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Vacuum arc-extinguishing chamber of vacuum circuit breaker

A vacuum interrupter and vacuum circuit breaker technology, which is applied to high-voltage air circuit breakers, circuits, electrical components, etc., can solve the problems of easy heating of current, affecting fatigue strength, and arc burnout of bellows, etc.

Inactive Publication Date: 2016-09-28
台州西普电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bellows are easy to be passive, and the arc generated when the static contact is broken; and the excessive current is easy to generate heat through the moving conductive rod, which is transmitted to the surface of the bellows through the thermal effect. degree will affect its fatigue strength

Method used

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  • Vacuum arc-extinguishing chamber of vacuum circuit breaker
  • Vacuum arc-extinguishing chamber of vacuum circuit breaker

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Embodiment Construction

[0010] As shown in the figure, a vacuum interrupter of a vacuum circuit breaker includes an insulating case 4, a moving contact 3, a static contact 2, a moving conductive rod 5, a static conductive rod 1, a moving end cover plate 9 and a bellows 8. One end of the bellows 8 is set on the movable conductive rod 5, and the other end is fixed on the movable end cover plate 9; the dynamic and static contacts are respectively arranged on the dynamic and static conductive rods, and the dynamic and static conductive rods are arranged oppositely; the movable end cover plate 9 is connected with the insulating case 4 . A ceramic heat insulation layer 6 is provided at the joint between the bellows 8 and the movable conductive rod 5, and the lower end of the ceramic heat insulation layer 6 is provided with a radially wavy cylindrical graphite nylon shielding net 7, and the other end of the shielding net 7 is connected to the moving end. The cover plate 9 is connected. The ceramic heat ins...

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Abstract

The invention discloses a vacuum interrupter of a vacuum circuit breaker, which comprises a movable conductive rod, a movable end cover plate and a bellows, one end of the bellows is sleeved on the movable conductive rod, and the other end is fixed on the movable end cover plate; the bellows and the moving conductive rod are provided with a heat insulation layer, the lower end of the heat insulation layer is provided with an elastic shielding net, and the other end of the elastic shielding net is connected with the moving end cover plate. Adopting this structure can effectively avoid the arc generated when the dynamic and static contacts are broken and burn the corrugated tube, and can also isolate the surface of the corrugated tube from being heated, thereby improving the service life of the corrugated tube and the vacuum interrupter.

Description

technical field [0001] The invention relates to a vacuum interrupter of a vacuum circuit breaker. Background technique [0002] Vacuum high-voltage circuit breaker is one of the most important equipment in the power system, mainly including insulating shell, dynamic and static contacts, vacuum interrupter, operating mechanism, etc. Because of its advantages of small size, light weight, suitable for frequent operation, and no maintenance for arc extinguishing, its operating status directly determines the safety and efficiency of the power system. The vacuum degree of the vacuum circuit breaker will gradually decrease during operation, and when the vacuum leaks to a certain extent, it will cause safety hazards. Among them, the bellows in the vacuum interrupter is mainly responsible for ensuring the movement of the electric pole within a certain range and maintaining the high-pressure vacuum in the interrupter for a long time, and ensuring that the vacuum interrupter has a hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/664
CPCH01H33/664
Inventor 卓亦民叶海权黄建文
Owner 台州西普电气有限公司
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