WITHDRAWABLE INTERLOCK DEVICE OF VACUUM CIRCUIT BREAKER

摘要

The present invention relates to a withdrawable interlock device of a vacuum circuit breaker which comprises: a power distribution board equipped with a control power plug; a breaker body equipped with a control power connector to and from which the control power plug is attached and detached; a cradle inserted in the power distribution board; and a trolley moving in the cradle in a state in which the breaker body is seated. The withdrawable interlock device also comprises: a link which moves in accordance with an attachment or a detachment of the control power plug and the control power connector; a link connector which moves in connection with the movement of the link by being connected to the link; a first lever which rotates at a certain angle in accordance with the movement of the link connector by being connected to the link connector; a moving plate which moves by being disposed in the trolley; and a second lever which is located between the link and the moving plate, limits the rotation of the first lever when a side thereof is located in the vicinity of the first lever in accordance with the rotation at a certain angle or pushes the moving plate at the same time by the other side thereof when a neighboring position with the first lever is released. The present invention has an effect of preventing the breaker body from being withdrawn to the outside in the application state of control power with a coupling of the control power connector and the control power plug by maintaining the sate of a fitting protrusion fitted into a fitting groove through a limitation of the movement of the moving plate through the second lever since the second lever is hooked outside the first lever when the control power connector and the control power plug are coupled, by locating the second lever between the link and the moving plate.