An arc extinguishing chamber and disconnector

Abstract

This utility model provides an arc-extinguishing chamber and a disconnecting switch. The arc-extinguishing chamber includes: an arc-extinguishing grid assembly with an extinguishing groove, comprising multiple rows of spaced arc-extinguishing grids; and a permanent magnet bracket installed in the extinguishing groove, on which a permanent magnet is mounted. The permanent magnet bracket has a stop at its end and an elastic hook extending inward from its end. During assembly, the stop abuts against the arc-extinguishing grids at the end of the arc-extinguishing grid assembly, and the elastic hook hooks and connects with the arc-extinguishing grids at the end of the arc-extinguishing grid assembly. During assembly, the permanent magnet bracket is inserted from one side of the extinguishing groove, axially limited by the stop, and then connected by a one-click snap-fit ​​using the elastic hook, eliminating the need for additional screws, rivets, or other fasteners, making assembly quicker and more convenient. Simultaneously, the stationary contact is positioned within the extinguishing groove close to the permanent magnet bracket, i.e., close to the permanent magnet, which enhances the attraction of the permanent magnet to the arc, reducing arc erosion of the moving and stationary contacts and extending the switch's service life.

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