BANGOR, Maine — The General Electric Energy manufacturing plant in Bangor closed its doors on July 30 for a routine summer shutdown that will last for about three weeks.

Chris Horn, a spokeswoman for GE Energy in Schenectady, N.Y., said the temporary closure is nothing new for the estimated 480 employees at the plant.

“Typically, we do have a summer shutdown,” Horn said Wednesday. “We ask our employees to apply vacation time during this period.”

The plant in Bangor produces components that are used in gas- and steam-powered turbines that eventually are used to generate electricity, Horn said. If all goes according to schedule, the plant will fully reopen on Aug. 23 after a truncated late shift the night of Aug. 22.