Arc-extinguishing load switch and switch equipment

Abstract

The invention discloses an arc-extinguishing load switch which comprises a substrate and a three-phase switch assembly, wherein each-phase switch assembly is provided with an air cylinder and comprises an upper static contact assembly, a lower static contact assembly, a moving contact and a grounding assembly, wherein the lower part of the moving contact can be in conductive contact with the lower static contact assembly and is pivoted with the air cylinder to rotate among a closing position, an opening position and a grounding position. A part of the air cylinder corresponding to a part between the closing position and the grounding position is a sealed part; the moving contact is fixedly provided with a rotating piston; the rotating piston is provided with a through blowing nozzle; the sealed part is matched with the rotating piston to divide the air cylinder into a closed compression cavity and a release cavity; and when the moving contact rotates from the closing position to the opening position, gas in the compression cavity is compressed by the rotating piston firstly, and then is blown to an upper static contact for arc extinguishing. The arc-extinguishing load switch has the advantages of high arc-extinguishing capacity.

Description

technical field [0001] The invention relates to an arc extinguishing load switch and switchgear. Background technique [0002] The arc extinguishing load switch generally includes an insulating shell and a three-phase switch assembly enclosed in the insulating shell. Each phase switch assembly includes an upper static contact assembly, a lower static contact assembly, a moving contact and a grounding assembly. The upper static contact assembly is attached to the upper part of the insulating shell, and the lower static contact assembly is attached to In the lower part of the insulating shell, the grounding assembly is attached to the side of the insulating shell, and the lower part of the moving contact can electrically contact the lower static contact assembly and pivotally connect the insulating shell so as to be able to switch between the closing position, the opening position and the grounding position. Turning, the opening position is located between the closing positio...

AI Technical Summary

Problems solved by technology

Since the three phases share the blade and one cavity, there are the following disadvantages: 1. The structure is complex and the cost is high; 2. The arc extinguishing ability is limited, which often leads to arc extinguishing failure.

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