The invention discloses a
contact system of a
circuit breaker. The
contact system comprises a first current-carrying
copper bar, a second current-carrying
copper bar, a static main contact, a moving main contact, a static arc contact, a moving arc contact
assembly, a moving contact rod, a spring mechanism and a flexible connection mechanism, wherein the first current-carrying
copper bar and the second current-carrying copper bar are fixedly installed on the frame of a
circuit breaker, the static main contact and the static arc contact are fixedly installed on the first current-carrying copper bar, the static arc contact is located above the static main contact, one end of the spring mechanism is rotatably connected with the frame of the
circuit breaker, the other end is rotatably connected with the moving contact rod; the moving main contact is fixedly installed on the side face of the top end of the moving contact rod, the moving arc contact
assembly is installed at the top end of the moving contact rod, the moving arc contact
assembly is electrically connected with the second current-carrying copper bar through the flexible connection mechanism, the moving arc contact assembly comprises a moving arc contact, the moving arc contact can move within a certain range, and is located above the moving main contact, and the moving main contact and the moving arc contact can move along with the rotation of the moving contact rod.