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A quick repulsion tripping mechanism and tripping method for a DC circuit breaker

A technology of DC circuit breaker and tripping mechanism, which is applied in the direction of protection switch operation/release mechanism, etc., which can solve the problems of slow movement speed, large volume, and difficulty in conveniently arranging its space placement.

Active Publication Date: 2011-12-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used electromagnet tripping device and similar mechanisms move slowly, because the short-circuit fault current flows through the coil, so it is constantly affected by the magnitude of the short-circuit current during the movement
In addition, this type of electromagnetic repulsion breaking mechanism includes several parts such as the opening coil, the closing coil and the metal plate. The volume is relatively large, and it is not easy to conveniently arrange its spatial placement.

Method used

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  • A quick repulsion tripping mechanism and tripping method for a DC circuit breaker
  • A quick repulsion tripping mechanism and tripping method for a DC circuit breaker
  • A quick repulsion tripping mechanism and tripping method for a DC circuit breaker

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the drawings and embodiments.

[0022] See figure 1 , This kind of quick tripping machine design using repulsion disk used in DC circuit breaker includes repulsion disk, drive connecting rod, trip pushing part, trip push rod. Among them, the repulsion disk part, the current coil and the metal disk (the material can be copper or aluminum) are encapsulated in the repulsion disk shell, placed up and down, with a certain gap between the two. The current coil is connected to a capacitor DC discharge circuit controlled by a thyristor, and its capacitor has been charged with a suitable level of voltage.

[0023] See figure 2 , When in the locked state, the slot in the middle of the trip push rod is buckled with the trip buckle, the right end of the push rod is connected with the spring barrel, and the left end is provided with a downward pulling force by a buckle retaining spring to ensure that the buckle re...

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PUM

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Abstract

The invention discloses a rapid repulsion tripping mechanism for a direct-current circuit breaker and a tripping method thereof. The repulsion-tray tripping mechanism has high response speed and small dispersivity and is not affected by the changes of external short-circuit current during the motion process. A tripping pusher is directly driven to rapidly trip by an electromagnetic repulsion force which is generated due to the eddy current effect of an alternating magnetic field in an electromagnetic repulsion tray. The instantaneous eddy-current electromagnetic force generated by the repulsion tray is large, and the direct-drive design significantly reduces intermediate mechanism links and reduces the qualities of moving components, so that the action speed of the direct-current circuit breaker is effectively increased and the inherent opening time of the circuit breaker is greatly shortened. Besides, the repulsion tray has a compact structure and a small size, the spatial distribution of the circuit breaker is fully utilized and optimized to reduce the size of the circuit breaker.

Description

Technical field [0001] The invention relates to a quick trip device applied to a DC circuit breaker, in particular to a DC circuit breaker quick trip mechanism using the principle of a repulsive force plate. Background technique [0002] The direct current power supply system is more and more closely connected with people's daily life. At present, many important industries such as urban trolleybuses, subways, smelting, chemical industry, rolling materials, ship power, mining, etc. have adopted direct current power supply systems. Among them, the DC circuit breaker is a guarantee for the safe operation of the DC power supply system and has a protection function to reliably cut off the fault current of the DC loop. With the rapid economic development of our country and the gradual modernization of the industrial transportation sector, the requirements for the reliability of the power supply system are becoming more and more stringent, and the DC power load capacity continues to inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/24
Inventor 吴翊荣命哲杨芸杨飞陈胜马瑞光
Owner XI AN JIAOTONG UNIV
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