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Rapid multi-gap vacuum disconnector

A vacuum isolation and multi-gap technology, applied in electric switches, high-voltage/high-current switches, high-voltage air circuit breakers, etc., to achieve the effects of enhancing mechanical strength and reliability, improving voltage tolerance, and improving high-voltage tolerance

Inactive Publication Date: 2014-07-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 5) The quick switch involved in the present invention adopts bellows for movable and airtight connection, which is not involved in the existing isolating switch design

Method used

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] Such as figure 1 As shown, when the range of the contact gap distance (that is, the vacuum gap) changes, the insulation characteristics of the vacuum gap will also change, and it does not change linearly with the change of the contact gap distance. When the vacuum gap distance d is about in the range of d≤2mm, its breakdown voltage U B As the vacuum gap d increases, it can basically be regarded as a linear change; when the vacuum gap distance increases to d≥2mm, the insulation characteristics of the vacuum gap enter the saturation region, and the breakdown voltage U B The increase slows down with the increase of the vacuum gap d.

[0037] Such as figure 2 As shown, a fast multi-gap vacuum isolating switch of the present invention includes a cavity 120, a main electrode 101 and a secondary electrode 121 extending into the ca...

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Abstract

Provided is a rapid multi-gap vacuum disconnector. The rapid multi-gap vacuum disconnector comprises an electrode structure, current-carrying contacts, a metal carrier structure, a driver, an insulating driving pull rod structure and a vacuum cavity, wherein the electrode structure comprises a movable main electrode connected with a corrugated pipe and a fixed auxiliary electrode, the insulating driving pull rod structure comprises contact carrier fixing sealing plates to which current-carrying contact metal carriers are fixed, corrugated pipes and an insulating driving pull rod, the corrugated pipes and the insulating driving pull rod are connected with the contact carrier fixing sealing plates, the current-carrying contacts are installed on the current-carrying contact metal carriers respectively, and working modes are switched through the insulating driving pull rods; the insulating driving pull rods drive the current-carrying contacts to shift through the contact carrier fixing sealing plates and the current-carrying contact metal carriers connected with the contact carrier fixing sealing plates, so that a circuit is formed by the main electrode, the auxiliary electrode and the current-carrying contacts when the rapid multi-gap vacuum disconnector is in the current-carrying working state; multi-gap vacuum insulation is formed by the main electrode, the auxiliary electrode and the current-carrying contacts when the rapid multi-gap vacuum disconnector in the isolation working state. According to the rapid multi-gap vacuum disconnector, application of multi-gap vacuum insulation in the rapid disconnector is achieved, and the high-voltage resistance capacity of the rapid multi-gap vacuum disconnector is improved.

Description

technical field [0001] The invention belongs to the technical field of DC breaking, and in particular relates to a medium and high voltage fast multi-gap vacuum isolating switch. Background technique [0002] DC transmission technology has unique technical advantages in the field of large-capacity and long-distance power transmission and distribution. However, the lack of available high-voltage DC circuit breakers has greatly limited and restricted the development of DC transmission technology. Since the impedance of the DC system is very low, when a short-circuit current fault occurs, the rate of rise of the short-circuit current is very high. Therefore, it is necessary to require the DC circuit breaker to be able to reliably cut off the short-circuit fault in a short time. At present, in the DC circuit breakers of various topological structures researched at home and abroad, medium and high voltage fast disconnectors are already indispensable devices. [0003] With the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/66H01H33/664H01H33/666
Inventor 刘志远马慧王建华耿英三李世民
Owner XI AN JIAOTONG UNIV
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