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Moving contact structure with high breaking capacity

A moving contact and high-breaking technology, which is applied to circuit breaker contacts, circuit breaker components, etc., can solve problems such as circuit breaker loss of function, arc extinguishing failure, and large short-circuit arc, and achieve high rated short-circuit breaking capacity and reduce Freeness, effect of preventing reignition

Inactive Publication Date: 2012-06-27
SHANGHAI ELECTRICAL APP RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the indicators of the short-circuit breaking capacity of the circuit breaker continue to increase, the short-circuit arc generated between the dynamic and static contacts will become larger, directly threatening the dynamic and static contacts themselves, causing them to burn and cause arc extinguishing failure, so that the circuit breaks loss of function

Method used

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  • Moving contact structure with high breaking capacity
  • Moving contact structure with high breaking capacity
  • Moving contact structure with high breaking capacity

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Embodiment Construction

[0016] In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.

[0017] Such as figure 1 As shown, a moving contact structure with high breaking capacity provided by the present invention is composed of a moving contact 2, a moving contact conductive plate 3 and an arc carrier 1 and other parts. The movable contact 2 is formed on the movable contact conductive plate 3, and the arc carrier 1 is generally located on the upper part of the movable contact 2, which is directly related to the direction of the final arc striking.

[0018] The material selected for the arc carrier 1 should firstly have a certain electrical conductivity, and secondly have a burning resistance, so that it can withstand the high temperature of the arc and prevent the generation of metal particles. For example, tungsten, molybdenum, tungsten or molybdenum alloys can be used And tungsten or molybdenum powder metallurgy and...

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Abstract

The invention provides a moving contact structure with high breaking capacity, which comprises a moving contact electric conducting plate, a moving contact and an arc loading sheet and is characterized in that the arc loading sheet is arranged on the moving contact. When the moving contact structure is short-circuit and a breaker breaks short-circuit current, and during an arc continuing process, burning loss of a moving contact and vaporized copper particles caused by the burning loss can be reduced. Therefore, freeness in gas is reduced, recovery voltage can be built fast, restrike of an arc between contacts is avoided, and the breaker can have higher rated short-circuit breaking capacity.

Description

technical field [0001] The invention relates to a main contact structure of a low-voltage circuit breaker. Background technique [0002] Under normal circuit conditions, low-voltage circuit breakers can connect, carry and break high currents to achieve the purpose of power supply, power failure and conversion circuits. When the power grid is overloaded or short-circuited, the circuit breaker can also break the overload or short-circuit current and disconnect the load from the power grid, thereby avoiding endangering the safety of operators or the normal operation of equipment. During the breaking process of the circuit breaker, the arc between the moving and static contacts is introduced into the arc extinguishing system through measures such as arc striking or blowing, and finally the extinguishing of the arc is realized. [0003] With the continuous improvement of the short-circuit breaking capacity index of the circuit breaker, the short-circuit arc generated between the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/04H01H73/18
Inventor 陆旻黄钦俊顾烨华周安康
Owner SHANGHAI ELECTRICAL APP RES INST
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