Interlock apparatus of ground switch for vacuum circuit breaker

A ground switch interlock apparatus of a vacuum circuit breaker to be interlocked with ground switches of the vacuum circuit breaker for transferring the rotational torque of a ground operating shaft to drive three-phases ground switches to the ground position at the same time, the apparatus comprising:

• a drive spindle for drawing in or out a main body of the vacuum circuit breaker;
• a movable plate provided with a connection hole of a manipulation handle for rotating the drive spindle to be moved to a manipulation handle connection allowance position for allowing the manipulation handle to be connected to the drive spindle or a manipulation handle connection prohibition position for prohibiting the manipulation handle to be connected to the drive spindle;
• a first interlock plate connected to the movable plate to be movable to move the movable plate to the manipulation handle connection allowance position or the manipulation handle connection prohibition position;
• and
• a second interlock plate to be movable to a lock position for locking the first interlock plate at the manipulation handle connection prohibition position or a releasing position for releasing the first interlock plate.