Abstract: A quick tripping device of a circuit breaker having a contact system that includes a moving contact mechanism and a static contact, wherein the moving contact mechanism includes a contact support and a moving contact, and a contact spring having, two ends connected with the moving contact and the contact support respectively. The quick tripping device further includes a first transmission structure in driving fit with the contact spring and rotatable rotates along with the contact spring. When a short-circuiting current flows through the contact system, the moving contact is repelled by an electric repulsive force between the moving contact and the static contact, so that the moving contact rotates relative to the contact support. The moving contact drives the first transmission structure to rotate through the contact spring, and the first transmission structure drives an operating mechanism to trip.

Abstract: A circuit breaker that includes circuit breaker poles, an operating mechanism and a tripping system. Each circuit breaker pole includes a pole housing and a contact system that includes a moving contact mechanism and a static contact. The operating mechanism drives the moving contact mechanisms. The tripping system includes groups of tripping mechanisms and an adjusting mechanism. Each group of tripping mechanisms includes a conductive plate, a magnetic yoke and an armature. The conductive plate passes through the magnetic yoke. Each circuit breaker pole has a group of tripping mechanisms. Each contact system is electrically connected to a corresponding conductive plate Each adjusting mechanism includes a linkage rod. Each group of the tripping mechanisms includes an insulated transmission rod having one end inserted into the pole housing and connected to the armature, and another end that protrudes out of the pole housing and trips the operating mechanism.

Abstract: An operating mechanism with a second connecting rod assembly that includes a second crank pivotally disposed around a tenth axis, a third connecting rod, and a third crank pivotally disposed around an eleventh axis. The second crank is rotatably connected to the third connecting rod through an eighth shaft, the third connecting rod is rotatably connected to the third crank through a ninth shaft, a first connecting rod assembly is rotatably connected to the second crank through a seventh shaft, and all the shafts and the axes are spaced in parallel. The tenth axis or the eleventh axis coincides with a rotation axis of a moving contact mechanism, and the eighth shaft or the ninth shaft rotates the moving contact mechanism. The operating mechanism provides a plurality of modes of connection with the moving contact mechanism, thereby facilitating the design of a contact system of the circuit breaker.

Abstract: A handle of a manual operation mechanism of a circuit breaker, which includes an operating handle, a padlock device, and a locking shaft, wherein a middle of the padlock device is pivotally arranged on the operating handle, a front end of the padlock device is connected with the locking shaft, the padlock device is connected with the operating handle through a first driving member, a rear end of the padlock device is in limit fit with a locking mechanism, a padlock hole is arranged in the rear end of the padlock device, and the padlock hole is shielded by the operating handle.

Abstract: A handle of a manual operation mechanism of a circuit breaker, which includes an operating handle, a padlock device, and a locking shaft, wherein a middle of the padlock device is pivotally arranged on the operating handle, a front end of the padlock device is connected with the locking shaft, the padlock device is connected with the operating handle through a first driving member, a rear end of the padlock device is in limit fit with a locking mechanism, a padlock hole is arranged in the rear end of the padlock device, and the padlock hole is shielded by the operating handle.

Abstract: A direct-acting electromagnetic trip device including a housing, and a regulation mechanism, a linkage mechanism, an electromagnetic system and a trip mechanism which are arranged in the housing. The regulation mechanism is connected with the linkage mechanism, the linkage mechanism is connected with one end of an iron core of the electromagnetic system, and the linkage mechanism is connected with the trip mechanism at the same time. The regulation mechanism includes a rotary knob and a regulation rod, wherein the rotary knob is abutted against and engaged with the regulation rod, and the regulation rod is abutted against and engaged with the linkage mechanism. The electromagnetic system further includes an elastic element that pushes the iron core to allow the linkage mechanism to be abutted against the regulation rod and allow the rotary knob to be abutted against the regulation rod.

Abstract: A direct-acting electromagnetic trip device including a housing, and a regulation mechanism, a linkage mechanism, an electromagnetic system and a trip mechanism which are arranged in the housing. The regulation mechanism is connected with the linkage mechanism, the linkage mechanism is connected with one end of an iron core of the electromagnetic system, and the linkage mechanism is connected with the trip mechanism at the same time. The regulation mechanism includes a rotary knob and a regulation rod, wherein the rotary knob is abutted against and engaged with the regulation rod, and the regulation rod is abutted against and engaged with the linkage mechanism. The electromagnetic system further includes an elastic element that pushes the iron core to allow the linkage mechanism to be abutted against the regulation rod and allow the rotary knob to be abutted against the regulation rod.