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Step switch comprising a polarity switch for a variable transformer

A technology of tap changer and polarization switch, applied in variable transformers, transformers, variable inductors, etc., can solve problems such as undesired gas troubles, and achieve the effect of small arc generation

Active Publication Date: 2012-09-12
MASCHFAB REINHAUSEN GEBR SCHEUBECK GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This undesired gas becomes more and more troublesome as the system voltage increases

Method used

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  • Step switch comprising a polarity switch for a variable transformer
  • Step switch comprising a polarity switch for a variable transformer
  • Step switch comprising a polarity switch for a variable transformer

Examples

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Embodiment Construction

[0017] Firstly, the known prior art of the polarizing device needs to be described again with reference to FIG. 1 . The main winding 1 and the tap winding 2 of the tapped transformer are shown. A tap changer with a selector 3 is connected to the tap winding 2 . Before the changeover, the selector 3 first preselects the new winding tap of the tapped winding 2 to be changed over, without power. This changeover itself takes place via the known load changeover switch 4 of the tap changer, which is not described in detail here. Furthermore, the tap changer has a preselector 5 via which the start or end of the tap winding 2 can be switched to the end of the main winding 1 in order to increase the adjustment range. The basic polarization circuit consists of a polarization resistor 7 attached to the midpoint 6 of the tapped winding 2, which is directly connected to the load lead 9 or, as shown here, only temporarily connected to the load via a polarization switch 8. Lead 9 is conne...

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PUM

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Abstract

The invention relates to a step switch provided with a preselector and a polarity circuit, a separate polarisation resistance being respectively provided at the beginning and the end of the stepped winding. Optionally, the two polarisation resistances can be connected continuously or via separate polarity switches.

Description

technical field [0001] The invention relates to a tap changer equipped with a preselector and having a polarization circuit for uninterrupted adjustment on a variable transformer. Background technique [0002] DE 19 42 567 A describes a tap changer with a preselector for selectively connecting the stages of a tap winding in series to form an associated main winding of a tap transformer, wherein the changeover contacts of the tap changer Formed as changeover contacts. In such a tap changer, the tap winding of the corresponding tap transformer is temporarily electrically separated from the main winding when the preselector is actuated. At this point, the tapped winding is at a potential generated by the voltage of the adjacent winding and the coupling capacitance with respect to this winding or to ground. The resulting voltage difference loads the switching path of the open preselector contact and can lead to impermissible electrical discharges at the preselector. To avoid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F29/04
CPCH01F29/04H01H9/0005H01H33/16
Inventor A·克雷默D·沈
Owner MASCHFAB REINHAUSEN GEBR SCHEUBECK GMBH & CO KG
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