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: An operating mechanism having a second operating shaft assembly a second transmission structure. One end of a second energy storage spring structure drives an energy storage shaft while the other end of the second energy storage spring structure is arranged rotatably. The second transmission structure is in driving fit with the energy storage shaft to drive the energy storage shaft to rotate, so that the second energy storage spring structure stores energy. The second energy storage spring structure releases energy after turning past a second dead center position to drive the energy storage shaft to rotate. The energy storage shaft includes an energy storage shaft gear, a power output structure includes a power output gear shaft, and the energy storage shaft gear is engaged with the power output gear shaft to drive the power output gear shaft to rotate.

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: An air-blowing tripping mechanism that is driven by gas, and includes a housing having a sealing cavity with an air-blowing channel blocked by an insulating partition plate that is blown by the gas to move, whereby the gas enters the sealing cavity, and a push rod rotationally connected to the housing. The push rod includes a rotating arm rotationally connected aside of the sealing cavity, and a reset arm. One end of the rotating arm has an operating portion opposite to an operating mechanism of a circuit breaker, and the other end of the rotating arm has an air-blowing end that extends into the sealing cavity, is located on one side of the insulating partition plate and can drive the rotating arm to rotate under the action of the gas. The reset arm is on the rotating arm and used for driving the push rod to reset.

Abstract: A quick tripping device with a moving contact mechanism that includes a contact support and a moving contact. An operating mechanism is in driving connection with the moving contact mechanism, so that the moving contact and a static contact are switched on or off. A first push rod is pivotally disposed on the contact support with one end in driving fit with the moving contact, a driving gap is formed between the one end and the moving contact, and a first push rod driving end of the first push rod is in driving fit with the operating mechanism to trip the operating mechanism. When the moving contact is repelled, the moving contact rotates relative to the contact support through the driving gap, and then contacts with the first push rod driven end and drives the first push rod to rotate, so that the operating mechanism is tripped.

Abstract: An operating mechanism of a circuit breaker, relating to the field of low-voltage electric appliances. The operating mechanism is provided with a double-slider mechanism, a first slider mechanism comprising a first crank, a first connecting rod, a sliding rail and a slider, and a second slider mechanism comprising a contact support, a second connecting rod, a sliding rail and a slider. The double-slider mechanism reduces the space requirement of the operating mechanism while increasing the opening distance of a moving contact, and the breaking performance is good. A circuit breaker comprising the operating mechanism, which provides good breaking performance.

Abstract: An operating mechanism of a circuit breaker, wherein two ends of a first spring are rotationally connected to a rocker arm assembly and a first crank through a first spring shaft and a second spring shaft respectively, and one end of a jump buckle is rotationally connected to a bracket and is a jump buckle pivoting end; a jump buckle hole of the jump buckle is aligned with a bracket hole of the bracket; the first spring shaft is in limiting fit with the jump buckle; and one end of the first crank swings in a direction away from the jump buckle pivoting end, such that a spacing between the first spring shaft and the second spring shaft is smaller than or equal to the length of the first spring, and a first assembly state is formed.

Abstract: A short-circuit protection action current adjusting method and a device thereof for a multi-pole electromagnetic release.

Abstract: A short-circuit protection action current adjusting method and a device thereof for a multi-pole electromagnetic release.