Asynchronous switching device with arc absorption function and arc absorption method

Abstract

The invention discloses an asynchronous switch device and an arc absorption method. The asynchronous switch device comprises a main switch branch, an arc absorption branch and a moving contact set. The main switch branch comprises a main switch connection. The arc absorption branch comprises an arc absorption connection and a transient current absorption device. The moving contact set comprises a main contact and an auxiliary contact. The main switch connection and the main contact are connected or disconnected to allow the main switch branch to operate in an on or off state. The arc absorption connection and the auxiliary contact are connected or disconnected to allow the arc absorption branch to operate in on or off state. The arc absorption method includes the steps of when the asynchronous switch device is shut off, allowing the main switch connection and the main contact to separate before the arc absorption connection and the auxiliary contact separate. The switch device and the method have the advantages that arc sparks occur during the application of a switch circuit can be suppressed effectively, the safety is high, the stability is good, and the production cost is low. The asynchronous switch device and the arc absorption method are widely applicable to various circuit switch systems.

Description

technical field [0001] The invention relates to an arc extinguishing or anti-arc device between current-carrying parts, more specifically, to a switchgear with arc absorbing function and an arc absorbing method. Background technique [0002] Arc is a gas discharge phenomenon, the instantaneous spark generated by the current passing through some insulating medium (such as air). When a switching device is used to disconnect the current, if the circuit voltage and current are too high, an arc will be generated between the contacts of the device. The high heat generated by the arc melts the surface of the contact to form "burrs", which is easy to damage the contact and shorten the life of the switch. When the arc is severe, it will burn the contacts or even cause the entire circuit system to lose control, resulting in greater accidental losses. [0003] In the prior art, an arc chute is usually used to suppress the arc. The arc chute is installed near the path of the arc gene...

AI Technical Summary

Problems solved by technology

First of all, the arc chute is affected by the high temperature of the arc, so there are certain requirements for the material of the arc chute, the production cost is high, and the arc chute is easy to burn out; Too close to the electrode contacts or conductors, so that the discharge arc may not be absorbed by the arc chute, making the arc chute easy to fail; again, because the function of the arc chute is not to eliminate the arc, but to guide the arc into the arc chute as much as possible , to reduce the time that the arc is maintained at the contact point, the arc extinguishing effect is often not ideal

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