A high voltage vacuum circuit breaker

Abstract

The invention discloses a high-voltage vacuum circuit breaker. The high-voltage vacuum circuit breaker comprises an insulation cylinder and a transmission chamber, wherein a vacuum arc extinguishing chamber is arranged in the insulation cylinder, an upper end and a lower end of the vacuum arc extinguishing chamber are respectively fixed in the insulation cylinder by an upper support and a lower support, the high-voltage vacuum circuit breaker also comprises an insulation pull rod, a top end of the insulation pull rod is connected with a bottom end of a movable conductive rod by a first spring, a transmission mechanism is arranged in the transmission chamber and drives the insulation pull rod to do vertical motion in a reciprocating way, a clamping device is further arranged at a lower end of a static conductive rod and comprises two clamping strips, two support plates and two third springs, the two support plates are symmetrically arranged at two sides of the static conductive rod, the two clamping strips are respectively and movably fixed with the two support plates, and upper parts of the two clamping strips are connected with the static conductive rod respectively by one of the third springs. With the adoption of structure, a movable contact and a static contact are prevented from bouncing when the movable contact and the static contact are in contact, the service lifetime of a corrugated pipe is prolonged, and the vacuum degree of the arc extinguishing chamber is enabled not to be affected.

Description

technical field [0001] The invention relates to the field of high-voltage switches, in particular to a high-voltage vacuum circuit breaker. Background technique [0002] High-voltage vacuum circuit breaker, named because the arc-extinguishing medium and the insulating medium in the arc-extinguishing contact gap are both vacuum, it has the advantages of small size, light weight, suitable for frequent operation, and no maintenance for arc extinguishing. The application is more popular in China. The vacuum circuit breaker is an indoor power distribution device in a 3-10kV, 50Hz three-phase AC system. It can be used for the protection and control of electrical equipment in industrial and mining enterprises, power plants, and substations, especially for the requirements In places where there is no oil, less maintenance and frequent operations, circuit breakers can be installed in central cabinets, double-layer cabinets, and fixed cabinets to control and protect high-voltage elect...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-voltage vacuum circuit breaker, which solves the problem that the current high-voltage vacuum circuit breaker is prone to mechanical failure, which causes the opening and closing of the circuit breaker to be affected. Increased resistance, increased temperature, increased load on the vacuum interrupter, resulting in shortened service life of the circuit breaker

[0008] The invention can also solve the problem that the temperature of the vacuum interrupter is relatively high, which leads to the influence of the fatigue strength of the bellows, which further leads to the shortened service life of the bellows and the influence of the vacuum degree of the interrupter.

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