Interlock apparatus of ground switch for vacuum circuit breaker

摘要

Provided herein is an interlock apparatus for preventing the drawing-in or drawing-out of a vacuum circuit breaker main body in interlock with the ground operation of a ground switch (88) in a vacuum circuit breaker, and the ground switch interlock apparatus of the vacuum circuit breaker comprises: a drive spindle (20) for drawing in or out a main body of the vacuum circuit breaker; a movable plate (40) provided with a connection hole and movable to a manipulation handle connection allowance position for allowing the manipulation handle to connect with or a manipulation handle connection prohibition position for prohibiting the manipulation handle to connect to and to drive the drive spindle; a first interlock plate (50) connected to the movable plate to be moved to move the movable plate to the manipulation handle connection allowance position or the manipulation handle connection prohibition position; and a second interlock plate (60) to be moved to a position for locking the first interlock plate at the manipulation handle connection prohibition position when the ground switch is at a ground position and a position for releasing from the restraint of the first interlock plate when the ground switch is not at the ground position.