Arc control device

Abstract

The invention discloses an arc control device which comprises shells made of insulating material and a plurality of grate sheets, wherein, each of the grate sheets is provided with two side arms, a slot matched with the side arms of the grate sheets is arranged on the inner walls of the shells, the two shells are respectively sheathed on the two side arms of the grate sheets, the back of the shells is opened, the shells are also internally provided with plug jacks connected with the slot, and the front end parts of the side arms are inserted into the plug jacks. As the two side arms of the grate sheets are respectively sheathed with a shell, and the front end parts of the side arms are inserted into the plug jacks of the shell, so that the arc control device plays good role of protection,and avoids the grate sheets being burnt and damaged by voltaic arc. Meanwhile, the gaseous substance emitted by the insulating shell is beneficial to arc extinction.

Description

technical field [0001] The invention relates to an arc extinguishing device for extinguishing electric arcs in a switching device. Background technique [0002] In various switching appliances such as circuit breakers and contactors, arc extinguishing chambers are usually set up to extinguish the arc to ensure the safe operation of electrical equipment. During the switching operation, the voltage between the contacts causes the air dielectric to discharge, causing an arc to form in the interrupter. During the formation of an arc, the energy released by the Joule effect is so high that it is common practice in practice to place an element made of insulating material in the arc extinguishing chamber, which emits gaseous substances when the arc occurs. This substance affects the plasma produced by the arc, thus contributing to reducing the overall arcing phenomenon by reducing conductivity. [0003] Chinese invention patent ZL 00819243.X discloses an "interrupter chamber for ...

AI Technical Summary

Problems solved by technology

Although this structure has a small number of components, is easy to assemble, and has good mechanical stability, it also has an obvious defect: the metal grids installed in the shell cannot be effectively protected by the shell.

Since the front of the shell is open, the inner side of the metal grid (the side forming the U-shaped opening of the metal plate) is directly exposed to the arc, especially the end of the metal grid is easily burned by the arc. At the same time, the metal particles produced by burning are not conducive to arc extinguishing

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