Operating mechanism of vacuum circuit breaker

Abstract

The invention discloses an operating mechanism of a vacuum circuit breaker. The operating mechanism comprises an arc extinguishing chamber, one side of the arc extinguishing chamber is provided with astatic contact, a moving contact is arranged on the other side of the arc extinguishing chamber, an arc extinguishing partition plate is arranged at the position, close to the joint of the moving contact and the static contact, of the arc extinguishing chamber, an annular groove used for installing the arc extinguishing partition plate is formed in the arc extinguishing chamber around the perimeter of the arc extinguishing partition plate, and the arc extinguishing partition plate penetrates through the arc extinguishing chamber along the annular groove to be connected with a push plate assembly; the moving contact comprises a contraction part which is arranged at one end close to the static contact, and a wrapping part used for wrapping the contraction part; and the push plate assembly pushes the arc extinguishing partition plate to move towards the joint of the static contact, and the arc extinguishing partition plate pushes the contraction part to contract and move towards the interior of the wrapping part. The push plate assembly drives the arc extinguishing partition plate to move towards the joint of the moving contact and the static contact, thereby separating the moving contact from the static contact through the acting force of the arc extinguishing assembly, and achieving the switching-off effect of the moving contact and the static contact.

Description

technical field [0001] The invention relates to the technical field of vacuum circuit breakers, in particular to an operating mechanism of a vacuum circuit breaker. Background technique [0002] With the domestic vacuum interrupter and vacuum circuit breaker technology becoming more and more mature, the output of vacuum circuit breakers in my country has increased significantly every year. Compared with SF6 circuit breakers, the biggest advantage of vacuum circuit breakers is that there is no risk of gas leakage and will not cause environmental pollution. . At the same time, it has many advantages such as good arc extinguishing performance, long electrical life, and high operational reliability. Therefore, vacuum circuit breakers have been widely used by many manufacturers and users in various industries due to their excellent performance. [0003] The vacuum circuit breaker mainly consists of three parts: vacuum interrupter, electromagnetic or spring operating mechanism, b...

AI Technical Summary

Problems solved by technology

[0005] However, due to the small opening distance of the contacts in the prior art, the operating work of the operating mechanism is small, and the stroke of the mechanical part is small. For this reason, the operating mechanism is prone to misoperation problems, and due to the arc effect generated between the moving and static contacts, it is easy to occur. The problem of suction of moving and static contacts, low safety performance

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