MOVABLE CONTACTOR DEVICE OF REPULSION TYPE CIRCUIT BREAKER

摘要

A movable contactor device of a repulsion type circuit breaker is provided to lengthen a releasable distance in automatically cutting off a large current when the large current occurs. A movable contactor device of a repulsion type circuit breaker includes a movable contactor(30) and a fixing contactor(40). Each of the movable contactor and the fixing contactor has a switching mechanism unit(20). A contact portion(35) of the movable contactor opens a contact along a guide cam(39) of a contact arm(36) by electromagnetic repulsive force. A stopper(38) of a movable contact pin is fixed to a center portion of the contact portion switching with the fixing contact. The contact arm is coupled with an activation spring(31) via a center axis(37) of a holder(34). The contact arm prevents the stopper of the contact portion from being re-inputted by a two-stage contact opening structure of the guide cam by a cam movement.