Patent ID: 8198557

Claim:
An apparatus for preventing withdrawing and inserting of a carriage of a circuit breaker, the apparatus comprising: a first guiding member having both ends coupled with a girder part, a fixed body, and a carriage main body part, a moving body to which a circuit breaker main body is coupled, respectively, and allowing the distance between the girder part and the carriage main body part to be varied according to its rotational direction; a second guiding member provided at the girder part and selectively limiting the rotational movement of the first guiding member according to whether or not an external force additionally applied from the exterior; and a constraining unit configured to constrain a movement of the second guiding member although an external force is additionally applied to the second guiding member while a closing operation is performed at the circuit breaker main body, to thereby prevent the circuit breaker main body from being withdrawn from a cradle accommodating the circuit breaker main body.