Arc striking device of circuit breaker

Abstract

The invention discloses an arc striking device of a circuit breaker. The device comprises a circuit breaker shell, an open circuit driving apparatus, an arc extinguishing apparatus, a conductive system and a tripping mechanism. The tripping mechanism comprises a movable contact. The conductive system comprises a conducting strip and a static contact. The conducting strip is electrically connected to the movable contact through a lead. An arc striking groove is arranged on the circuit breaker shell of two sides of the static contact. The arc striking groove is connected to the arc extinguishing apparatus. One side of the conducting strip is provided with an arc striking plate. An arc striking angle is arranged on a lower side of the static contact. The arc striking angle is connected to the arc extinguishing apparatus through an arc striking sheet. An arc magnetic blowout effect is good, an arc striking speed is fast, the structure is simple, cost is low, assembling is convenient and a circuit breaker breaking capacity is greatly increased.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to an arc striking device of the circuit breaker. Background technique [0002] At present, human life is inseparable from electric energy, and various protectors for protecting circuits have emerged as the times require. Among them, circuit breakers are one of the common circuit protectors, which are used for short-circuit protection when the circuit is overloaded. When the circuit is short-circuited or overloaded In the process of cutting off the circuit, a large number of arcs will be generated. The arc generation is accompanied by high temperature and high pressure. If the arc is not evacuated in time, it is easy to break down or burn the circuit breaker, which will seriously affect the circuit breaker. Although the arc extinguishing effect of the existing arc extinguishing device is very good, it is a technical problem to be solved to introduce the arc into the arc extinguishing device, a...

AI Technical Summary

Problems solved by technology

[0002] At present, human life is inseparable from electric energy, and various protectors for protecting circuits have emerged as the times require. Among them, circuit breakers are one of the common circuit protectors, which are used for short-circuit protection when the circuit is overloaded. When the circuit is short-circuited or overloaded In the process of cutting off the circuit, a large number of arcs will be generated. The arc generation is accompanied by high temperature and high pressure. If the arc is not evacuated in time, it is easy to break down or burn the circuit breaker, which will seriously affect the circuit breaker. Although the arc extinguishing effect of the existing arc extinguishing device is very good, it is a technical problem to be solved to introduce the arc into the arc extinguishing device, and the circuit breaker in the prior art is damaged due to poor arc ignition ability. Affects the service life and safety of electricity use, and the arc striking device of some circuit breakers is complex in structure and production process, resulting in high cost

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