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On-load tap changer

An on-load tap and switch technology, which is used in electrical switches, accessories of scaffolding, housing structure support, etc., can solve the problem of high cost and achieve the effect of high electrical isolation

Active Publication Date: 2013-02-27
MASCHFAB REINHAUSEN GEBR SCHEUBECK GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An asymmetrical circuit is generally easier to operate electrically, but has the disadvantage that its mechanical switching requires very costly structural solutions

Method used

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Examples

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Embodiment Construction

[0018] figure 1 The on-load diverter switch of the on-load tap changer according to the invention is shown in detail. In this context, the invention is subsequently explained and described by way of example on the basis of an exemplary embodiment with a vacuum interrupter. The selector of the on-load tap changer is not shown, which selects the new winding tap, here n+1, which is to be switched without power before the actual on-load switching. On-load diverter switches—as known from the prior art—have two load branches A and B, which are each electrically connected to a winding tap n or n+1. The on-load tap-changer according to the invention has a main current branch and an auxiliary current branch in each load branch.

[0019] The first main current branch establishes the electrical connection from 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...

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Abstract

The present invention relates to an on-load tap changer for switching among winding taps of a step transformer without interruption. The general inventive concept lies in connecting a first winding tap of a first main current branch to a load tap line by means of a series circuit, which comprises a first mechanical change-over switch and a first switching element, in other words a vacuum switching tube or alternatively a semiconductor component, and in a design that is analogously symmetrical thereto, connecting a second winding tap of a second main current branch to the load tap line by means of a series circuit, which comprises a second mechanical change-over switch and a second switching element, in other words a second vacuum switching tube or alternatively a second semiconductor component, and branching off a first auxiliary current branch, which has a looped-in resistor, between the first winding tap and the first mechanical change-over switch, wherein by means of said first auxiliary current branch an electrical connection to the second mechanical change-over switch of the second main current path can be established, and branching off a second auxiliary current branch, which has a further looped-in resistor, between the second winding tap and the second mechanical change-over switch, wherein by means of said second auxiliary current branch an electrical connection to the first mechanical change-over switch of the first main current path can be established.

Description

technical field [0001] The invention relates to an on-load tap changer for uninterrupted switching between winding taps of a tapped transformer. Background technique [0002] For many years, tap-changers have been used in large numbers all over the world for the uninterrupted switching between different winding taps of tapped transformers. Such a tap changer usually comprises a selector for powerlessly selecting the corresponding winding tap of the tap changer to which it should be switched and an on-load switch for actually switching from the past winding tap to the new preselected winding tap. toggle switch. For this purpose, diverter switches usually have switching contacts and resistive contacts. The switch contacts are used here for the direct connection of the respective winding tap to the load lead, while the resistor contacts are used for short-term switching, ie bridging by means of one or more switching resistors. However, recent developments have deviated from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F29/04H01H9/00
CPCH01H9/0038H01F29/04E02D29/0208E04G3/20E04G5/04E04G5/046E04G5/06E04G5/062H02P13/06
Inventor W·阿尔布雷希特C·哈默A·萨克森豪泽
Owner MASCHFAB REINHAUSEN GEBR SCHEUBECK GMBH & CO KG
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