A kind of arc extinguishing chamber and circuit breaker

Abstract

The invention relates to an arc extinguishing chamber and a circuit breaker, A circuit breaker comprises an operating mechanism and an arc extinguishing chamber, the arc extinguishing chamber includesa switch structure, the switch structure comprises a movable contact and a stationary contact arranged in front of and in cooperation with each other, Arc-extinguishing chamber also includes an exhaust passage for divert that arc gas generated by the dynamic and static contacts to be disconnected, and the movable contact is located on the front side of the exhaust passage, An outlet of that rearside of the exhaust passage is provided with an impeller for bee driven to rotate by air blowing, the rotational center axis of the impeller extends in the front-rear direction and the rotational center axis of the impeller extends in the front-rear direction, in the working process of the circuit breaker of the invention, the high temperature arc gas flows from front side to back side in the exhaust passage, so that that impeller is driven to rotate, so that the heat energy of the arc gas is converted into the kinetic energy of the impeller, and the arc gas is sufficiently disturbed when passing through the impeller, so that the temperature of the arc gas is lowered, and the structure which can play a cooling role on the arc gas does not cause the increase of the whole cost of the circuitbreaker due to the loss of the operation work in the working process.

Description

technical field [0001] The invention relates to an arc extinguishing chamber and a circuit breaker. Background technique [0002] The circuit breaker is a very important electrical component in the power distribution network. It is very important for the protection of the circuit. Its breaking capacity and operation reliability are the key to the safe operation of the entire power system. In the gas circuit breaker, the opening of the moving and static contacts will generate high temperature and free metal particles, and the high temperature generated will instantly heat the arc gas in the arc extinguishing chamber, and the arc gas has the characteristics of poor insulation ability at high temperature and high pressure, and it is easy to get out of the arc extinguishing chamber. The free metal particles are connected to form a circuit and form an arc breakdown. The circuit breaker needs to quickly cool the high-temperature arc gas generated during the current breaking proce...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an arc extinguishing chamber to solve the problem in the prior art that the cooling medium output by the compression device is used to cool the arc gas, which requires additional configuration of operating work to drive the compression device to work, which leads to an increase in the overall cost. problem, the corresponding invention also provides a circuit breaker

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