3 AAC 52.495 - Electric service reliability rules

(a) To the extent necessary to calculate and report reliability indices as required under 3 AAC 52.490 - 3 AAC 52.495, an electric utility shall comply with IEEE Standard 1366, IEEE Guide for Electric Power Distribution Reliability Indices, revised as of May 14, 2012 (IEEE 1366-2012) and adopted by reference. If there is a conflict between any provision in IEEE Standard 1366 and 3 AAC 52.490 - 3 AAC 52.495, the provisions of 3 AAC 52.490 - 3 AAC 52.495 govern.

(b) An electric utility shall include both "distribution system" outages and "interruptions caused by events outside of the distribution system" as defined in IEEE Standard 1366 in the electric utility's record keeping, calculations, reporting, and filing as required under 3 AAC 52.490.

(c) Except as provided in (d) of this section, an electric utility shall keep an accurate record of each outage that affects one or more customers. Each record must contain at least

(1) the date and time the outage occurred; if the exact time is unknown, the beginning of an outage is recorded as the earlier of an automatic alarm or the reported initiation time;

(2) the date and time service was restored;

(3) the number of customers affected by the outage; and

(4) the cause of the outage, if known.

(d) For outages after which an electric utility cannot obtain accurate data, the electric utility shall make reasonable estimates.

(e) An electric utility shall retain for at least five full calendar years the records associated with (c) of this section.

(f) Using records collected under (c) and (d) of this section, after December 31 of each year an electric utility shall calculate the system average interruption duration index (SAIDI), system average interruption frequency index (SAIFI), and customer average interruption duration index (CAIDI) for the previous reporting period. These indices are to be calculated for

(1) the certificated service area; and

(2) each reliability reporting area.

(g) When accurate data is not available, an electric utility may use estimates in calculating actual SAIDI, SAIFI, or CAIDI indices required under (f) of this section.

Notes

3 AAC 52.495

Eff. 11/22/2017,Register 224, January 2018

Authority: AS 42.05.141

AS 42.05.151

AS 42.05.291