Door interlock device for transformer room of vacuum circuit breaker

摘要

A door interlock device for a power transformer room in a vacuum circuit breaker includes a cam disposed on a shaft of a ground switch, a supporter disposed on a side plate of a power transformer room, a shaft disposed at the supporter to be slidable and having one end contacting the cam to be upward and downward movable, a spring disposed within the supporter to provide an upward elastic force to the shaft, and an interlock plate disposed at one side of the power transformer room door and configured to be in contact with the shaft, wherein the transformer room door is not allowed to move when the interlock plate is restricted by the shaft, but the power transformer room door is allowed to move when the interlock plate is released from the restriction of the shaft. The door interlock device for a power transformer room is capable of securing the safety of a user by providing the door to be opened only in a ground condition.