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Double-fracture vacuum switch for gas-insulated switchgear

A vacuum switch and double-break technology, which is applied in the direction of electric switch, high-voltage air circuit breaker, high-voltage/high-current switch, etc., can solve the problems of partial discharge and poor heat dissipation, so as to solve the problem of partial discharge, save installation space, The effect of compact switchgear

Pending Publication Date: 2020-02-18
麦克奥迪(厦门)智能电气有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0007] The purpose of the present invention is to provide a double-break vacuum switch for an inflatable cabinet, which aims to solve the problems of partial discharge and poor heat dissipation in the prior art.

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  • Double-fracture vacuum switch for gas-insulated switchgear

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Embodiment Construction

[0023] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Such as figure 1 As shown, a double-break vacuum switch for an inflatable cabinet provided by the present invention includes: an upper outlet terminal 1, an insulating casing 2, a first vacuum interrupter 3, an intermediate conductor 4, a first soft connection 5, a first shielding Cover 6, first pull rod 7, first capacitor group 8, second capacitor group 9, second vacuum interrupter 10, lower outlet terminal 11, second soft connection 12, second shielding cover 13, second pull rod 14, The first cooling hole 15 and the second cooling hole 16 .

[0025] Specifically, such as figure 1 The upper inlet end 1 of the double-break vacuum switch shown in the inflatable cabinet is connected to the static end of the first vacuum interrupter 3,...

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Abstract

The invention discloses a double-fracture vacuum switch for gas-insulated switchgear. An upper inlet wire end is connected to the static end of a first vacuum arc-extinguishing chamber. The first vacuum arc-extinguishing chamber is fixed to an intermediate conductor. The moving end of the first vacuum arc-extinguishing chamber is connected with the intermediate conductor through a first flexible connection. The other end of the intermediate conductor is connected in series with the static end of a second vacuum arc-extinguishing chamber. The second vacuum arc-extinguishing chamber is fixed toa lower outlet wire end. The moving end of the second vacuum arc-extinguishing chamber is connected to the lower outlet wire end through a second flexible connection. The double-fracture vacuum switcheffectively solves the high reignition rate of a switching capacitor bank, effectively solves the partial discharge caused by the high field strength of a pull rod or the tip discharge of the flexible connections, contributes to the miniaturization of a product, makes the switchgear more compact, saves an installation space, and helps to reduce cost and improve the heat dissipation performance ofthe product.

Description

technical field [0001] The invention relates to the field of design and manufacture of medium and high voltage switchgear, in particular to a double-break vacuum switch for an inflatable cabinet, which is used to limit inrush current and solve the problem of re-ignition of switching and switching capacitors in a gas-filled cabinet. Background technique [0002] At present, vacuum switches are usually used to switch capacitor banks when performing reactive power compensation in power systems. When closing capacitor banks, high-amplitude inrush currents and overvoltages often occur, especially when back-to-back capacitor banks are closed. up to 100 times the rated current. Not only is it unfavorable to the equipment in the system, but it may also cause malfunction of relay protection and affect the stability of power system operation. [0003] The problems that are prone to occur in switching capacitor banks of vacuum circuit breakers mainly include closing inrush current, re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/662H01H33/664H01H9/52
CPCH01H9/52H01H33/66207H01H33/664
Inventor 王振良陈雪如黄德才张建宏
Owner 麦克奥迪(厦门)智能电气有限公司
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