An Improved Circuit Breaker

Abstract

The invention relates to an improved circuit breaker, which includes a housing, a circuit protection action mechanism located in the housing, matching moving contacts and static contacts, and an arc extinguishing device, and also includes a tripping mechanism. The tripping mechanism includes a tripping mechanism. The buckle rotor, the driving part that drives the trip rotor to rotate, the movable contact is set on the trip rotor; the trip rotor is provided with a buckle mechanism, and the driving part cooperates with the buckle mechanism to control the snap-in or disengagement of the buckle mechanism , The circuit protection action mechanism cooperates with the buckle mechanism to drive the buckle mechanism to disengage. The design of the buckle structure of the present invention separates the disengagement force from the contact pressure. No matter how much the contact pressure is, the disengagement force will never become larger, so that the pressure between the contacts can meet the needs of the circuit breaker in circuits with different currents. The requirements of the environment, the release force of the tripping mechanism will not change, the sensitivity of the circuit breaker will not be affected, the versatility of the circuit breaker is wider, and the entire circuit breaker is easy to install and simple in structure.

Description

technical field [0001] The invention relates to a circuit breaker which provides overload and short-circuit protection for electrical circuits and electrical equipment, in particular to an improved circuit breaker. Background technique [0002] At present, there are various types of circuit breakers with different working principles. One type of circuit breaker uses circuit protection mechanisms such as short-circuit current relays and bimetallic strips and a tripping mechanism that cooperates with these protection mechanisms, and sets the movable contact on the tripping mechanism to monitor the circuit through the circuit protection mechanism. In case of overload, short circuit, etc., the corresponding action is used to drive the tripping mechanism to separate the moving contact from the static contact to realize the disconnection protection of the circuit. [0003] In this type of circuit breaker, the key points of the scheme mainly focus on the linkage and cooperation re...

AI Technical Summary

Problems solved by technology

However, in the existing circuit breaker and the circuit breaker of this scheme, after the contact pressure increases, the disengagement force of its tripping will also increase correspondingly, which requires greater force to operate when disengaging, which is very difficult. Greatly affects the sensitivity of the circuit breaker

Therefore, its versatility is poor, and it cannot be applied to circuit environments with different currents.

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