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Arc-blowing mechanism of small-sized circuit breaker

A technology of small circuit breakers and arc plates, which is applied to circuit breaker parts and other directions, can solve the problems of inability to meet the purpose of arc extinguishing, and achieve the effects of improving arc extinguishing ability, enhancing magnetic field strength, and speeding up movement speed.

Active Publication Date: 2017-10-03
SHANGHAI LIANGXIN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of low-voltage electrical technology, miniature circuit breakers are required to be able to break, connect, and carry larger currents in a smaller volume. The purpose of arc extinguishing under high current state

Method used

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  • Arc-blowing mechanism of small-sized circuit breaker
  • Arc-blowing mechanism of small-sized circuit breaker
  • Arc-blowing mechanism of small-sized circuit breaker

Examples

Experimental program
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Effect test

Embodiment

[0024] as attached figure 1 , as shown in 2 and 3, an arc blowing mechanism of a small circuit breaker, which includes a cover arc plate 1, a cavity 101 is provided inside the cover arc plate 1, and the arc strike plate 2 is inserted into the cavity 101 and extends at both ends. Out of the cavity 101, the cover arc plate 1 is provided with a first installation groove 102, and the combined magnetic guide plate 3 is inserted in the first installation groove 102 from the front side, and the magnetic field can be induced by the changing current in the arc striker plate 2, so The combined magnetic plate 3 includes a left side plate 301 and a right side plate 302, the left side plate 301 and the right side plate 302 are connected together through the bottom plate 303, and the left side plate 301 and the right side plate 302 are respectively inserted into the first installation groove 102 in the left groove 102a and right groove 102b.

[0025] The cover arc plate 1 is provided with ...

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PUM

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Abstract

Disclosed is an arc-blowing mechanism of a small-sized circuit breaker. The arc-blowing mechanism is characterized by comprising an arc cover plate (1); a hollow cavity (101) is formed in the arc cover plate (1); an arc striking plate (2) is inserted in the two ends in the hollow cavity (101) to extend out of the hollow cavity (101); a first mounting groove (102) is formed in the arc cover plate (1); and a combined magnetic conducting plate (3) is inserted in the first mounting groove (102) from the front side surface to induce a magnetic field by the changeable current in the arc striking plate (2). By virtue of the arc-bowing mechanism, the electric arc movement speed is accelerated, the magnetic field intensity is reinforced and arc extinguishing capability is improved; and in addition, arc extinguishing in the current state can be realized, and meanwhile, the requirement on the volume of the small-sized circuit breaker can be satisfied.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers, and in particular relates to an arc blowing mechanism of a small circuit breaker, which can improve the arc extinguishing capability of the circuit breaker. Background technique [0002] When the circuit breaker has a fault current, an arc will be generated between the movable and static contacts at the moment when the movable and static contacts are opened, and most of the arcs will be led to the arc extinguishing chamber through the arc striking angle and extinguished. However, a small part of the arc sometimes leaks out from the gap between the handle and the housing along the opposite direction. On the one hand, the leaked arc may burn the handle black, which will affect the operating performance and reliability; harm to the body. [0003] The arc extinguishing ability of the circuit breaker determines the safety performance of the circuit breaker. In the internal arc extinguishing...

Claims

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Application Information

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IPC IPC(8): H01H73/18
CPCH01H73/18
Inventor 冯洪宝杨艳群陈妍儒张伟王松涛曹文渠潘万军
Owner SHANGHAI LIANGXIN ELECTRICAL
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