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Direct current circuit breaker

A DC circuit breaker and moving contact technology, applied in the direction of protection switch operation/release mechanism, etc., can solve the problems that cannot meet the design requirements of fast and reliable breaking, and the energy of repulsion disc can not be effectively used, so as to shorten the inherent opening time and improve Rated co-current capability, easy to control effect

Inactive Publication Date: 2014-12-10
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that the spring operating mechanism of the DC circuit breaker cannot meet the design requirements of fast and reliable breaking, and also solves the technical problem that the energy of the repulsion plate cannot be effectively utilized during the use of the high-speed electromagnetic repulsion device

Method used

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Embodiment Construction

[0026] The present invention will be further explained below in conjunction with the accompanying drawings.

[0027] Refer to attached figure 1 , The preferred example of the present invention is a DC circuit breaker with anti-shock and vibration fast repulsion trip mechanism and repulsion compensation, including key modules such as bracket, conductive circuit, electric repulsion compensation, anti-shock vibration, and quick trip. The frame 24 plays the role of fixing each module and other components. The conductive circuit is composed of upper busbar 1, static contact 3, moving contact 4, moving contact guide rod 5, soft connection 21, conductive block 20, and lower busbar 2. The upper busbar 1 is a flat copper bar placed horizontally, fixed on the frame 24, and a static contact 3 is protrudingly installed at the lower part of a section, and a static contact of silver-based material is installed on the static contact 3.

[0028] When the circuit breaker is in the closed and...

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Abstract

The invention discloses a direct current circuit breaker. The invention provides a quick repulsive force tripping mechanism for preventing impact vibration and an integrative method for a repulsive force compensation structure. The direct current circuit breaker disclosed by the invention can effectively tolerate mechanical shocks such as bumping vibration, the false tripping probability is extremely small, and the reliability is high in normal working process. Meanwhile, a repulsive force disc is utilized as a reaction device for the tripping mechanism, and the energy opening of the repulsive force disc is utilized, so that the movement speed of the direct current circuit breaker is obviously improved, and the inherent opening time of the circuit breaker is greatly shortened. Moreover, the structure of a moving contact guide rod is utilized by the direct current circuit breaker disclosed by the invention, and the driving spring force for opening is converted into holding power between a static contact and a moving contact during opening work, so that the moving contact is not repelled under the condition of high short-circuit current, and the short-time endurance capacity of the direct current circuit breaker is improved.

Description

technical field [0001] The invention belongs to the field of DC circuit breakers, in particular to a DC circuit breaker which utilizes the principle of a repulsive force disc and a quick tripping mechanism to prevent shock and vibration, and uses repulsive force compensation to improve short-term tolerance. Background technique [0002] Due to the unique advantages of the DC power supply system, people pay more and more attention to the research of the DC power supply system, and the connection between the DC power supply system and daily life is getting closer and closer. At present, many important industries such as urban trolleybus, subway, smelting, chemical industry, solar power generation, rolling material, ship power, mining and so on have adopted DC power supply system. [0003] The DC circuit breaker is the guarantee for the safe operation of the DC power supply system. It has the protection function of cutting off the fault current of the circuit and is the most im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/10H01H71/42
Inventor 吴翊杨飞韩书谟胡杨钟建英袁端磊荣命哲满家健
Owner XI AN JIAOTONG UNIV
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