On-load tapping switch of tandem type composite change-over switch transformer

A technology of changeover switch and on-load tap changer, which is applied in the field of transformers, can solve the problems of limited application of vacuum tap changer, limited electrical life of vacuum switch, difficulty in arcless transition, etc., and achieves simple structure, reliable operation, and realization of no The effect of arc switching
CN102226969BInactive Publication Date: 2012-07-18CHINA AGRI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA AGRI UNIV
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the field of transformers and discloses an on-load tapping switch of a tandem type composite change-over switch of a transformer. The on-load tapping switch comprises odd taps, even taps, an outgoing terminal, a first composite switch, a second composite 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 odd taps; a moving contact of the first tapping selector is connected with one end of the first composite switch; a plurality of fixed contacts of the second tapping selector are respectively connected with the even taps; a moving contact of the second tapping selector is connected with one end of the second composite switch; and the other end of the first composite switch and the other end of the second composite switch are connected with the outgoing terminal. In the on-load tapping switch, the composite switches are used and the trigger time sequence of the composite switches is controlled, so that the non-arc switching of the on-load tapping switch can be realized; and the on-load tapping switch is simple in structure and reliable in work.
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Description

technical field

[0001] The invention relates to the field of transformers, in particular to an on-load tap changer of a series compound switching switch of a transformer. 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, ...

Claims

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