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Release with step type yoke structure and circuit breaker with the release

A technology of release and circuit breaker, applied in the field of release, can solve problems such as miniaturization of circuit breakers, increase in volume, complex structure of circuit breakers, etc.

Active Publication Date: 2009-02-04
SCHNEIDER ELECTRIC IND SAS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the disadvantage of the above bell armature system is that a separate heater is required, which makes the tripping system complicated and the volume increases, which in turn causes the structure of the circuit breaker to become complicated, which is not conducive to the miniaturization of the circuit breaker

Method used

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  • Release with step type yoke structure and circuit breaker with the release
  • Release with step type yoke structure and circuit breaker with the release
  • Release with step type yoke structure and circuit breaker with the release

Examples

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Embodiment Construction

[0019] Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

[0020] Such as figure 2 and image 3 As shown, the figure shows a release according to a preferred embodiment of the present invention. The release comprises a bimetal 1 made of two metals with different coefficients of thermal expansion so as to bend or deflect at a predetermined temperature, the bimetal 1 is connected to a pair of contacts not shown in the figure The disconnecting mechanism is connected so that the contact pair is disconnected by the disconnecting mechanism when it is bent or deflected. In addition, the release also includes a yoke 2, such as image 3 As shown, the cross-section of the yoke 2 is roughly U-shaped, with two arms 21 and 22 ( image 3 Not marked 21, 22), facing the two arms 21 and 22 of the yoke 2, the armature 5 is arranged, wherein the two arms 21 and 22 of the yoke 2 extend beyond the bim...

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PUM

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Abstract

The invention discloses a release which is provided with a step-like yoke structure and a breaker with such a release; wherein the release comprises double sheet metals, an armature iron and a yoke system. The yoke system is composed of a yoke and a pair of conductors which are respectively arranged at the internal side and the external side of the yoke and are electrically connected with the double sheet metals so that the current running through the conductor at the internal side of the yoke is in the same direction with the current running through the double sheet metals. With such release, the electromagnetic force exerted on the yoke can be remarkably increased, thus lowering the action current of the release so as to make the release suitable for small-rated current breakers.

Description

technical field [0001] The present invention relates generally to circuit breakers, and more particularly to a trip unit for use in a circuit breaker. Background technique [0002] Circuit breakers generally provide protection against long-term overcurrents as well as high currents caused by short circuits. This type of protection is provided in many circuit breakers by a thermal-magnetic trip mechanism, which includes a thermal trip and a magnetic trip. Such as figure 1 As shown, the thermal release is mainly composed of a bimetallic strip 1, and the bimetallic strip 1 is composed of two metals with different expansion coefficients. Therefore, when the temperature exceeds a certain value, the bimetallic strip bends or deflects. The operating mechanism is unlocked and activated, and at the same time, the contact pair is opened to complete the cutting off of the fault current, thereby protecting the load from overcurrent. [0003] The magnetic release includes an armature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/16
Inventor 陈德桂孙海涛李兴文周炎谢恩胜向洪岗
Owner SCHNEIDER ELECTRIC IND SAS
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