Reliability Report -- 1999 - Pennsylvania Public Utility Commission

Figure 38 UGI outage tracking (number of incidents)
300
250
Animal
Equipment Failure
Trees
200
150
100
50
0
Wellsboro Electric Company
In 2010, Wellsboro experienced 6,378 customer interruptions with a total duration of 482,833 customer
minutes, which was 33.4 percent lower than last year. Five major events occurred in Wellsboro’s
service territory during 2010. The calculation of the reliability indices excludes outage data related to
these events, which were approved by the Commission. 31
• May 1, 2010 – A vehicle accident resulted in a broken pole; 957 customers were affected (15.7
percent).
• May 8-9, 2010 – High wind; 1,199 customers were affected (19.7 percent).
• Sept. 2-3, 2010 – Substation tripped due to failed recloser; 3,026 customers were affected (49.4
percent).
• Sept. 10, 2010 – Failed relay caused substation outage; 3,026 customers were affected (49.4
percent).
• Oct. 15, 2010 – Dead off-right-of-way tree fell onto three-phase line; 1,420 customers were
affected (23.2 percent).
Wellsboro’s CAIDI declined from 96 minutes in 2009 to 76 minutes in 2010, which was a 20.8 percent
decrease in CAIDI minutes and 39.0 percent better than the benchmark of 124 minutes. Since June
2004, CAIDI has remained below the benchmark. The CAIDI three-year average was 35.4 percent
below the standard of 136 minutes. For the 12-month average ending March 31, 2011, CAIDI was 76
31 Docket Nos. M-2010-2175256, M-2010-2189079, M-2010-2201406, M-2010-2206195 and M-2010-2205333.
38
Pennsylvania Public Utility Commission