HVF vacuum circuit breaker

Abstract

The invention discloses an HVF vacuum circuit breaker which comprises a base. Walking wheels are fixedly installed at the two ends of the lower surface of the base respectively. A conductive part machine shell is fixedly installed at one end of the upper surface of the base. A power part machine shell is fixedly installed at the portion, on one side of the conductive part machine shell, of the base. A conductive mechanism with both the two ends penetrating through and extending to the side wall of the conductive part machine shell is fixedly installed in the conductive part machine shell. A breaking spring is fixedly connected with the bottom end of the conductive mechanism. The HVF vacuum circuit breaker almost does not need to be maintained, only parts normally abraded and aged need to be maintained, a vacuum arc extinguish chamber and a support of the vacuum arc extinguish chamber do not need to be maintained, the full-load short-circuit current probably caused by failures directly happening behind a transformer, a power generator or a current-limiting choking coil is avoided, the boosting rate of transient recovery voltages can reach up to 10 kilovolts per microsecond when failures happen behind the choking coil, and the dangerous state can be quite conveniently eliminated by means of the vacuum circuit breaker.

Description

technical field [0001] The invention relates to the technical field of vacuum circuit breakers, in particular to an HVF vacuum circuit breaker. Background technique [0002] The vacuum circuit breaker is named for its arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum. However, the current vacuum circuit breaker has many moving parts, which leads to its heavy weight and excessive noise and vibration during operation, and its operating mechanism is relatively cumbersome to maintain, and its expected service life is short. Oxidation will affect the normal use, and the existing vacuum circuit breaker cannot break the current under the condition of the transient recovery voltage of the ultra-high-speed boost, and the safety is poor. Contents of the invention [0003] The purpose of the present invention is to provide a HVF vacuum circuit breaker to solve the problems of overweight, excessive noise and vibration d...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a HVF vacuum circuit breaker to solve the problems of overweight, excessive noise and vibration during operation, cumbersome maintenance of the operating mechanism, easy oxidation of the contacts, and inability to operate in the above background technology. The problem of breaking current under the condition of transient recovery voltage of high-speed boost

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