High-voltage vacuum circuit breaker

Abstract

The invention discloses a high-voltage vacuum circuit breaker, and relates to the technical field of circuit breakers. The high-voltage vacuum circuit breaker comprises a machine case, a mechanism module, a welding operation shaft, a primary major loop, contact arms, contacts and a chassis, wherein the mechanism module and the welding operation shaft are arranged in the machine case; the primary major loop is transversely arranged at the rear side of the machine case; the welding operation shaft is located at the bottom of the machine case; the front end of the welding operation shaft is connected with the mechanism module through a link arm; the rear end of the welding operation shaft is connected with the primary major loop through an insulation pull rod; the contact arms are arranged at an upper leading-out terminal and a lower leading-out terminal of the primary major loop; the contacts are arranged on the contact arms; and the chassis is arranged at the bottom end of the machine case. Adopted spare parts are simple and reliable, so that the high-voltage vacuum circuit breaker is convenient to maintain, stable to drive, good in mechanical characteristics, high in reliability and long in service lifetime.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a high-voltage vacuum circuit breaker. Background technique [0002] Most of the existing high-voltage vacuum circuit breakers use a spring operating mechanism, which can be divided into two installation methods: one is to install each component in a welded frame, and the large operating shaft is assembled and connected with each transmission part by a spline shaft. However, this method is extremely inconvenient for distribution and maintenance, and the spline shaft is worn during movement, which makes the mechanical characteristics of the circuit breaker unstable and seriously affects the service life of the circuit breaker; the other adopts modular installation, that is, all parts of the mechanism It is made into an independent whole and installed in a welded frame as a module. The traditional modular installation method also uses spline shaft transmission, and the mec...

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Problems solved by technology

[0002] Most of the existing high-voltage vacuum circuit breakers use a spring operating mechanism, which can be divided into two installation methods: one is to install each component in a welded frame, and the large operating shaft is assembled and connected with each transmission part by a spline shaft. However, this method is extremely inconvenient for distribution and maintenance, and the spline shaft is worn during movement, which makes the mechanical characteristics of the circuit breaker unstable and seriously affects the service life of the circuit breaker; the other adopts modular installation, that is, all parts of the mechanism It is made into an independent whole and installed in a welded frame as a module. The traditional modular installation method also uses spline shaft transmission, and the mechanism module is complicated and difficult to install. There are also defects such as unstable mechanical properties and low life. , in order to solve the above problems, it is necessary to design a high-voltage vacuum circuit breaker

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