Arc-suppressing load switch

Abstract

The invention discloses an arc-extinguishing load switch which comprises a base, a lower terminal post assembly, an upper terminal post assembly and an arc-extinguishing assembly, wherein the lower terminal post assembly comprises a lower conductive seat, a moving contact and a lower terminal post, an annular groove is arranged on the circumferential surface of an inner hole of the lower conductive seat, a spring toucher is arranged in the annular groove and tightly sleeves the moving contact under the elastic force action so as to ensure the conductive connection between the conductive seat and the moving contact; the lower terminal post is formed through the solidification of epoxide resin which is casted outside the lower terminal seat; and the upper terminal post assembly comprises an upper conductive seat, a fixed contact and an upper terminal post, wherein the fixed contact is provided with a plurality of claws with inward elastic force, and the claws grasp the moving contact under the elastic force action so as to ensure the conductive connection between the moving contact and the fixed contact; and the upper terminal post is formed through the solidification of epoxide resin which is casted outside the upper conductive seat.

Description

technical field [0001] The invention relates to a load switch which uses arc extinguishing gas to extinguish the arc. Background technique [0002] The medium voltage switches in the electrical industry mainly include SF6 load switches and vacuum circuit breakers. The difference between them is that the switch contacts of the vacuum circuit breaker are enclosed in a vacuum cavity, while the contacts of the load switch are placed in SF6 in the gas. The load switch described in this patent includes a base, a lower pole assembly, an upper pole assembly and an arc extinguishing assembly, the lower pole assembly and the upper pole assembly are both assembled on the base. The lower pole assembly includes a lower conductive seat, a movable contact and a lower pole, the movable contact is slidably arranged in the lower conductive seat; the lower pole is sleeved outside the lower conductive seat, and the movable The contact protrudes out of the lower pole so as to be conductively c...

AI Technical Summary

Problems solved by technology

However, the traditional load switch adopts the method of switch knife and arc extinguishing to extinguish the arc, and the arc extinguishing ability is limited, which often leads to arc extinguishing failure.

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