Vacuum arc-extinguishing chamber with operating mechanism

Abstract

The invention discloses a vacuum arc-extinguishing chamber with an operating mechanism. The vacuum arc-extinguishing chamber comprises a dynamic contact (3), a static contact (11), a static conductive rod (1), a dynamic conductive rod (4), a main shield (2), a corrugated pipe shield (13), an electromagnetic opening mechanism and a spring closing system, wherein the electromagnetic opening mechanism comprises an armature (5), a static iron core (14), an opening coil (6) and an insulating cylinder (15); the electromagnetic operating mechanism is arranged on an insulating support (7), the armature (5) is fixed with the dynamic conductive rod (4); the static iron core (14) is fixed on the insulating support (7) and connected with a lower flange (9) into a whole via an insulating supporting cylinder (17). The vacuum arc-extinguishing chamber eliminates the problem of dynamic seal and saves a corrugated pipe, so that the size of a vacuum circuit breaker is reduced; the probability of faults is reduced by adopting a simple dynamic connection mode; and each phase has an independent operating mechanism, so that the load of the mechanism is relieved and the contacts can be quickly opened and closed.

Description

technical field [0001] The invention relates to a vacuum interrupter, in particular to a vacuum interrupter with an operating mechanism, which belongs to the technical field of high-voltage electrical appliances. Background technique [0002] With the development of power grid technology, vacuum circuit breakers are more and more widely used in power systems as switches for controlling and distributing electrical energy, and maintain a dominant position in the medium-voltage field. [0003] The main function of the vacuum circuit breaker is to open and close the circuit through the opening and closing of the contacts, and the opening and closing are realized through the operating mechanism. Therefore, the performance and quality of the operating mechanism have a great impact on the work of the vacuum circuit breaker. Performance and reliability play an extremely important role. [0004] According to the fault statistics of power operation and substations in my country, the ...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems existing in the prior art. In view of the shortcomings of the existing vacuum circuit breaker operating mechanism complex structure, many mechanical connection parts, high mechanical failure rate, and poor sealing of the arc extinguishing chamber, it is necessary to provide A new type of vacuum interrupter structure with small volume, simple mechanical transmission, small time dispersion and high initial breaking speed

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