Patent ID: 8264306

Claim:
A movable contactor assembly for a current-limiting-type molded case circuit breaker, the assembly comprising: a terminal base formed from an electric conductor, the terminal base fixedly installed on a case of the molded case circuit breaker and providing a supporting base; a plurality of movable contactors that are connected to the terminal base by a connection pin, are provided at each phase of an Alternating Current, having a cam face portion, and are movable to a position such that the plurality of movable contactors are separated from current-limiting-type fixed contactors of the molded case circuit breaker by an electromagnetic repulsive force when a fault current exists in a circuit to which the molded case circuit breaker is connected; a pair of holder plates that are connected to the terminal base by the connection pin, that support both sides of the plurality of movable contactors, and are rotatable; a plurality of first springs provided between the pair of holder plates and configured to: provide an elastic force to the plurality of movable contactors in a direction such that the plurality of movable contactors are brought into contact with the current-limiting-type fixed contactors when the molded case circuit breaker is in a closed circuit state, and provide an elastic force to the plurality of movable contactors in a direction such that the plurality of movable contactors are separated from the current-limiting-type fixed contactors when the molded case circuit breaker performs a current limiting operation; a plurality of extending plate portions extending from the terminal base and configured to face a side of one end portion of each of the plurality of movable contactors such that the plurality of extending plate portions is electrically connected to the plurality of movable contactors; a plurality of flexible wire plates having a first portion fixedly connected to the terminal base and a second portion extending between the plurality of movable contactors and the plurality of extending plate portions to electrically connect the plurality of movable contactors and the terminal base, the plurality of flexible wire plates bendable toward the plurality of movable contactors or toward the plurality of extending plate portions; and a second spring installed between the plurality of extending plate portions and the plurality of flexible wire plates to provide an elastic force to the plurality of flexible wire plates such that the plurality of flexible wire plates tightly contact the plurality of movable contactors.