A circuit breaker

By using magnetic enhancement components and an optimized arc extinguishing system in the circuit breaker, the problem of difficulty in extinguishing the arc quickly is solved, the arc arc running speed and arc extinguishing efficiency are improved, and the life of electrical equipment is extended.

CN111834162BActive Publication Date: 2025-03-25XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
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Patent Information

Application Number
CN202010663853.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-07-10
Publication Date
2025-03-25
Estimated Expiration
2040-07-10

AI Technical Summary

Technical Problem

The arc generated by existing circuit breakers is difficult to quickly and effectively extinguish the arc during disconnection, resulting in high arc temperature, burning out the equipment, and severe ablation of the dynamic contacts, affecting the electrical life.

Method used

A structurally optimized circuit breaker is designed, using a magnetically enhanced assembly to surround the dynamic and static contacts, combined with an arc extinguishing system, including the first arc running channel, the second arc running channel and the magnetically increased block, to improve the arc running speed and arc extinguishing efficiency.

Benefits of technology

By enhancing the arc running speed and arc extinguishing efficiency of the arc, avoiding the continuous ablation of the moving contacts, extending the electrical life, and ensuring that the arc is completely extinguished in a short period of time.

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Abstract

The present invention relates to a circuit breaker, and specifically to an improvement of an arc extinguishing system of the circuit breaker, including a contact system, wherein the contact system includes a moving contact and a stationary contact, and a magnetizing component is arranged around the moving contact, and the magnetizing component encloses and forms a magnetizing space that roughly surrounds the stationary contact and the moving contact. The present invention increases the arc running speed of the arc by setting the magnetizing component and reasonably arranging the moving contact and the arc running track, thereby improving the arc extinguishing efficiency, so that the arc is fully extinguished by the arc extinguishing grid, and at the same time, the arc can jump from the moving contact to the arc running track when the moving contact is just repelled, thereby preventing the moving contact from being continuously ablated and affecting the electrical life.
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