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Circuit breaker

A technology for circuit breakers and moving contacts, applied in high-voltage air circuit breakers, circuits, electrical components, etc., can solve the problems of limited current limiting capacity, difficulty in entering all grids, and contact ablation.

Pending Publication Date: 2020-10-27
XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. During the arc extinguishing process, one end of the arc has been burning on the moving contact, and the contact is severely ablated under the action of the arc, which affects the electrical life;
[0005] 2. During the arc extinguishing process, it is difficult for the arc to enter all the grids, which affects the arc extinguishing performance;
[0006] 3. In the initial stage of the opening of the moving and static contacts, the arc running is relatively slow, the arc can only be cut by a small number of grids, the arc voltage is difficult to increase in a short time, and the current limiting capability is limited

Method used

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Embodiment Construction

[0050] To further illustrate the various embodiments, the present invention is provided with accompanying drawings. These drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments, and can be combined with related descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should understand other possible implementations and advantages of the present invention. Components in the figures are not drawn to scale, and similar component symbols are generally used to denote similar components.

[0051] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0052] refer to Figure 1-Figure 5 As shown, as a preferred embodiment of the present invention, a circuit breaker is provided, including a housing, an operating mechanism 2 installed on the housing, a contact system 3...

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Abstract

The invention relates to a circuit breaker, and particularly relates to an improvement of an arc extinguishing system of the circuit breaker. The circuit breaker comprises a contact system, wherein the contact system comprises a moving contact and a static contact, a magnetism increasing assembly is arranged around the moving contact, and the magnetism increasing assembly is encircled to form a magnetism increasing space which approximately surrounds the static contact and the moving contact. Through reasonable arrangement of the magnetism increasing assembly, the moving contact and an arc running channel, the arc running speed of the arc is increased, the arc extinguishing efficiency is improved, the arc is fully extinguished by an arc extinguishing grid pieces, and meanwhile, the arc jumps to the arc running channel from the moving contact as soon as the moving contact is repelled, so that the situation that the moving contact is continuously ablated and the electrical service life is affected is prevented.

Description

technical field [0001] The present invention relates to a circuit breaker, and more particularly relates to the improvement of the arc extinguishing system of the circuit breaker. Background technique [0002] When the circuit breaker is broken, the initial distance between the moving contact and the static contact is small, and the electric field strength is high, and an arc will be generated between the moving and static contacts. If the arc is not extinguished, the circuit cannot be completely disconnected. Moreover, the temperature of the arc is very high, and the high-temperature arc will burn out the equipment and cause serious accidents. Therefore, it is one of the important functions of the circuit breaker to quickly and effectively extinguish the arc generated when the circuit breaker is broken. [0003] The use of arc extinguishing grids to extinguish arcs is a conventional arc extinguishing method at present. Usually, the arc moves towards the arc extinguishing g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/664H01H33/666
CPCH01H33/664H01H33/666
Inventor 林耀国王应波林新德黄蔚偈卓江海张金泉
Owner XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
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