Anti-short-circuit vacuum relay

Abstract

The invention discloses an anti-short circuit type vacuum relay. The vacuum relay comprises a movable contact piece, a static contact point and a movable contact piece driving mechanism, a movable magnetic conductive metal piece and a static magnetic conductive metal piece are arranged around the peripheries of the movable contact piece and the static contact point, and the movable magnetic conductive metal piece and the movable contact piece are arranged on the movable contact piece driving mechanism at the same time. The static magnetic conductive metal piece and the static contact point are relatively and statically arranged in a porcelain tube of the vacuum relay, and when the movable contact piece driving mechanism drives the movable contact piece to move and is in contact conduction with the static contact point, two ends of the movable magnetic conductive metal piece and two ends of the static magnetic conductive metal piece are close to form a loop surrounding a contact position connecting line of the movable contact piece and the static contact point. When the contacts of the anti-short-circuit vacuum relay are closed, the movable and static magnetic conductive metal pieces are close to each other to form a loop and generate electromagnetic attraction, so that the contact pressure between the movable and static contacts is increased to counteract electric repulsive force generated by instant large current, thereby ensuring stable performance and life cycle of the product, and the anti-short-circuit vacuum relay has the advantages of simple structure, stable performance, reliability and the like.

Description

Technical field[0001]The present invention relates to a vacuum relay, and more particularly to a short-term vacuum relay.Background technique[0002]At present, when the vacuum relay is in use, if the connected device suddenly fails, instantly generate large short-circuit current flows through the vacuum relay, such as more than a few thousand amps, this large current will generate electric stunning force to the vacuum relay contact portion, resulting in The movet static contact point is separated, generating an arc, and finally blows or instantly blows the cartridge, thereby damaging the product.Inventive content[0003]In order to overcome the above defects, the present invention provides a resistance to short-type vacuum relays, which can resist electric repulsive force generated by large currents to ensure stable and reliable product performance.[0004]The present invention has been used in order to solve the technical problems of the present invention: an anti-short-path vacuum rela...

AI Technical Summary

Problems solved by technology

[0002] When the current vacuum relay is in use, if the connected equipment suddenly breaks down, a large short-circuit current will flow through the vacuum relay instantly, for example, when it exceeds several thousand amperes, this large current will cause electrodynamic repulsion at the contact part of the vacuum relay, resulting in The dynamic and static contact points are separated, and an arc is generated, which eventually causes the dynamic and static contacts to stick or explode instantly, thus damaging the product

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