small business classes (10, 11, 21) and request communication directed to their legal counsel. The intervention highlights potential impacts on small business interests.

2026 M12784 NOVA SCOTIA ENERGY BOARD IN THE MATTER OF: The Public Utilities Act, RSNS 1989, c 380 as amended - and - IN THE MATTER OF: a review of NOVA SCOTIA POWER INCORPORATED’s 2025 Annual Performance Standards Report NOTICE OF INTERVEN...

AI summary The Nova Scotia Department of Energy intervenes in a proceeding under the Public Utilities Act and a review of Nova Scotia Power's 2025 Annual Performance Standards Report. The Department asserts oversight of energy matters and requests communication with specified contacts.

M12784 NOVA SCOTIA ENERGY BOARD IN THE MATTER OF the PUBLIC UTILITIES ACT -and- IN THE MATTER OF a review of NOVA SCOTIA POWER INCORPORATED’s 2025 Annual Performance Standards Report LIST OF PARTICIPANTS NOVA SCOTIA POWER INC. (NS Power) L...

AI summary The Nova Scotia Energy Board is reviewing NS Power's 2025 Annual Performance Standards Report under the Public Utilities Act. Key participants include NS Power, Board Counsel, and the Consumer Advocate. The proceeding involves regulatory oversight of utility performance and public interest considerations.

1 M12784 2 3 NOVA SCOTIA ENERGY BOARD 4 5 6 IN THE MATTER OF: The Public Utilities Act 7 8 – and – 9 10 IN THE MATTER OF: A review of NOVA SCOTIA POWER INCORPORATED’s 11 2025 Annual Performance Standards Report 12 13 14 15 16 17 INFORMATIO...

AI summary The Consumer Advocate has issued an information request to Nova Scotia Power Inc. under the Public Utilities Act, seeking details on their 2025 Annual Performance Standards Report. Responses are due by May 29, 2026, with copies to be submitted to Pink Larkin.

1 2026 M12784 2 3 NOVA SCOTIA ENERGY BOARD 4 IN THE MATTER OF: The Public Utilities Act 5 IN THE MATTER OF: A Review of NOVA SCOTIA POWER INCORPORATED’s 2025 6 Annual Performance Standards Report 7 8 INFORMATION REQUESTS To: Nova Scotia Po...

AI summary The Industrial Group requests clarification from Nova Scotia Power Incorporated (NSPI) regarding its 2025 Annual Performance Standards Report, specifically questioning how improved feeder performance standards may paradoxically increase stringency as performance improves, potentially impacting outage reduction metrics.

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.

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.

M12784 NOVA SCOTIA ENERGY BOARD IN THE MATTER OF: THE PUBLIC UTILITIES ACT - and - IN THE MATTER OF: A REVIEW of NOVA SCOTIA POWER INCORPORATED’s 2025 Annual Performance Standards Report INFORMATION REQUESTS To: Nova Scotia Power Incorpora...

AI summary The Nova Scotia Energy Board has issued an information request to Nova Scotia Power Inc. regarding their 2025 Annual Performance Standards Report under the Public Utilities Act. Responses are due by May 29, 2026, with contact details provided for submission.

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.

ents on these feeders and how they will be tracked. 25 26 Request IR-14: 27 Page 11 of the report notes that 6 substations and 23 downline protective devices were upgraded 28 to include remote control and telemetry. Engineering planning an...

AI summary The text requests details on completed grid modernization projects involving 6 substations and 23 protective devices, including costs and performance metrics aimed by the utility. Upgrades included remote control and telemetry, with further procurement planned for 2026. The focus is on outage reduction through infrastructure improvements.

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.

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.

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.

1 M12784 2 3 NOVA SCOTIA ENERGY BOARD 4 5 IN THE MATTER OF: The Public Utilities Act, R.S.N.S. 1989, c. 380, as amended. 6 7 IN THE MATTER OF: A review of Nova Scotia Power Incorporated’s 2025 Annual 8 Performance Standards Report 9 10 11...

AI summary The Nova Scotia Energy Board has issued information requests to Nova Scotia Power, Inc. (NS Power) regarding its 2025 Annual Performance Standards Report under the Public Utilities Act. Responses are due by May 29, 2026, with inquiries directed to Jennifer Ross at NS Power and Melissa P. MacAdam of Blackburn Law Inc., acting as the Small Business Advocate.

ines 1-3, inclusive of footnote 8. 25 26 a) Who prepared Figure 60, NS Power or Electricity Canada and when was it prepared? 27 b) If NS Power, or its consultants, prepared Figure 60, please describe the process followed 28 to prepare it,...

AI summary The text contains regulatory inquiries directed at Nova Scotia Power (NSP) regarding data sources, methodology for figures, compliance with IEEE standards, monitoring of reliability metrics, and customer complaints about service reliability. Questions focus on transparency, accountability, and adherence to regulatory requirements.

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.

June 17, 2026 Crystal Henwood Clerk of the Board Nova Scotia Energy Board 1601 Lower Water Street, 3rd Floor Halifax, NS B3J 3S3 Re: M12786 – Nova Scotia Power Inc. 2025 Performance Standards Report Dear Ms. Henwood: Nova Scotia Power Inc....

AI summary NS Power submitted its 2025 Performance Standards Report, requesting a two-week extension for closing arguments due to resource constraints and commitments to other reviews. The Nova Scotia Energy Board issued a hearing order, with deadlines for responses and arguments.

2025 Annual Performance Standards Report NS Power Closing Arguments July 3, 2026 NON-CONFIDENTIAL - On March 31, 2026, Nova Scotia Power Inc. (NS Power or the Company) filed its 2025 Annual - Performance Standards Report (Report) with the...

AI summary NS Power submitted its 2025 Annual Performance Standards Report to the Nova Scotia Energy Board. The Board issued a Hearing Order allowing information requests, with responses due on May 29, 2026. No additional evidence was filed by intervenors, and NS Power's closing submission is outlined.

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.

up>1 2024 NSUARB 115, para. 64. M11627, Decision Letter, September 9, 2024, page 15. & lt;sup>3 See M11627 Decision, p 15. & lt;sup>4 M12185 Decision Letter, pages 14-15. Crystal Henwood July 3, 2026 Page 3 established[.](#page-2-0) 5 With...

AI summary The Board emphasized the need for NSPI to develop quantitative tools to assess the effectiveness of reliability investments under the Five-Year Reliability Plan. Despite previous directions, NSPI has not yet established such tools, and it acknowledges the difficulty of separating the impact of reliability investments from other factors like weather.

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.

Administrative Penalty Under the PUA , the Board has authority to take measures to ensure NSPI's compliance with the performance standards, including ordering NSPI to pay an administrative penalty, to develop and file a plan to bring itsel...

AI summary The document discusses the possibility of imposing an administrative penalty on NSPI under the Public Utilities Act for failing to meet performance standards for nine consecutive years. The Industrial Group supports such a penalty, emphasizing that it should benefit FAM customers and be applied through the FAM credit system. The FAM balance is currently $125 million.

Conclusion In summary, the Industrial Group respectfully submits that: - 1. NSPI should file in its Annual Performance Standards Report, a program-level attribution analysis identifying the SAIDI improvement estimated to result from each c...

AI summary The Industrial Group submits several recommendations to NSPI and the Board regarding performance standards, including the need for detailed reporting on SAIDI improvements, transmission loss of supply analysis, and the inclusion of customer-level metrics in performance standards. They also suggest penalties under the PUA be credited to the FAM for customer benefit.

Re: M12784 - Nova Scotia Power Inc. - 2025 Annual Performance Standards Report On March 31, 2026, Nova Scotia Power Inc. ("NS Power") filed its 2025 Annual Performance Standards Report ( the "Report"), which detailed that it had achieved 9...

AI summary NS Power submitted its 2025 Annual Performance Standards Report, achieving 9 of 14 Board-approved standards. The Small Business Advocate (SBA) will address the missed standards, which include reliability metrics and customer service indicators, in reverse order.

CKAIDI and CKAIFI Under these metrics, NS Power must identify their chronic circuits from the previous year18 and take steps to address them and ensure that they meet the stated targets. In 2025, circuit 85S-401 missed the CKAIDI target an...

AI summary NS Power is required to address chronic circuits that have not met performance standards, such as CKAIDI and CKAIFI targets. Specific circuits, like 85S-401 and 57W-401, have failed to meet these metrics for several years. The SBA argues that after years of investment in vegetation management and infrastructure improvements, there should be noticeable improvement. However, NS Power's responses do not clarify the extent of their planned actions.

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's 2025 Annual Performance Standards Report highlights progress in reducing outage frequency and duration 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 bill percentages. The report also notes apparent improvements from vegetation management and tree trimming efforts.

11 2026 Standards 12 - 13 The Consumer Advocate takes no issue with the performance targets for 2026 proposed in the - 14 Report. They are generally consistent with the targets which were in place for 2025. 15 - 16 However, the threshold f...

AI summary The Consumer Advocate supports the 2026 performance targets but suggests flexibility in the threshold for requiring Outage Reports, arguing that such reports could be beneficial even for events affecting fewer than thirty thousand customers.

20 Conclusion 21 - 22 This is the ninth consecutive year in which Nova Scotia Power has failed to meet one or more of - 23 its performance targets. In closing submissions on the 2024 Annual Performance Standards Report - 24 (M12185), the C...

AI summary Nova Scotia Power has repeatedly failed to meet performance targets, leading the Consumer Advocate to recommend an administrative penalty. While there have been some improvements in reliability metrics, the Board must decide if these are sufficient to avoid another penalty for 2025 performance.

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.

track to achieve the targeted 20% SAIDI improvement by 2029. With respect to the request to file program-level analysis, NS Power identifies program-level DATE FILED: July 17, 2026 Page 10 of 15 benefits (such as reliability benefits due t...

AI summary The Industrial Group (IG) acknowledges improvements in NS Power's 2025 reliability performance but expresses concern that the record lacks a reliable basis to determine how much of the improvement is attributable to the Reliability Plan versus a milder weather year. The IG requests that NS Power provide a program-level attribution analysis for its next Annual Performance Standards Report.

with the transmission or distribution system components. 1 2 3 4 5 6 7 8 The issue for the Industrial Group is not the availability of data but the form in which the information is presented. The trend data shows a sustained increase in pl...

AI summary The Industrial Group argues that the presentation of planned outage data in aggregate form prevents the Board from assessing how planned outages impact customers and locations across the system. They recommend disaggregating the data by feeder or substation groupings in future Annual Performance Standards Reports to better identify patterns and distribution.