Improved breaker

Abstract

The invention relates to an improved breaker, which comprises a shell, a circuit protection actuating mechanism, a moveable contact, a fixed contact and an arc suppressing device and also comprises a tripping mechanism, wherein the tripping mechanism comprises a burst jump rack, a tripping rotor and a drive part; the moveable contact is arranged on the tripping rotor; the burst jump rack is matched with the tripping rotor to control the quick joint of the contacts; the tripping rotor is provided with a clamping mechanism; the drive part is matched with the clamping mechanism to control the clamping or separation of the clamping mechanism; and the circuit protection actuating mechanism is matched with the tripping mechanism to drive the separation of the clamping mechanism. The design of the clamping mechanism in the breaker ensures that a separation force is separated from a contact pressure, no matter how big the contact pressure is, the separation force is always kept constant, so that the pressure between the contacts can meet the requirements of the breaker in circuit environments with different current volumes, while the separation force of the tripping mechanism is not changed. Thus, the breaker has the advantages that: sensitivity is not affected; universality is higher; installation is convenient; and a structure is simple.

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, the contact life is poor, and it cannot be applied to circuit environments with different currents.

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