Recently-installed electrical equipment at the Alyeska seafood processing plant triggered a power outage Friday.
KUCB reached Dan Winters, director of public utilities, by email Monday morning to ask about the suspected cause of Friday's outage.
Winters said there was an unscheduled partial power outage at 3:45 p.m. It affected power customers on Unalaska Island and Captains Bay. All circuits were closed and full power back on by 4:10 p.m.
As was the case in an earlier power outage last Tuesday, Winters says a transformer recently installed at the Alyeska seafood plant is not functioning properly.
He said the outage was caused "when the transformer at Alyeska was being tested and the secondary side was energized, although the leads into the plant had been stood off," Winters said.
Personnel from the company that makes the Alyeska transformer are on their way to Unalaska to address the issues. Those workers are expected Tuesday.
The outage Friday afternoon interrupted broadcast of one of Unalaska's few radio stations. KSKA, Anchorage's public radio station, is broadcast in Unalaska at 91.1 FM. KUCB serves as a repeater station for KSKA's signal.
The station has been off the air since Friday afternoon due to damaged equipment. KUCB staff is working with engineers in Anchorage to repair the equipment and reconnect KSKA's signal.