PECO to conduct aerial inspection of transmission system

Philadelphia, PA, March 18, 2009 — As part of its annual spring maintenance programs, PECO is conducting aerial patrols of its electric transmission lines for the next five weeks.

PECO will use a helicopter equipped with infrared cameras to inspect transmission towers, nearly 1,000 miles of aerial high-voltage lines and other electric equipment in York, Chester, Delaware, Montgomery, Bucks and Philadelphia counties. PECO schedules these inspections early in the spring each year to identify needed maintenance on the transmission system prior to the higher electric loads in the summertime.

Haverfield Aviation, based in Gettysburg, Pa., along with utility line inspectors from Asplundh Infrared Services will conduct the inspections.

PECO will inspect the entire transmission system, looking at the tower structures, conductors, insulators, and other facilities. Additionally, one-third of the transmission system will be inspected at a slower, 3 mile-per-hour pace with the helicopters at times flying underneath the overhead lines and hovering just above the towers and conductors. The inspections can identify everything from tree clearances, loosened wire sleeves and broken strands of wire to bullet penetrations in wires and other equipment.

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