Patent ID: 8481875
Filing Date: 2013-07-09
Classification: H02B

Abstract:
1. A plug interlock device for a vacuum circuit breaker, the device comprising: a switchboard having a control power plug; a breaker body having a control power connector for detachably connecting the control power plug, and having terminals for receiving a voltage and a current; a cradle installed at the switchboard, and having terminals connected to or disconnected from the terminals of the breaker body; a carriage on which the breaker body is located, and slidably installed at the cradle; and a carriage restriction unit configured to selectively restrict motion of the carriage by interworking with an operation to insert the control power plug into or separate the control power plug from the control power connector, wherein the carriage restriction unit comprises: a link configured to move up and down along an insertion or separation direction of the control power plug; and a blocking plate coupled to the link in order to interwork with the link, and configured to restrict the motion of the carriage or release a restricted state of the carriage by moving in a direction perpendicular to a moving direction of the carriage, wherein the link is provided with a slit in a moving direction of the link, and the link is slidably coupled to the carriage according to a coupled state between the control power plug and the control power connector, and wherein sliding holes having a slit shape are formed at the blocking plate such that the blocking plate is slidably coupled to the carriage in a direction perpendicular to a moving direction of the carriage.