Circuit breaker

Abstract

A disclosed circuit breaker comprises a shell, at least one main chamber and an auxiliary chamber, the at least one main chamber is arranged at one side of the auxiliary chamber side by side and comprises a first cavity and a second cavity, and the inner side of the shell is provided with a first arc distribution channel, a second arc distribution channel and a third arc distribution channel, the first arc dividing channel, the second arc dividing channel and the third arc dividing channel are separated through arc striking walls arranged on the inner side of the shell, the inlet end and the outlet end of the first arc dividing channel are communicated with the first cavity and the second cavity respectively, a first through hole and a second through hole are formed in the outer side of the shell, a circuit board is arranged in the auxiliary cavity, A conductor is arranged on the circuit board, the shell comprises a partition wall, a through hole is formed in the partition wall, and the conductor penetrates through the through hole and then is connected with the wire holder in the second cavity in a matched mode. Compared with the prior art, the circuit breaker provided by the invention has the advantages of fewer parts, more compact structure and better arc extinguishing effect.

Description

technical field [0001] The invention relates to the field of low-voltage electricity, in particular to a circuit breaker. Background technique [0002] Traditional circuit breakers usually include a housing, a tripping mechanism set in the main chamber of the housing, a moving and static contact mechanism, an operating mechanism, an arc extinguishing mechanism, a terminal block, etc., wherein the inlet end of the arc extinguishing mechanism is set at the At the position corresponding to the head mechanism, the outside of the housing is usually provided with a through hole corresponding to the outlet end of the arc extinguishing mechanism. With such a structural design, the arc can be guided along the through hole toward the outside of the housing by using the airflow generated during the breaking. Discharge, can reduce the harm of arc. In addition, the sub-chamber of the housing is usually equipped with a detection module for detecting the opening and closing state and temp...

AI Technical Summary

Problems solved by technology

[0004] (1) The arrangement of wires and heat conductors increases the number of internal components of the circuit breaker, which increases the cost and complexity of the assembly process, and is not conducive to the compactness of the circuit breaker

[0005] (2) The arc generated when the circuit breaker is broken usually still has strong energy after being weakened by the arc extinguishing mechanism. The arc extinguishing structure of the traditional circuit breaker is difficult to eliminate or discharge the remaining arc in time, and the arc extinguishing effect needs to be improved

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