A switch assembly and its static contact assembly

Abstract

The invention relates to a switch assembly and its static contact assembly to solve the problem in the prior art that the ablated part of the moving contact is located on the main circuit and affects the conductivity of the main circuit. The switch assembly includes a static contact assembly and a moving contact assembly. The moving contact assembly includes a moving contact that can be used in conjunction with the static contact assembly along the insertion direction. The static contact assembly includes a static contact seat, and the conductive arrangement on the static contact seat There are conductive main contacts and arcing contacts. The conductive main contacts and arcing contacts are arranged in parallel on the static contact seat. The moving contact includes a contact part for contacting with the conductive main contacts to conduct electricity to conduct the main circuit. It also includes an arc starting part that is arranged opposite to the contact part and conducts arcing with the arc starting contact before the main circuit is turned on. During the opening and closing process of the switch assembly, the contact part of the moving contact will never be ablated by the arc, and will not affect the conductivity of the main circuit. There is no need to additionally set a moving arc contact on the moving contact assembly to conduct the arc , making the overall structure simpler.

Description

technical field [0001] The invention relates to a switch assembly and its static contact assembly. Background technique [0002] At present, the grounding switches used in 12kV to 40.5kV air-insulated metal-enclosed switchgear have the ability to close the short-circuit current. In the system, most of the medium and low voltage grounding switches are E1 level (rated short-circuit current closing 2 times) grounding switches. [0003] Most of the medium-voltage earthing switch products, when making short-circuit current, often have phenomena such as adhesion between the moving contact and the static contact, and deformation of the moving contact. In order to improve the short-circuit current making ability of the earthing switch, there are some patents in This aspect has been studied. For example, a utility model patent with the authorized announcement number CN203733696U discloses a grounding switch arc extinguishing contact, the arc extinguishing contact includes a static ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a switch assembly to solve the problem in the prior art that the ablated part of the moving contact is located on the main circuit and has an impact on the conductivity of the main circuit; it also provides a static contact assembly for the switch assembly

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