Static contact arc extinguishing module with double arc extinguishing chambers for circuit breaker

Abstract

The invention relates to a static contact arc extinguishing module with double arc extinguishing chambers for a circuit breaker. The static contact arc extinguishing module comprises a static contactand an arc extinguishing component, wherein one end of the static contact is provided with a rectangular bending current limiting part; the bending current limiting part is provided with a static contact; the other end of the static contact is provided with a straight wiring plate part; the arc extinguishing component includes an insulating cover, a magnetizing plate, a first arc extinguishing chamber and a second arc extinguishing chamber; the middle part of the insulating cover is provided with a magnetic blowing chamber wrapping the outside of the static contact; the magnetic blowing chamber communicates with the inside of the first arc extinguishing chamber; one end of the magnetizing plate is provided with a U-shaped bending part wrapping both sides of the static contact; the other end of the magnetizing plate is provided with an upward bending arcing foot; two ends of the bending part pass through the bending current limiting part, and are inserted into both sides of the magneticblowing chamber; and a tail part of the arcing foot passes through the magnetic blowing chamber and extends into the first arc extinguishing chamber. The static contact arc extinguishing module has the advantages of simple structure, stable and reliable performance, convenience in assembly, and capabilities of effectively prolonging the service life of circuit breakers and improving the breakingcapacity of the circuit breaker.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a static contact arc extinguishing module with double arc extinguishing chambers for a circuit breaker. Background technique [0002] A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. The circuit breaker has overload, short circuit and undervoltage protection functions, which can protect lines and power supply equipment from damage, and can also provide protection for fire hazards that may be caused by long-term ground faults that cannot be detected by overcurrent protection. The molded case circuit breaker includes a plastic case, an operating mechanism, a contact system, and an arc extinguishing system. The structural design of the arc extinguishing system of the existing molded case circuit breaker is un...

AI Technical Summary

Problems solved by technology

The molded case circuit breaker includes a plastic case, an operating mechanism, a contact system, and an arc extinguishing system. The structural design of the arc extinguishing system of the existing molded case circuit breaker is unreasonable. The structural design of the arc extinguishing system cannot be integrated and modularized, and the assembly is not convenient enough. As a result, the arc extinguishing effect is not ideal, and the contacts are easily burned, so the breaking capacity of the circuit breaker is low

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