Frame-type circuit breaker arc striking and extinguishing device and contact arc extinguishing system

Abstract

The invention discloses a frame type circuit breaker arc striking and extinguishing device and a contact arc extinguishing system. The frame-type circuit breaker contact arc extinguishing system comprises a frame-type circuit breaker arc striking and extinguishing device, wherein a lower end of an arc striking sheet in the arc striking and extinguishing device of a frame-type circuit breaker is provided with a contact system corresponding to the arc striking sheet, the contact system is arranged in an arc isolating cover, a contact support is arranged below the contact system, fixed clamping plates are arranged on a left side and a right side of the contact support respectively, a left end and a right end of the arc isolating cover are connected with the two fixed clamping plates respectively, the arc isolating cover and a lower end of the contact support are arranged on the support, and a bus is arranged on the support. The system is advantaged in that electric arcs led out through the arc striking and extinguishing device are led into the contact arc extinguishing system, the breaking current and arc extinguishing performance of the circuit breaker contact system can be effectively improved, burning loss of a main contact of the contact system is effectively reduced, the actual service life of the contact system is prolonged, and the actual service life cycle of the contact system and a circuit breaker is prolonged.

Description

Technical field [0001] The invention relates to a frame type circuit breaker arc ignition arc extinguishing device and a contact arc extinguishing system, belonging to the technical field of low-voltage electrical appliances. Background technique [0002] Frame type circuit breakers are important components in low-voltage power distribution systems. They are usually used as incoming line main switch or branch main switch, used in the distribution network to distribute electrical energy, protect lines and power equipment, and avoid overload , Undervoltage, short circuit, single-phase grounding and other faults. [0003] Frame type circuit breakers are used to make, break and carry rated operating current and short circuit, overload and other fault currents. When overload, short circuit, voltage drop or disappear in the circuit, it can automatically cut off the circuit for reliable protection. The circuit breaker contact arc extinguishing system plays the role of carrying the main c...

AI Technical Summary

Problems solved by technology

In the prior art, the general contact system does not have an independent arc contact or / and an arc ignition and arc extinguishing device arranged according to the arc contact. The contact system and the arc extinguishing system cannot cooperate well, and the breaking and arc extinguishing performance is not high. Circuit breaker electrical life, breaking life is not high

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