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A multi-loop circuit breaker

A circuit breaker and multi-circuit technology, which is applied in the direction of circuit breaker components, circuit breaker contacts, etc., can solve the problems of reducing the short-circuit breaking capacity of circuit breakers, weakening and reducing excitation capacity, etc., achieving ingenious structure, reducing internal resistance, and improving The effect of breaking ability

Pending Publication Date: 2019-01-18
厦门国研科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the number of coil turns of the electromagnetic mechanism is reduced, the excitation capacity is weakened, and the short-circuit breaking capacity of the circuit breaker is reduced.
Most of the 18mm wide miniature circuit breakers on the market can only achieve a rated current of 100A and a breaking capacity of 6kA.

Method used

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  • A multi-loop circuit breaker
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  • A multi-loop circuit breaker

Examples

Experimental program
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Effect test

Embodiment 2

[0045] see Figure 6 to Figure 8 , a multi-circuit breaker, the main structure of which is the same as that of Embodiment 2, the difference being that: the thermal release mechanism 70 also includes at least one second auxiliary current circuit, the second auxiliary current circuit is connected in parallel with the bimetal 71, and the second The number of auxiliary current loops can be one, two or even more. The second auxiliary current circuit includes an auxiliary contact plate 74 rotatably connected in the casing 10, one end of which is electrically connected to the outlet terminal 30 through a connecting wire 73, and the other end is provided with a first auxiliary contact 75, the movable contact plate 72 The top of the other side is correspondingly provided with a second auxiliary contact 76 , and when the first auxiliary contact 75 is in conductive contact with the second auxiliary contact 76 , the second auxiliary current circuit can be connected.

[0046] This embodim...

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Abstract

A multi-loop circuit breaker comprises an incoming terminal, an outgoing terminal, an electromagnetic mechanism, a static contact, a movable contact and a thermal stripping mechanism. The electromagnetic mechanism is provided with a coil and a movable iron core, one end of the coil is electrically connected with an incoming terminal, and the movable iron core is located in the coil and movable along the axis thereof; The static contact is electrically connected with the coil, and the movable contact is electrically connected with the thermal stripping mechanism. the multi-loop circuit breakerfurther comprises a linkage rod and at least a first auxiliary current circuit, the first auxiliary current circuit being coupled in parallel with the electromagnetic mechanism; The linkage rod is rotatably arranged, one end of the linkage rod is linked with one end of the movable iron core, and the other end of the linkage rod is in contact with the first auxiliary current circuit. When the shortcircuit occurs, the movable iron core moves to drive the linkage rod to rotate so that the first auxiliary current circuit is first disconnected, and then the static contact is separated from the movable contact. The invention can improve the rated current of the circuit breaker and the short-circuit breaking ability of the circuit breaker.

Description

technical field [0001] The invention relates to the field of circuit breakers, in particular to a multi-circuit circuit breaker. Background technique [0002] The electromagnetic trip mechanism is an important functional part of a miniature circuit breaker, which is mainly composed of a coil, a moving iron core and a static iron core. The moving iron core and the static iron core are located in the inner cavity of the coil. Under normal working current, there is a certain gap between the moving iron core and the static iron core. When the moving iron core moves in the same direction, the tripping mechanism of the contact mechanism of the circuit breaker is pushed by the push rod to open the contact. [0003] Generally, the more turns of the coil of the electromagnetic mechanism, the stronger the magnetic field it generates under the short-circuit current, the faster the opening speed of the moving iron core-driven contact mechanism, and the stronger the short-circuit breaki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/02H01H73/04H01H73/18
CPCH01H73/02H01H73/04H01H73/18
Inventor 王慧德徐明
Owner 厦门国研科技有限公司
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