Longitudinal magnetic field electrode vacuum switch tube with low loop resistance

Abstract

The invention provides a vacuum interrupter with an axial magnetic field electrode with low circuit resistance, which has the low circuit resistance similar as a plate electrode and the strong breaking capacity similar as an axial magnetic field electrode and excellently resolves the conflict between the current conducting capacity and the short-circuit current breaking capacity. A conductive circuit related portion of the vacuum interrupter comprises a movable conducting rod, a contact base, an elastic contact support, an auxiliary current conducting block, a contact and a static conducting rod. The elastic contact support and the auxiliary current conducting block are disposed in an electrode formed by a movable contact, a static contact, a movable contact base and a static contact base, and the movable contact and the static contact are axially arranged correspondingly. The auxiliary current conducting block is cylindrical or circular, and is located inside or outside the elastic contact support. The elastic contact support and the auxiliary current conducting block match in shape, thereby forming an envelope structure. The elastic support is an elastic body axially disposed, and the thickness of the elastic support ranges from 1mm to 5mm. By applying the invention, the circuit resistance of the existing axial magnetic field vacuum interrupter with larger circuit resistance can be obviously reduced.

Description

technical field

[0001] The invention relates to the technical field of vacuum switches. Specifically, it is a vacuum switch tube with longitudinal magnetic field electrodes supported by elastic contacts and auxiliary guide blocks. Background technique

[0002] Before the present invention was proposed, those skilled in the art knew very well that a vacuum switch tube is also called a vacuum interrupter, which uses a pair of electrodes sealed in a vacuum, such as a contact or a contact and a magnetic field generating structure. Driven by the moving mechanism, it is an electric vacuum device that completes the connection and breaking of the circuit. In order to have a larger breaking current for the vacuum switch tube used in circuit breakers, simple flat electrodes, such as cake-shaped metal material contacts, can no longer meet the requirements. For this reason, there are flat transverse magnetic field electrodes successively, for example, they are processed on the contacts...

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