PECO electric reliability improves in 2009

Philadelphia, January 20, 2010 — PECO said its electric reliability in 2009 was its best in 15 years and among its best years ever for reliability performance.

The total number of service interruptions experienced by PECO customers during the year dropped by 6.5 percent compared with 2008.

In addition, PECO’s reliability performance as measured by average interruption frequency for customers, known as SAIFI in the utility industry, improved from 1.03 in 2008 to 0.96 in 2009, meaning that PECO customers generally experienced only one outage during the year, on average.

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The 0.96 also was better than the five-year average (2004-2008) of 1.06 for average customer frequency of electric interruptions.

The average duration of electric interruptions in 2009 was 108 minutes, less than the 126 minutes the previous year for a 14 percent improvement, and less than the five-year average of 114 minutes.

PECO also tracks customers who experience a higher than average number of power outages and outages of longer duration, and both measures improved by 8.4 percent and 20.7 percent respectively.

The company pointed to its increasing investments in distribution automation, its comprehensive vegetation management program to clear trees from aerial power lines, targeted reliability programs, and extensive corrective maintenance as factors that contributed to the fewer customer interruptions.

Founded in 1881 and based in Philadelphia, PECO is an electric and natural gas utility subsidiary of Exelon Corp. PECO serves 1.6 million electric in southeastern Pennsylvania and employs about 2,400 people in the region. PECO delivered 38.1 billion kWh of electricity in 2009.



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