Tripping mechanism of residual current operated circuit breaker

Abstract

The invention discloses a tripping mechanism of a residual current operated circuit breaker. The tripping mechanism comprises a base fixed on a shell of the circuit breaker, wherein a tripping interlocking bar is arranged between a movable iron core and a tripping indicating piece; the tripping interlocking bar comprises a first interlocking part, a second interlocking part and a rotating part; the rotating part is provided with a rotating shaft for installing the tripping interlocking bar on the base in a pivoting manner; the first interlocking part is connected with the movable iron core; the second interlocking part is provided with a tripping boss for outputting tripping actions; the tripping boss extends outwards and is connected with an operating mechanism in an interlocking manner; a notch concavely formed inwards is formed in one side of the first interlocking part; the tripping indicating piece is provided with an abutting boss matched with the notch, in which a tripping spring is used for driving the tripping indicating piece to stretch out of a tripping hole; the abutting boss abuts against the first interlocking part all the time and slides relative to the first interlocking part, so that the driving force for rotating the tripping interlocking bar is improved, the tripping force can be effectively improved, and the tripping speed and stability are improved.

Description

technical field [0001] The invention relates to the field of residual current operated circuit breakers, more specifically, it relates to a tripping mechanism of residual current operated circuit breakers. Background technique [0002] A residual current operated circuit breaker usually includes a contact device, an operating mechanism that controls the opening / closing of the contact device, and a tripping mechanism that controls the operating mechanism to perform tripping. The tripping mechanism is provided with a tripping shaft, and the tripping mechanism needs to pass The tripping of the circuit breaker can only be implemented by triggering the tripping axis to control the operating mechanism to perform tripping. [0003] In the residual current action protector, the residual current action function of the product is realized by directly driving the circuit breaker part of the action through the tripping mechanism of the leakage module. During the action, the tripping mod...

AI Technical Summary

Problems solved by technology

The driving force for tripping is provided by the energy storage device, and the driving force of the energy storage device depends on the parameters of the tripping coil and the moving and static iron core; due to the use environment of the residual current operated protector, the power supply voltage of the leakage module is unstable. When a low voltage occurs, the driving force of the energy storage device of the leakage module may be relatively small. At this time, a leakage fault may occur, and the residual current action protector may not be able to cut off the fault power supply, or the cutoff may not be timely, which may cause a leakage accident.

[0005] To solve the above problems, the parameters of the release cannot be increased blindly, otherwise the impact force of the electric release at the rated voltage will be too large, the life of the residual current-operated protector will be shortened, and the cost will also be reduced. waste

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