Topic/Matter Intersection

Topic:"Distribution Planning" in M12707

Matter: Nova Scotia Power Inc. - Storm Outage Analysis Report - December 3, 2025
9 passages 2 documents

Distribution Planning across all matters →

N-1December 3, 2025 - Storm Outage Analysis Report 7 passages
SECTION 4: PROVINCIAL IMPACT SUMMARY – DECEMBER 3 p. pp. 4-5
SECTION 4: PROVINCIAL IMPACT SUMMARY – DECEMBER 3 CB West CB East This map presents a geospatial view of the overall impact to the province by customer hours of impact (CHI). This map is a symbolized view of impacted areas by 8 geographica...

AI summary On December 3, 2025, Nova Scotia experienced a severe weather event with wind, snow, and rain causing power outages. Over 300 field resources were deployed to restore power, and the impact was visualized through a geospatial map and a table showing restoration percentages within specific timeframes.

p. pp. 6-8
1 1 1 1 1 1 // \ 5 CB West 12/3/2025 8:02 Grand Étang 50 30 76 1 Tree Contacts Falling Trees High winds and heavy snow caused trees to contact the lines. 165 28.83 CB East 12/3/2025 17:43 Sydney 340 44 87 2 Failed/ Damaged Equipment Electr...

AI summary The document details multiple power outages in Nova Scotia caused by severe weather conditions, including high winds, heavy snow, and heavy rain. These outages were due to falling trees and equipment failure, impacting thousands of customers across different regions.

Customers Restored within X hours of Storm Onset p. pp. 9-23
Customers Restored within X hours of Storm Onset Valley % Within 6 Hrs 19.40% Within 12 Hrs 77.38% Within 24 Hrs 95.56% Within 48 Hrs 100.00% This table represents the percentage of customers restored within 6, 12, 24, or 48 hours of the s...

AI summary The table shows the percentage of customers in Valley restored within specific timeframes after a storm, with 95.56% restored within 24 hours and 100% within 48 hours. The average restoration time was 14.47 hours.

\ elapsed time from first outage event to restoration of last event Customers Restored within X hours of Storm Onset p. p. 11
\ elapsed time from first outage event to restoration of last event Customers Restored within X hours of Storm Onset South Shore % Within 6 Hrs 63.34% Within 12 Hrs 98.10% Within 24 Hrs 99.98% Within 48 Hrs 100.00% This table represents th...

AI summary The table shows the percentage of customers in the South Shore region who were restored within specific timeframes after the storm, with 63.34% restored within 6 hours and 100% within 48 hours. The average restoration time for the region was 4.39 hours.

Preamble p. pp. 21-23
Adverse Weather Cause of Outage (CHI) \ elapsed time from first outage event to restoration of last event

AI summary The document includes figures and images related to adverse weather as a cause of outages (CHI), specifically referencing elapsed time from the first outage event to the restoration of the last event. No textual analysis is provided in the chunk.

Duration p. pp. 21-22
Duration Zone Date/ Time Weather Station Direction (Degrees) Max Wind Gusts (km/h) Temp (°C) Cause Sub-Cause Description Customer s Impacted Duration (Hours) Cape Breton West 12/3/2 025 8:02 Grand Étang 50 30 54 1 Tree Contacts Falling Tre...

AI summary The document details outage events in the Cape Breton West zone, caused by high winds, heavy snow, and falling trees, impacting a total of 1,511 customers with durations ranging from 2.19 to 28.83 hours.

- In both December 3, 2025 and December 13, 2022 events, only a few regions experienced significant impacts, while the remaining regions saw minimal disruption. p. pp. 24-25
- In both December 3, 2025 and December 13, 2022 events, only a few regions experienced significant impacts, while the remaining regions saw minimal disruption. Event December 3, December 13, 2025 2022 Customers Interrupted 56,114 48,944 C...

AI summary Two significant weather events occurred on December 3, 2025, and December 13, 2022, causing power outages in Nova Scotia. While only a few regions experienced significant impacts, the majority saw minimal disruption. The number of customers interrupted and the hours of interruption varied between the two events.

N-2NSPI (NSEB) RIRs 1-9 2 passages
1 Request IR-1:
Storm Outage Analysis Report December 3, 2025 IR-01 Confidential Attachment 1 has been filed electronically. 1 Request IR-1: 2 3 For this outage report, using December 3, 2025, 00:00 to December 3, 2025, 20:00 as the time 4 axis, please pr...

AI summary The document requests a comparison between forecast and actual weather conditions for eight regions in Nova Scotia for a specific time period. The response notes that forecast data from NS Power's vendor is provided in three-hour blocks, leading to a mismatch in granularity, and highlights the lack of uniform precipitation data collection across regions.

Date Source Incident CI CH Duration (Hrs) CEA Description Sub-Cause Device Failed
Date Source Incident CI CH Duration (Hrs) CEA Description Sub-Cause Device Failed 2025-12-03 70V-312 INC 47005056 7 112.3418 16.04883333 Defective EquipmentMechanical Failure Automatic Splice 2025-12-03 81S-303 INC 47005109 1 1.72 1.72 Def...

AI summary The document presents a list of incidents involving defective equipment and mechanical failures across various locations, detailing the date, source, incident number, customer impact, duration, and the specific device that failed. It also includes a request for an evaluation of restoration prioritization practices.

Disclaimer: These summaries were generated by AI from the filings they describe. We take care to make them accurate, but errors are possible - and they aren't advice. Only the filings themselves are the record: if you're relying on something here, confirm it against the source documents or the Nova Scotia Energy Board's own record. Full disclaimer →