Circuit breaker

A circuit breaker, comprising a plurality of circuit breaker poles arranged side by side, an operating mechanism and a tripping system, wherein each of the circuit breaker poles, comprises a pole housing and a contact system disposed in the pole housing, and the contact system comprises a moving contact mechanism which is disposed rotatably and a static contact which cooperates with the moving contact mechanism;

• the operating mechanism is disposed outside respective circuit breaker poles and is in driving connection to the moving contact mechanism of each circuit breaker pole;
• the tripping system comprises a plurality of groups of tripping mechanisms and an adjusting mechanism;
• each group of tripping mechanism comprises a conductive plate, as well as a magnetic yoke and an armature which are used cooperatively, wherein the conductive plate passes through the middle of the magnetic yoke;
• each circuit breaker pole is provided with a group of tripping mechanism therein, and the contact system of each circuit breaker pole is electrically connected to the corresponding conductive plate;
• the adjusting mechanism comprises a linkage rod which is disposed rotatably around its own axis;
• and
• each group of tripping mechanism further comprises an insulated transmission rod which is disposed rotatably, wherein one end of the insulated transmission rod is inserted into the pole housing and is in driving fit with the armature, and another end of the insulated transmission rod protrudes out of the pole housing and is in driving fit with the operating mechanism through the linkage rod to drive the operating mechanism to trip.