A circuit breaker with arc extinguishing function

Abstract

The invention relates to a circuit breaker with an arc extinguishing effect. The circuit breaker comprises a shell, a moving contact, a fixed contact and an arc extinguishing chamber arranged in the shell, wherein the arc extinguishing chamber comprises an insulating box body and metal grid plates; a through groove for moving the moving contact up and down is reserved in each metal grid plate; thefixed contact is located at the lower part of the through groove; the edge parts of the metal grid plates are connected with the insulating box body; the metal grid plates are of a stepped structure;the thickness of a far end, relative to the fixed contact, of each metal grid plate is greater than that of a near end; a plurality of bumps are arranged on the surfaces of the metal grid plates; andthe bumps on the adjacent metal grid plates are oppositely arranged. The circuit breaker is provided with the arc extinguishing chamber, so that the circuit breaker can play a quick arc extinguishingrole in arcs and the service life of the circuit breaker is prolonged.

Description

technical field [0001] The invention relates to a circuit breaker with arc extinguishing function, which belongs to the field of electric equipment. Background technique [0002] A circuit breaker is a commonly used electrical appliance in power applications and power distribution lines. Its main function is to protect the safety of electrical lines and equipment. When an electrical line or electrical equipment is overloaded or short-circuited, it can ensure And the security of the device is therefore widely used. However, since the combination and breaking of the circuit breaker is realized by a tact switch, there will be arcs during the combination and breaking process of the circuit breaker, which will delay the combination and breaking time of the circuit breaker, and burn the contacts of the tact switch of the circuit breaker. The performance is not strong, and the service life of the circuit breaker is also affected. SUMMARY OF THE INVENTION [0003] In order to so...

AI Technical Summary

Problems solved by technology

However, since the circuit breaker is combined and broken by a touch switch, there will be an arc in the process of combining and breaking the circuit breaker, which will delay the combination and breaking time of the circuit breaker, and burn the contacts of the touch switch of the circuit breaker, which is safe. The performance is not strong, and the service life of the circuit breaker is also affected

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