Circuit Reliability Review

Transcription

1 Circuit Reliability Review Rialto January 2018

2 Building a Smarter Grid for Southern California Southern California Edison is developing an electric grid to support California s transition to a clean and sustainable future that meets the needs and expectations of our customers. We are investing more than $13 billion in the power distribution grid over three years ( ). Our main investment goal is to increase power reliability through significant upgrades. The investments include: Upgrading cables, poles, switches and transformers Updating the grid so it can accommodate new technologies, such as smart inverters that will allow for the twoway flow of solar energy Adapting the power system to accommodate future California policy related to energy storage, electric transportation and renewable energy Providing enhanced automation and monitoring devices to allow us to better respond to changes on the grid Our investments in local communities will help ensure that customers receive safe, reliable, and affordable electricity now and in the future. Learn more at edison.com/innovation 2

3 Understanding Your Reliability Report As your electric utility, we want you to always have power when you need it. To get there, we constantly track and monitor electric outages across our service territory, and we measure our system reliability from this data. The two metrics we rely on are common in the electric utility industry: the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI). Both are described in more detail on the next page. Replacing and upgrading our infrastructure will help SCE maintain or improve SAIDI and SAIFI measurements. This report provides historical reliability data for the circuits that serve your jurisdiction and our proposed infrastructure upgrades for the current year. To view other reliability reports, visit sce.com>outage Center>Maintaining Reliable Service 3

4 Reliability Metrics MOMENTARY OUTAGES: OUTAGES LASTING 5 MINUTES OR LESS SUSTAINED OUTAGES: OUTAGES LASTING LONGER THAN 5 MINUTES MAIFI: o The number of times the average customer is interrupted by Momentary outages each year. SAIFI: o The number of times the average customer is interrupted by Sustained outages each year. SAIDI: o The cumulative amount of time the average customer is interrupted by Sustained outages each year. 4

5 Cities in the REDLANDS District CityList1 BANNING BEAUMONT BOX SPRINGS MOUNTAIN CALIMESA CHERRY VALLEY COLTON GRAND TERRACE HIGHGROVE HIGHLAND LOMA LINDA MENTONE MUSCOY REDLANDS RIALTO RIVERSIDE YUCAIPA CITY OF SAN BERNARDINO SAN MANUEL BAND OF MISSION INDIANS 5

6 * Exclusions are days which utilities are allowed to remove from their metrics because the outages on those days were caused by a severe acts of nature. **In the columns showing Rank, lower numbers indicate poorer performance. 6

7 Overview of Rialto CircuitList1 There are 41 circuits that serve Rialto 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers AUGUSTA(12KV) 1,098 SHERRY(12KV) 1, BOLOR(12KV) 454 SHIRAZ(12KV) 2, BOMBAY(12KV) 101 SID(12KV) BURGUNDY(12KV) 1,679 SLOVER(12KV) CABERNET(12KV) 2,214 STOCKCAR(12KV) 2, CACTUS(12KV) 4 SUSAN(12KV) 1, CASMALIA(12KV) 2,342 TAMARIND(12KV) 2, CHARLIE(12KV) 1,611 TRAPP(12KV) 2, DOMIC(12KV) 1,439 TURNTABLE(12KV) DORSEY(12KV) 1,599 WIND TUNNEL(12KV) ELDER(12KV) 1,789 ZINFANDEL(12KV) 1, FLEETWOOD(12KV) FRISBIE(12KV) 1, GILFILLAN(12KV) HEATHER(12KV) 1, HIGHBALL(12KV) 1, HOPPER(12KV) 1, HUFF(12KV) 2, IRONHORSE(12KV) LANCERS(12KV) 2, LIMONITE(33KV) LOPER(4.16KV) LOVE(4.16KV) LYTLE(12KV) 1, MATEUS(12KV) 1, REISLING(12KV) 1, ROI-TAN(12KV) 2, ROSEWOOD(4.16KV) SAUTERNE(12KV) 1, SCHOLL(12KV) 1, Grand Total 56,893 7

8 Reliability History of Circuits Serving Rialto (No Exclusions) BarChart SAIDI (average minutes of sustained interruptions) Rialto SAIFI (average frequency of sustained interruptions) SCE SYSTEMWIDE MAIFI (average frequency of momentary interruptions) ** Exclusions are days which utilities are allowed to remove from their metrics because the outages on those days were caused by acts of nature. **Data is as of 02/20/2018, data can be slightly different due to outage data validation process 8

9 Causes of Repair Outages in Rialto 2017 SAIDIChart Vegetation /Animal 0.1% Contributions to SAIDI by Outage Cause Weather /Fire /Earthquake 4.9% Equipment Failure e.g., in-service failure of transformer, switch, or conductors Vegetation/Animal e.g., tree branch, rodent, or bird causing a short circuit between conductors Other e.g., patrolled but no cause found Operations e.g., urgent maintenance w/o 3-day notice 3 rd Party e.g., balloon, car hit pole, dig-in Operation 15.8% Other 7.5% Equipment Failure 50.8% 3rd Party 20.8% 3rd Party Equipment Failure Operation Other Vegetation /Animal Weather /Fire /Earthquake SAIDI = the cumulative amount of time the average customer is interrupted by sustained outages each year. 9

10 Causes of Repair Outages in Rialto 2017 SAIFIChart Vegetation /Animal 0.1% Contributions to SAIFI by Outage Cause Equipment Failure e.g., in-service failure of transformer, switch, or conductors Vegetation/Animal e.g., tree branch, rodent, or bird causing a short circuit between conductors Other e.g., patrolled but no cause found Operations e.g., urgent maintenance w/o 3-day notice 3 rd Party e.g., balloon, car hit pole, dig-in Other 20.6% Weather /Fire /Earthquake 8.5% Operation 29.5% 3rd Party 17.2% Equipment Failure 24.0% 3rd Party Equipment Failure Operation Other Vegetation /Animal Weather /Fire /Earthquake SAIFI = the number of times the average customer is interrupted by sustained outages each year 10

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13 Back-up Slides Reliability Histories of Circuits Serving Rialto Updated through Dec 2017

14 Average Reliability of 41 Circuits Serving Rialto CitySummary st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI 41 Circuits Serving Rialto -- Total Customers: 56, rd Party 33% 33% 24% 32% 24% 21% 22% 23% 22% 16% 10% 16% 14% 14% 60% 19% 33% 29% 29% 14% 55% 21% 17% 42% Equipment Failure 33% 21% 12% 50% 53% 24% 19% 23% 36% 73% 49% 8% 41% 25% 7% 51% 24% 3% 40% 14% 4% 51% 24% 5% Operation 5% 10% - 5% 14% 0% 29% 26% 2% 9% 36% 5% 42% 58% 2% 19% 17% 7% 7% 22% - 16% 30% 3% Other 6% 16% 41% 2% 0% 40% 15% 15% 20% 1% 0% 17% 3% 4% 31% 0% 7% 37% 22% 42% 29% 8% 21% 29% Vegetation/Animal 1% 1% 5% 0% 0% 1% 3% 6% 8% % 0% 0% % 0% 0% 1% 0% 0% 8% Weather/Fire/Earthquake 22% 18% 19% 10% 7% 14% 11% 6% 11% 1% 5% 20% % 20% 22% 2% 7% 11% 5% 9% 13% SCE SYSTEMWIDE Notes: No outages are excluded from the metrics. Outage Causes: Other: e.g., patrolled but no cause could be found Operations: e.g., urgent maintenance w/o 3-day notice to customers 3 rd Party: e.g., balloons, car hit pole, dig-in Vegetation/Animal: e.g., tree branch, rodent, or bird causing short circuit across conductors SAIDI (minutes) = the cumulative amount of time the average customer is interrupted by sustained (longer than 5 minutes) outages. SAIFI (interruptions) = the number of times the average customer is interrupted by sustained outages. MAIFI (interruptions) = the number of times the average customer is interrupted by momentary " (lasting 5 minutes or less) outages. 14

15 Reliability Histories for Individual Circuits Serving Rialto - 1 of st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI AUGUSTA(12KV) - Customers: 1, CircuitHistory rd Party Equipment Failure Operation 100% 100% Other Weather/Fire/Earthquake BOLOR(12KV) - Customers: rd Party % Equipment Failure % 100% 100% Operation 100% 100% % 100% % 53% - Other % % 100% - 46% 47% - Weather/Fire/Earthquake BOMBAY(12KV) - Customers: rd Party 100% 99% 100% % Equipment Failure 0% 1% % 100% % 100% - Operation % 100% Other Vegetation/Animal % % Weather/Fire/Earthquake BURGUNDY(12KV) - Customers: 1, rd Party % 96% 98% 48% 2% 1% Equipment Failure 18% 0% % 3% 12% % 31% - 100% 100% - 68% 37% - 70% 40% - Operation % 0% 3% 46% 91% Other % % % 27% % 21% - 10% 21% - Vegetation/Animal % 3% 1% - 16% 4% 44% % 42% % 42% - 19% 39% - Weather/Fire/Earthquake 82% 100% % 1% % % 15

16 Reliability Histories for Individual Circuits Serving Rialto - 2 of 11 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI CABERNET(12KV) - Customers: 2, rd Party % % 81% 100% 29% 74% 67% Equipment Failure % 0% 23% 100% 100% % 26% - 62% 19% - 53% 20% - Operation 1% 1% % 99% % 18% 29% % 1% 9% Other 99% 99% Vegetation/Animal % Weather/Fire/Earthquake % 100% - 4% 0% 55% % 56% 71% % 4% 23% CACTUS(12KV) - Customers: rd Party Equipment Failure 96% 17% Operation 4% 83% Other % % % Weather/Fire/Earthquake % % 100% % 100% - CASMALIA(12KV) - Customers: 2, rd Party % 30% % % Equipment Failure 92% 54% - 16% 35% 100% % 100% 27% % 99% 21% Operation 7% 46% % 100% Other % % 100% 100% - 0% 1% 11% Vegetation/Animal % % Weather/Fire/Earthquake 1% 0% 42% 22% 35% CHARLIE(12KV) - Customers: 1, rd Party Equipment Failure 99% 99% - 99% 78% - 16% 1% 100% 100% 100% - 100% 100% - 100% 100% % 100% - Operation 1% 1% - 0% 5% - 84% 99% % % Other % % % % Weather/Fire/Earthquake % 18% 100%

17 Reliability Histories for Individual Circuits Serving Rialto - 3 of 11 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI DOMIC(12KV) - Customers: 1, rd Party % 0% 0% 8% % % % Equipment Failure 7% 12% - 83% 99% 38% 0% 0% - 17% 27% - 100% 100% % 21% - Operation 4% 34% - 0% 0% % 73% % 50% - 100% 100% - 27% 53% - Other % % 64% 39% % % Weather/Fire/Earthquake 89% 54% 31% 16% 1% 28% 41% 36% 52% % 50% 100% % 26% 22% DORSEY(12KV) - Customers: 1, rd Party 76% 97% 100% % % Equipment Failure 24% 3% - 93% 97% Operation % 3% - 12% 7% 53% 100% 100% - 100% 100% % 100% - Other Vegetation/Animal % 90% 47% Weather/Fire/Earthquake % 3% ELDER(12KV) - Customers: 1, rd Party 36% 38% 22% % % % Equipment Failure 60% 35% 27% 56% 55% % 100% - 100% 100% % 3% - 76% 26% - Operation % 28% - 12% 1% % 56% - 9% 33% - Other 4% 26% 51% % 88% 99% 100% % 100% 26% 45% 41% - 15% 40% 11% Vegetation/Animal 1% 1% Weather/Fire/Earthquake % 18% 66% FLEETWOOD(12KV) - Customers: rd Party 65% 3% 25% % 34% % 100% % 33% - Equipment Failure 1% 0% - 100% 100% - 6% 33% 100% 100% 100% 72% 37% 50% % 65% 57% Operation % 100% - 3% 1% - Other % % 33% % 63% 50% % % 1% 43% Vegetation/Animal % Weather/Fire/Earthquake 34% 97%

18 Reliability Histories for Individual Circuits Serving Rialto - 4 of 11 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI FRISBIE(12KV) - Customers: 1, rd Party % % 100% - 3% 2% - Equipment Failure 3% 0% - 92% 50% - 49% 36% - 74% 95% % 93% - Operation % 50% - 51% 64% - 26% 5% % 5% - Other % Vegetation/Animal 53% 58% 23% Weather/Fire/Earthquake 44% 42% 7% GILFILLAN(12KV) - Customers: rd Party % 100% % 100% % 100% - Equipment Failure 83% 56% - 100% 100% Operation 17% 44% Other Weather/Fire/Earthquake HEATHER(12KV) - Customers: 1, rd Party % 49% 100% 1% 5% % 20% 100% % 0% 100% Equipment Failure 23% 34% - 7% 1% - 84% 58% - 100% 100% - 52% 80% - 9% 1% % 1% - Operation 0% 0% - 35% 50% - 14% 36% % 0% % 0% - Other % Weather/Fire/Earthquake 77% 66% 19% % 99% % 99% - HIGHBALL(12KV) - Customers: 1, rd Party 95% 95% - 69% 89% - 93% 97% % 95% - 29% 45% - Equipment Failure 1% 1% - 29% 10% - 0% 0% - 100% 100% - 100% 100% - 100% 100% 100% 1% 0% - 70% 53% 35% Operation 2% 3% - 3% 1% % 0% - 5% 5% - 2% 2% - Other % % 7% 2% Vegetation/Animal 0% 0% % % Weather/Fire/Earthquake 2% 0% 51%

19 Reliability Histories for Individual Circuits Serving Rialto - 5 of 11 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI HOPPER(12KV) - Customers: 1, rd Party % 12% 100% Equipment Failure 93% 72% 33% 64% 42% - 1% 1% % 23% % 100% 41% 83% 64% 19% Operation 7% 28% - 32% 46% - 6% 6% - 91% 94% % 19% - Other % % 77% % 3% 16% 27% Vegetation/Animal % % % Weather/Fire/Earthquake % 94% 100% 9% 6% 50% % 1% 27% HUFF(12KV) - Customers: 2, rd Party 19% 12% 100% 81% 93% - 11% 4% 100% % 79% % 1% - Equipment Failure 39% 7% - 4% 1% - 18% 90% % 21% - 1% 0% - 2% 0% - Operation 42% 81% - 0% 0% - 0% 1% % 100% % 12% - Other % 100% - 79% 87% - Weather/Fire/Earthquake % 6% - 71% 6% IRONHORSE(12KV) - Customers: rd Party 89% 76% 100% % 77% - 23% 77% - Equipment Failure Operation % 100% Other 11% 24% % % Vegetation/Animal % % 23% 100% 77% 23% 50% Weather/Fire/Earthquake LANCERS(12KV) - Customers: 2, rd Party % 23% % 72% - 90% 95% 100% 33% 78% 100% Equipment Failure 2% 0% - 99% 93% 46% 8% 19% 75% % 13% - 0% 0% - 12% 9% - Operation 26% 12% % 40% % 15% - 10% 4% - 55% 13% - Other % % Vegetation/Animal % 7% - 2% 18% Weather/Fire/Earthquake 72% 88% 100%

20 Reliability Histories for Individual Circuits Serving Rialto - 6 of 11 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI LIMONITE(33KV) - Customers: rd Party 75% 50% 100% Equipment Failure % 100% % Operation Other % 100% 100% Weather/Fire/Earthquake 25% 50% LOPER(4.16KV) - Customers: rd Party 80% 50% % 95% 25% % 25% 17% Equipment Failure 7% 13% - 100% 100% - 8% 1% - 100% 100% % 4% - 29% 2% - 66% 26% - Operation 0% 0% % 1% - 22% 49% - 2% 25% - Other 13% 37% 100% % 92% 99% 100% % % 50% 49% 100% 4% 24% 66% Weather/Fire/Earthquake % % LOVE(4.16KV) - Customers: rd Party 69% 44% - 38% 34% 50% 65% 49% Equipment Failure 4% 11% - 62% 66% - 3% 1% - 100% 100% % 33% - Operation 10% 11% % 1% % 50% - 5% 33% - Other 11% 33% 51% % 32% 49% 100% % 70% 50% - 12% 33% 100% Weather/Fire/Earthquake 5% 0% 49% 0% 0% LYTLE(12KV) - Customers: 1, rd Party 56% 63% 2% % 25% 100% 39% 22% 100% Equipment Failure 36% 5% - 89% 98% - 61% 44% - 20% 50% - 100% 100% % 10% - Operation 8% 32% - 1% 1% - 39% 56% - 80% 50% % 0% - Other % % % % 75% - 52% 67% - Weather/Fire/Earthquake % 2% %

21 Reliability Histories for Individual Circuits Serving Rialto - 7 of 11 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI MATEUS(12KV) - Customers: 1, rd Party 100% 100% % % 21% 100% 1% 2% 67% Equipment Failure % 98% - 63% 79% % 2% - 98% 62% % 23% - Operation % 15% % 98% - 2% 38% - 2% 9% - 70% 70% - Other % 2% % % 81% 70% - 7% 6% 33% Weather/Fire/Earthquake % 5% REISLING(12KV) - Customers: 1, rd Party % % 1% % 100% 100% % 93% 100% Equipment Failure 100% 100% % 47% 46% % 2% - Operation % 100% - 51% 38% - 53% 54% % 100% - 14% 5% - Other Vegetation/Animal % 25% 9% Weather/Fire/Earthquake % 37% 9% ROI-TAN(12KV) - Customers: 2, rd Party 8% 1% - 90% 49% 66% 20% 26% 26% 67% 42% % 0% - 11% 7% - Equipment Failure 58% 54% 100% 9% 50% 34% 49% 48% 74% % 21% 100% 98% 64% - 82% 50% - 54% 33% 27% Operation 0% 1% - 0% 1% - 12% 4% - 17% 12% - 79% 79% - 2% 36% - 0% 1% - 22% 28% - Other % 22% - 6% 4% % 49% 100% 11% 26% 36% Vegetation/Animal % 1% Weather/Fire/Earthquake 33% 44% % 1% - 11% 42% 100% % 6% 36% ROSEWOOD(4.16KV) - Customers: rd Party 81% 50% Equipment Failure 5% 13% - 100% 100% - 25% 32% - 96% 94% % 25% - Operation % 18% - 4% 6% % 50% - 7% 26% - Other 14% 37% 100% % 73% 50% 100% % 100% % 70% 50% - 29% 49% 100% Weather/Fire/Earthquake

22 Reliability Histories for Individual Circuits Serving Rialto - 8 of 11 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAUTERNE(12KV) - Customers: 1, rd Party 97% 99% - 32% 66% - 20% 49% 22% 100% 100% 100% % 100% 50% Equipment Failure 2% 0% - 62% 30% - 21% 7% 59% Operation 1% 1% - 1% 2% - 58% 44% Other % % Vegetation/Animal % Weather/Fire/Earthquake % 2% SCHOLL(12KV) - Customers: 1, rd Party % 99% 54% % 0% 33% 8% 0% 33% Equipment Failure 100% 100% 37% % 1% - 100% 100% % 0% - 9% 0% - Operation % 100% - 0% 0% 46% Other % % Weather/Fire/Earthquake % 100% - 85% 99% 67% 84% 99% 67% SHERRY(12KV) - Customers: 1, rd Party % 29% 44% % 37% 100% % 25% 100% Equipment Failure % 49% - 29% 37% 44% % 63% - 100% 100% - 50% 64% - Operation % 51% - 47% 30% - 100% 100% - 100% 100% % 11% - Other % 3% Vegetation/Animal % Weather/Fire/Earthquake SHIRAZ(12KV) - Customers: 2, rd Party 11% 7% % 54% 74% % 52% 36% Equipment Failure % 99% % 100% 100% % 100% % 3% - Operation 89% 93% - 1% 1% - 100% 100% % 46% 26% % 45% 12% Other % % % Vegetation/Animal % Weather/Fire/Earthquake

23 Reliability Histories for Individual Circuits Serving Rialto - 9 of 11 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SID(12KV) - Customers: rd Party 89% 57% Equipment Failure 6% 15% - 100% 100% % 100% % 44% - 90% 56% - Operation % 28% - 3% 22% - Other 5% 28% 100% % 100% 100% 100% % 15% 28% - 7% 22% 100% Weather/Fire/Earthquake SLOVER(12KV) - Customers: rd Party % 25% % % Equipment Failure 2% 1% - 100% 100% - 54% 61% % 100% % 33% - Operation 0% 1% % 14% % 50% - 9% 33% - Other 97% 99% Vegetation/Animal % % Weather/Fire/Earthquake % 50% - 45% 33% - STOCKCAR(12KV) - Customers: 2, rd Party 100% 100% 100% % 73% 100% Equipment Failure % 10% - 4% 10% % 2% - 100% 100% % 2% - Operation % 88% - 17% 17% % 98% % 98% - Other % Vegetation/Animal % % Weather/Fire/Earthquake % 2% 50% SUSAN(12KV) - Customers: 1, rd Party 1% 0% 100% 100% 100% 10% 52% 57% 23% % 100% 100% % 79% 51% Equipment Failure % 0% - 5% 30% 77% % 5% % 1% - Operation 8% 44% % 13% - 100% 100% 100% % 47% 100% % 12% 49% Other 92% 56% % Weather/Fire/Earthquake % 48% % 8% - 23

24 Reliability Histories for Individual Circuits Serving Rialto - 10 of st Qtr nd Qtr rd Qtr 2017 CircuitHistory10 4th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI TAMARIND(12KV) - Customers: 2, rd Party % 33% 38% Equipment Failure 53% 28% - 100% 100% 75% 70% 66% 62% % 100% % 66% - Operation 47% 72% % 1% % 100% % 34% - Other % Weather/Fire/Earthquake % 1% TRAPP(12KV) - Customers: 2, rd Party % % Equipment Failure % 4% - 100% 100% % 100% - 8% 2% - 100% 100% - 68% 17% - Operation 100% 100% - 36% 96% % 100% % 87% % 83% - Other % Weather/Fire/Earthquake % 11% % 0% - TURNTABLE(12KV) - Customers: rd Party % 6% Equipment Failure 99% 99% 100% 21% 43% - 2% 35% 100% % 100% % 90% - Operation 1% 1% % 2% - 100% 100% % 10% - Other % 15% - 52% 24% Vegetation/Animal % % Weather/Fire/Earthquake % 43% 100% 20% 34% 0% WIND TUNNEL(12KV) - Customers: rd Party 21% 16% Equipment Failure 75% 38% 21% % 100% 100% 100% 100% 100% Operation 3% 46% Other % Weather/Fire/Earthquake

25 Reliability Histories for Individual Circuits Serving Rialto - 11 of st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory11 SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI ZINFANDEL(12KV) - Customers: 1, rd Party % 39% 30% - 4% 18% 33% % 98% % 97% 92% 25% Equipment Failure 48% 10% - 57% 21% 100% % 2% % 2% - Operation 52% 90% - 4% 49% - 23% 38% % 100% % 6% - Other % % % % % Vegetation/Animal % 44% Weather/Fire/Earthquake