Improved circuit breaker

Abstract

The invention relates to an improved circuit breaker, comprising a casing, a circuit protection actuating mechanism, a traveling contact, a stationary contact, an arc extinguisher and a disengaging mechanism, wherein the circuit protection actuating mechanism is positioned in the casing; the traveling contact is matched with the stationary contact; the disengaging mechanism comprises a disengagingrotor and a drive component to drive the disengaging rotor to rotate, and the traveling contact is arranged on the disengaging rotor; a buckling mechanism is arranged on the disengaging rotor; the drive component cooperates with the buckling mechanism to control the buckling mechanism to buckle or disengage; and the circuit protection actuating mechanism cooperates with the buckling mechanism todrive the buckling mechanism to disengage. The design of the buckling mechanism in the invention separates the disengaging force from the contact pressure, and therefore, no matter how high the contact pressure is, the disengaging force can not increase all along, so that the pressure between the contacts can meet the requirements for the circuit breaker in a circuit environment with different current magnitudes; the disengaging force of the disengaging mechanism can not change, the sensitivity of the circuit breaker can not be affected, and the circuit breaker has a wider universality; and the whole circuit breaker has the advantages of convenient installation and simple 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 tripping mechanisms that cooperate with these protection mechanisms, and sets the moving contacts 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 rela...

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.

Images