Residents who are served by Central Virginia Electric Cooperative’s Shannon Hill, Ferncliff, Henson’s Store and Zion substations, were without power for a short while on the evening of Wednesday, April 10 while transmission repairs were made.
Throughout the day, CVEC crews attempted to track down the location of a transitory fault along a 25 mile long, 115 kilovolt transmission line that begins at Columbia, runs north to the Shannon Hill substation and then west to deliver power to the tree substations.
The transitory faults, according to CVEC officials, had been brief, causing blinks similar to when a tree brushes against a distribution line, resulting in a temporary lapse in service and causing members to have to reset their electronic clocks. Unfortunately these temporary faults occurred throughout the day, about every half hour.
After patrolling the line, CVEC crews hung fault indicators and used the equipment to predict the fault location to be 7.2 miles north of the Columbia metering point. Upon arriving at that location, crews found a cracked insulator which needed to be replaced.
Crews de-energized the lines to make the repairs at about 8 p.m. and were completed in 35 minutes, sooner than the initial estimated outage time of 60-90 minute.