Topic:"Unplanned Outage" in M12878

Outage Restoration Profile: Metric Result Unique Customers Impacted 65,545 Customer Interruptions 82,355 Total Customer Hours 274,172 Event Start Time March 17 00:31 Event End Time March 17 19:25 Main Regions Impacted Halifax, CB East

AI summary An outage restoration profile reports that 65,545 unique customers were impacted, with 82,355 customer interruptions and 274,172 total customer hours affected during an event that started on March 17 at 00:31 and ended at 19:25. The main regions impacted were Halifax, CB, and East.

\ \ 91.52% of customers were restored prior to the stormy weather ceasing. Average restoration time for the storm was 4.50 hrs. Zone Customers Impacted (CI) Unique Customers Impacted Customer Hours of Interruptions (CHI) Valley 346 346 928...

AI summary The document provides statistics on customer restoration during a storm, indicating that 91.52% of customers were restored before the storm ended, with an average restoration time of 4.50 hours. A table details the number of customers impacted and customer hours of interruptions across different zones in Nova Scotia.

SECTION 4: PROVINCIAL HIGHLIGHTS Zone Date/ Time Weather Station Direction (Degrees) Max Wind Gusts (km/h) Temp (°C) Cause Sub-Cause Description Customers Impacted Duration (Hours) Halifax 3/17/2026 4:51 Halifax Airport 180 37 65 12 Tree C...

AI summary This section presents a table of power outages in Nova Scotia, including details such as location, date and time, weather conditions, cause, number of customers impacted, and duration. The data highlights incidents caused by tree contacts and scheduled outages.

Adverse Weather Cause of Outage (CHI) \ elapsed time from first outage event to restoration of last event

AI summary The document presents figures related to adverse weather causing outages, specifically focusing on Customer Hours of Interruption (CHI) and elapsed time from the first outage event to the restoration of the last event.

SECTION 5: COMPARISON TO SIMILAR OUTAGE EVENTS - The March 17, 2026 event and July 9-10, 2021 events (Tropical Storm Elsa) were both wind- and rain-driven events, with comparable peak wind gusts (85 km/h and 81 km/h). While Elsa developed...

AI summary This section compares two outage events: March 17, 2026, and July 9-10, 2021 (Tropical Storm Elsa). Both were wind- and rain-driven, with similar peak wind gusts. Tree contacts were the main cause of outages in both, and both affected all regions, though impacts were concentrated in two primary areas.

Request IR-6: (a) Please provide the number and percentage of outage events for which an initial estimated restoration time was issued; (b) The accuracy of estimated restoration times including the percentage restored within one to four ho...

AI summary The response to Request IR-6 indicates that all outage events received an initial estimated restoration time, and Table 1 provides the accuracy of these estimates, including the percentage of events restored within ±4 and ±2 hours of the communicated estimate, as well as before the estimated time.

Request IR-2: Please explain the criteria used to determine whether an outage was attributed to the event, including outages beginning after peak weather conditions had passed.

AI summary The document requests an explanation of the criteria used to determine whether an outage was attributed to a specific event, including outages that occurred after peak weather conditions had passed.

Request IR-3: - For the circuits associated with the largest tree related events by customer hours of interruption, - please provide: - a) The number of tree contact outage events, customer interruptions and customer hours of interruption...

AI summary Request IR-3 asks for information on tree-related outages, including the number of events, customer interruptions, and history of vegetation management work by region and circuit.

Request IR-6: . - a) Please provide the number and percentage of outage events for which an initial estimated restoration time was issued; - b) The accuracy of estimated restoration times including the percentage restored within one to fou...

AI summary Request IR-6 seeks information on outage events, specifically the number and percentage of events with initial estimated restoration times and the accuracy of these estimates, including the percentage of outages restored within one to four hours of the communicated estimates.