About 500 homes in Warrnambool lost power for a brief period on Friday night, Powercor says.
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A spokesman said the majority of those properties had their power return within 10 minutes, but others were without power for about 45 minutes.
He said a small number were still without power when he spoke to The Standard.
"We haven't figured out what the fault is at the moment," the spokesman said.
"We're doing patrol and figuring out what the issue was and how to fix, we have been able to back feed to get customers back on."
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