Breaker structure achieving quick tripping through electro-dynamic repulsion force

An electric repulsion and circuit breaker technology, applied in the direction of protection switch operation/release mechanism, etc., can solve the problems of mechanism tripping and circuit breaker opening, circuit breaker failure, arc fall, etc., to achieve fast and reliable action and avoid secondary fall , to avoid the effect of contact welding

Inactive Publication Date: 2015-02-25
ZHEJIANG TENGEN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In reality, when the moving contact is repelled by the electric repulsion to generate an arc, due to the hysteresis of the electromagnetic mechanism and its own operating time, the electromagnetic mechanism cannot timely trip the mechanism and open the circuit breaker, resulting in an arc Burning between the moving and static contacts for a long time and falling back after the moving contact is repelled, in severe cases, the moving contact can be closed with the static contact for a second time after falling back, resulting in welding of the contacts and failure of the circuit breaker

Method used

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  • Breaker structure achieving quick tripping through electro-dynamic repulsion force
  • Breaker structure achieving quick tripping through electro-dynamic repulsion force
  • Breaker structure achieving quick tripping through electro-dynamic repulsion force

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Embodiment Construction

[0015] Combine now figure 1 , figure 2 , image 3 To further illustrate the present invention, a circuit breaker structure that uses electric repulsion to trip quickly includes a base 1, a static contact assembly 2, a rotatable moving contact assembly and an operating mechanism 4, and the moving contact assembly 3 The right side is also provided with an unlocking lever 6. The unlocking lever 6 is connected to the operating mechanism 4 through a pin shaft. The lower end of the unlocking lever 6 interacts with the moving contact assembly, and the upper end of the unlocking lever 6 interacts with the operating mechanism. 4 phases, the moving contact assembly includes a pusher 51 that can push the unlocking lever 6, and the pusher 51 can be integrated with the moving contact body 3 or a separate structure, the moving contact assembly When repelled and opened by electric repulsion, the moving contact assembly drives the pusher 51 to push the unlocking lever 6 to rotate around th...

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Abstract

The invention provides a breaker structure achieving quick tripping through electro-dynamic repulsion force. In the process that moving contacts are repulsed by electro-dynamic repulsion force, a breaker operation mechanism can be triggered synchronously so that the mechanism can be quickly tripped before an electromagnetic system acts, the acting time of the mechanism is shortened, secondary falling of the moving contacts and contact fusion welding are avoided, short circuit breaking capacity of the breaker is improved, and actions are quick and reliable.

Description

technical field [0001] The invention relates to the technical field of low-voltage circuit breakers, in particular to a structure of a circuit breaker that utilizes a movable contact trigger mechanism to trip quickly. Background technique [0002] Low-voltage circuit breakers can be used for short-circuit current protection of lines. For some current-limiting circuit breakers, before the actual fault short-circuit current of the line reaches the peak value of the expected short-circuit current of the line, the moving contacts will be repulsed under the action of electric repulsion to generate an arc, thereby limiting the further increase of the short-circuit current . Then the electromagnetic protection mechanism of the circuit breaker will drive the operating mechanism to act, the circuit breaker will trip and open, the arc will be extinguished, and the short-circuit fault current will be cut off. [0003] In reality, when the moving contact is repelled by the electric re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/12
CPCH01H71/12
Inventor 丁国辉陆俊谦
Owner ZHEJIANG TENGEN ELECTRIC
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