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Insulation voltage equalizing ball used for super-high or extra-high voltage transformer and production process thereof

A manufacturing method and technology of equalizing balls, applied in the direction of transformer/inductor coil/winding/connection, coil manufacturing, etc., to achieve the effects of shortening insulation distance, prolonging working life, and improving the use of field strength

Active Publication Date: 2009-05-06
常州市英中电气有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it doesn't involve how to install insulators on the outer surface of the pressure equalizing ball

Method used

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  • Insulation voltage equalizing ball used for super-high or extra-high voltage transformer and production process thereof
  • Insulation voltage equalizing ball used for super-high or extra-high voltage transformer and production process thereof
  • Insulation voltage equalizing ball used for super-high or extra-high voltage transformer and production process thereof

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Embodiment Construction

[0017] See figure 1 and figure 2 , the insulating equalizing ball used for ultra-high voltage or ultra-high voltage transformers of the present invention has a pure insulating paper cover shell 6, a pure insulating paper stay 7, a pure insulating paper cylinder 8 and an equalizing ball 9.

[0018]The pressure equalizing ball 9 has a hollow metal sphere 91. The metal sphere 91 has two openings, one is the wire outlet and the other is the wire inlet. Shape, the pressure equalizing ball 9 also has a ring-shaped flange 92 made of metal, the flange 92 is located in the metal sphere 91 and fixed with the inner wall of the metal sphere 91 .

[0019] The pure insulating paper covering shell 6 is tightly covered on the outer wall of the metal sphere 91 , and the pure insulating paper cylinder 8 is sleeved outside the pure insulating paper covering shell 6 . There are 8 pure insulating paper stays 7 of the present embodiment. And each pure insulating paper stay 7 is arranged between...

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Abstract

The invention discloses an insulating equalizing ball for a super-high voltage or ultra-high voltage transformer and a method for manufacturing the insulating equalizing ball. The insulating equalizing ball comprises an equalizing ball, a pure insulation paper covering shell, pure insulation paper braces and a pure insulation paper cylinder body; the equalizing ball is provided with a hollow metal ball body and an annular flange plate; the pure insulation paper covering shell is tightly covered on the outer wall of the metal ball body, and the pure insulation paper cylinder body is sleeved outside the pure insulation paper covering shell; each pure insulation paper brace is arranged between the pure insulation paper covering shell and the pure insulation paper cylinder body; the inward end surface of each pure insulation paper brace is fixed with the pure insulation paper covering shell in a bonding way, and the outward end surface of the each pure insulation paper brace is fixed with the pure insulation paper cylinder body in a bonding way. The insulating equalizing ball increases the insulation used field strength of the transformers, shortens the insulation distance of the bushing outgoing line of the transformers, eliminates the hidden trouble of the partial discharge generated by the transformer product, improves the operation reliability of the transformer and prolongs the working life of the transformers.

Description

technical field [0001] The invention relates to a transformer insulating part, in particular to an insulating pressure equalizing ball used for an ultra-high voltage or extra-high voltage transformer and a manufacturing method thereof. Background technique [0002] The rated voltage of common extra-high voltage transformers is 350kV to 500kV, while the rated voltage of UHV transformers is 750kV and above. Due to the high working voltage of this type of transformer, the electric field distribution in some parts inside the transformer, such as the end of the bushing of the outgoing line, is extremely uneven, and it is often due to the local working field strength exceeding the insulating material (oil-impregnated paper insulation) itself. The phenomenon of corona discharge occurs due to the strong allowable field, which not only reduces the reliability of the transformer operation, but also shortens the working life of the transformer. For this reason, it is necessary to plac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/32H01F41/12
Inventor 俞英忠
Owner 常州市英中电气有限公司
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