Circuit breaker arc-extinguishing chamber

Abstract

The invention discloses a circuit breaker arc-extinguishing chamber which comprises a fixing plate and a plurality of arc chutes. The fixing plate comprises a bottom plate and two side plates symmetrically disposed at two opposite ends of the bottom plate. A plurality of exhaust passages are uniformly distributed on the bottom plate in the length direction of the bottom plate. A plurality of groups of fixing mechanisms are uniformly distributed on the side plates along the length direction of the side plates. The exhaust passages and the fixing mechanisms are successively staggered. The fixingmechanism includes a plurality of fixing holes uniformly distributed along the width direction of the side plate. The two opposite side ends of each arc chute are provided with fixed right angles recessed inward. Each fixed right angle is provided with a fixing block matching the fixing hole at a position corresponding to the fixing hole. One end of each fixing block penetrates through the corresponding fixing hole. The circuit breaker arc-extinguishing chamber is reasonable in structural design, good in impact resistance effect, good in heat dissipation effect, can improve arc extinguishingefficiency, and can improve the working stability of the circuit breaker when used.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to an arc extinguishing chamber of a circuit breaker. Background technique [0002] Arc is a kind of gas discharge phenomenon, which is the instantaneous spark generated by the current passing through a certain medium (such as air). In daily life, when the passing current exceeds the limit value set by the circuit breaker, the circuit breaker will automatically interrupt the current. After the contacts on the circuit breaker are disconnected, the arc will be ignited. Equipment lines cause damage, and even affect personal safety. Therefore, arc extinguishing is one of the important applications of circuit breakers. At present, arc extinguishing methods commonly used in the prior art include a mechanical arc extinguishing method, a magnetic blowing arc extinguishing method, a narrow slit arc extinguishing method and a grid arc extinguishing method. [0003] Among them, the...

AI Technical Summary

Problems solved by technology

At present, the partitions in the original circuit breaker are mostly set in the box by direct nesting. Such a setting makes the impact resistance of the interior of the arc extinguishing chamber poor, which seriously affects the service life of the arc extinguishing chamber. At the same time, the existing In order to enhance the structural strength of the arc extinguishing chamber in the technology, the air outlet is set relatively small, so that the arc is not easy to eject, which in turn prolongs the arc extinguishing efficiency of the arc extinguishing chamber and affects the resistance and resistance of the entire circuit breaker. service life

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