On-load tapping switch of composite switching-type transformer

A switch and on-load tap technology, which is applied in the field of transformers, can solve the problems of limiting the application of vacuum tap changers and the limited electrical life of vacuum switches, and achieves the effects of simple structure, reliable operation, and arc-free switching

Inactive Publication Date: 2011-10-05
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although compared with the electromechanical hybrid switch, the drag mechanism is removed, but the electrical life of the vacuum switch is still limited, which limits the application of the vacuum tap changer

Method used

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  • On-load tapping switch of composite switching-type transformer
  • On-load tapping switch of composite switching-type transformer
  • On-load tapping switch of composite switching-type transformer

Examples

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Embodiment Construction

[0030] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] Such as figure 1 As shown, it is a schematic structural diagram of a transformer on-load tap changer according to an embodiment of the present invention, which includes a plurality of odd-numbered taps J1, J3, etc., a plurality of even-numbered taps J2, J4, etc. A compound switch S1, a second compound switch S2, a first tap selector and a second tap selector, a plurality of static contacts of the first tap selector are respectively connected to odd-numbered taps J1, J3, etc., the first tap selector The moving contact R1 of the selector is connected to one end of the first composite switch S1, the other end of the first composite switch S1 is connected to the outlet...

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PUM

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Abstract

The invention discloses an on-load tapping switch of a composite switching-type transformer; the on-load tapping switch comprises a plurality of odd taps, a plurality of even taps and an outgoing line terminal, wherein the plurality of odd taps, the plurality of even taps and the outgoing line terminal are connected with a winding of the transformer; the on-load tapping switch is characterized by also comprising a first combination switch and a second combination switch, a first tapping selector and a second tapping selector, wherein a plurality of fixed contacts of the first tapping selector are respectively connected with the plurality of odd taps; a moving contact of the first tapping selector is connected with one end of the first combination switch; a plurality of fixed contacts of the second tapping selector are respectively connected with the plurality of even taps; a moving contact of the second tapping selector are connected with one end of the second combination switch; and the other ends of the first combination switch and the second combination switch are connected with the outgoing line terminal. The on-load tapping switch realizes the commutation without arcing by using the combination switches and the trigger sequential control on the combination switches and has a simple structure and is reliable in work.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a composite switch type transformer on-load tap changer. Background technique [0002] In the prior art, due to changes in the primary side voltage (grid voltage) and load size and nature of the operating transmission and distribution transformer, the secondary side voltage may have a large change. In order to maintain the load voltage within the specified range (±5% UN) and ensure the normal needs of electrical equipment, the voltage of the transmission and distribution transformer must be adjusted. [0003] The basic principle of transformer on-load voltage regulation is to draw several taps from the coil on one side of the transformer (usually the high-voltage side), and switch from one tap to Another tap is used to change the effective number of turns to adjust the voltage. The on-load tap changer is composed of two parts, one part is the transformer body, which is different fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F29/04H01H1/56
Inventor 杜海江
Owner CHINA AGRI UNIV
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