INTERLOCK DEVICE OF EARTH SWITCH

摘要

PURPOSE: An interlock device of a ground switch is provided to prevent an electric accident due to the overlapping operation of a circuit breaker and a ground switch. CONSTITUTION: A running shaft(390) operates a ground switch by rotation. An operating shaft(323) is connected to a lever(322) and has a square cross section. An operating unit(320) includes an opening and closing plate(380) which opens and closes an inlet(321a) of an operation handle. An interlock plate(350) is hinged with a support plate(311). A movable contact unit(340) rotates an interlock plate.