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Tap changer having vacuum interrupters

A vacuum switch tube, vacuum switch technology, applied in electrical switches, high-voltage/high-current switches, high-voltage air circuit breakers, etc., can solve the problems of installation space requirements and high mechanical complexity, and achieve the effect of permanent dielectric strength

Active Publication Date: 2013-09-04
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] All tap changers known from the prior art require multiple vacuum interrupters and additional mechanical switching mechanisms per phase, due to the high installation space requirements of the individual switching mechanisms and the associated structural and mechanical complexity but disadvantageous and especially expensive

Method used

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  • Tap changer having vacuum interrupters
  • Tap changer having vacuum interrupters
  • Tap changer having vacuum interrupters

Examples

Experimental program
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Embodiment Construction

[0026] figure 1 A tap changer known in the prior art is shown. The selector of the tap changer is not shown, which idly selects the new winding tap to be switched to, here n+1, before the actual load switching. The load changeover switch has two load branches A and B, which are electrically connected to winding taps n and n+1, respectively. The tap changer has a main current branch and an auxiliary current branch in each load branch.

[0027] The first main current branch electrically connects the winding tap n to the load lead LA via a mechanical selector switch U1 and a vacuum interrupter V1 connected in series therewith. In a similarly symmetrical construction, the second main current branch also electrically connects the winding tap n to the load lead LA via a series-connected mechanical selector switch U2 and a vacuum interrupter V2 .

[0028] Between the winding tap n of the first main current branch and the mechanical selector switch U1 a first auxiliary current bran...

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PUM

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Abstract

The invention relates to a tap changer having vacuum interrupters for switching over between winding taps of a tapped transformer without interruption. The tap changer according to the invention having vacuum interrupters is based on the general idea of combining the functionalities of at least one conventional vacuum switching contact which switches under load and a further mechanical switching means according to the prior art in just one single vacuum interrupter with two separately moving contact systems.

Description

technical field [0001] The invention relates to a tap changer with a vacuum interrupter for uninterrupted switching between winding taps of a tapped transformer. Background technique [0002] DE 2021575 discloses a tap changer with a total of four vacuum interrupters per phase. In each of the two load branches there is respectively arranged a vacuum switching tube as main contact and another vacuum switching tube connected in series with the switching resistor as resistance contact. [0003] For uninterrupted load switching from the current winding tap n to the new preselected winding tap n+1, first the main contact on the cut-off side is opened and then the resistance contact on the receiving side is closed so that the A compensation current flows between the two stages n and n+1. [0004] After opening the hitherto closed resistance contact on the disconnecting side, the main contact on the receiving side is closed, so that all the load current flows from the new winding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/00H01H33/16H01H33/664H01H33/662
CPCH01F29/04H01H9/0027H01H9/0038H01H33/16H01H33/66207H01H33/6647H02P13/06H01H9/00H01H33/662H01H33/664
Inventor W·阿尔布雷希特C·哈默C·海嫩R·弗罗切尔C·科茨A·萨克森豪泽C·皮尔切尔W·哈尔特曼S·科塞A·拉沃尔R·伦兹A·斯特泽尔J·泰克曼N·温策尔
Owner SIEMENS AG