structure of moving contactor in molded case circuit breaker

摘要

The present invention, in the opening and closing mechanism of the circuit breaker, is to improve the structure of the movable contact so that the power supply side and the load side to drive separately to achieve an accurate energization effect.;To this end, the present invention is coupled to the main shaft (2) and the main pin (3) in the center of the main shaft (2) is installed to rotate in conjunction with the link mechanism during the operation of the opening and closing handle (1) of the breaker And an opening and closing mechanism of a circuit breaker having a movable contact having a bi-contact structure which rotates during a trip, and a fixed contact to which the movable contact is connected and spaced apart. The movable contactor is divided into a power supply side movable contactor 4a and a load side movable contactor 4b so as to be separately rotatable about the main pin 3, and the divided power supply movable contactor 4a and the load side movable contactor ( Compression springs 6 which are elastic members for pressing both sides of the power supply side and the load side movable contacts 4a, 4b so as to ensure electrical connection between the power supply side and the load side movable contacts 4a, 4b on both sides of 4b). Is installed, and the power side movable contactor 4a and the load side movable contactor when the breaker is turned on between one side of the main shaft 2 and one side of the power side movable contactor 4a and the other side of the main shaft 2 and the other side of the load side movable contactor 4b. The movable contact of the circuit breaker, characterized in that an elastic member is provided to give a rotation moment such that 4b) contacts the power supply side and the load side fixed contacts 5a, 5b at a constant pressure. Joe is provided.