ISLESBORO, Maine — A power outage early Thursday afternoon caused by a defective insulator at the Lincolnville Central Maine Power substation left nearly all residents of Islesboro and the majority of people in Lincolnville without power for hours.

A Central Maine Power employee said a little after 4 p.m. that the company estimated the power would be turned back on around 5 p.m. It had gone out at 1 p.m.

At 4 p.m., the company counted 2,440 customers without power out of a total of 23,990 customers in Waldo County. All but five of the 919 customers on Islesboro were without electricity and 1,031 of the 1,705 Lincolnville customers were in the dark.

Murton Durkee, the Islesboro fire chief, said that the island was very quiet on Thursday afternoon.

“Everybody’s kind of used to these moments,” he said. “There are no calls. People are laying low and waiting for something to change. A lot of people out here have their own generator and make their own provisions. We just sit tight and wait, and enjoy the quietness.”