Swing arm transmission type double-fracture isolating switch

Abstract

The invention provides a swing arm transmission type double-break disconnecting switch which comprises a shell and an insulating supporting shaft, a moving contact is assembled on the insulating supporting shaft and comprises a first swing arm and a second swing arm, and a first isolating static contact, a second isolating static contact and a grounding static contact which are arranged in the same circumferential direction at intervals are installed in the shell. The rotating stroke of the moving contact is provided with a closing station in contact with the two isolation static contacts, an opening station not in contact with the contacts, and a grounding station in contact with the grounding static contact and the first isolation static contact. The double-break isolation switch also comprises an auxiliary grounding moving contact which passes through the housing. When new equipment is expanded or a withstand voltage test is carried out, the moving contact is in an opening station, and the auxiliary grounding moving contact is contacted and conducted with the moving contact; when new equipment is overhauled, the moving contact is in a grounding station. The transmission structure is simple and compact, and the space in the length direction can be saved; and meanwhile, the safety of operators during extension of new equipment or a voltage withstand test can be ensured, and the safety is higher.

Description

technical field [0001] The invention relates to the technical field of isolating switches, in particular to a swing arm transmission type double-break isolating switch. Background technique [0002] At present, large-scale GIS power stations are generally constructed in stages, and the equipment part of the first phase is only reserved for expansion interfaces. During the expansion, the busbar needs to be powered off. At the same time, when a certain interval fails during the operation of the GIS, the interval needs to be repaired separately. The power failure of the busbar means delaying the construction progress, wasting manpower and material resources, and causing direct or indirect economic losses. [0003] The main reason why GIS can't realize uninterrupted expansion, maintenance and test is: in the design of the expansion structure, there is only one isolation fracture between the standby bay and the running bus. Or cause damage to the running equipment, so the origin...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a swing arm drive type double-break isolating switch to solve the problem that the existing double-break isolating switch has a complex drive structure and the arrangement of contacts takes up a lot of space, resulting in an uncompact structure

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