Circuit breaker

Abstract

The invention relates to a circuit breaker. The circuit breaker comprises a base, wherein an operating mechanism, a transmission device and arc extinguishing chambers are arranged on the base; the operating mechanism is positioned behind the arc extinguishing chambers; the transmission device comprises a rotating main shaft driven by the operating mechanism, and three transmission connecting rods which are arranged corresponding to the three arc-extinguishing chambers in a left-right direction; the transmission connecting rods are in transmission connections with moving contacts of the arc extinguishing chambers respectively; the rotating main shaft is positioned on a front side of the operating mechanism; three output connecting levers which are arranged corresponding to the three arc extinguishing chambers in the left-right direction are coaxially assembled on the rotating main shaft; and the three output connecting levers are in transmission connections with the three transmission connecting rods in a one-to-one correspondence way, so that the rotating main shaft can drive the corresponding transmission connecting rods to rotate through the output connecting levers. The rotation main shaft, the output connecting levers and the transmission connecting rods move forwards, so that the overall height of the operating mechanism and the base can be reduced effectively; the vertical distance between the base and a lower outgoing line of a solid-sealed polar pole is effectively increased; and a high insulating capability is kept. The circuit breaker is suitable for being applied to places which have height requirements on the operating mechanism.

Description

technical field [0001] The invention relates to a circuit breaker. Background technique [0002] High-voltage circuit breakers are the most critical electrical equipment in power systems. As control and protection equipment, they are indispensable in power distribution devices in power plants and substations. For an indoor high-voltage vacuum circuit breaker, it generally includes an operating mechanism, a transmission device, and an arc extinguishing chamber. In the arc extinguishing chamber, there are static contacts and moving contacts correspondingly connected to the transmission device. The operating mechanism on the circuit breaker The spring operating mechanism is mainly used, the driving force is output by the power output shaft of the operating mechanism, and the insulating rod connected to the moving contact of the arc extinguishing chamber is controlled by the transmission device to move up and down, driving the moving contact and the static contact to open and cl...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a circuit breaker to solve the technical problems in the prior art that the corresponding main shaft is arranged under the operating mechanism, resulting in a high operating mechanism as a whole, and a small insulation distance between the base and the outgoing line under the solid-sealed pole.

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