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Insulating paper for high overload transformers

A transformer, high overload technology, applied in insulators, insulators, organic insulators, etc., can solve the problems of heat resistance and breakdown voltage difference of polyester film, affecting service life, etc., and achieve the effect of good thermal stability

Active Publication Date: 2017-04-26
NANTONG RIZHI ELECTRIC STUFF CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyester film has poor heat resistance and breakdown voltage, which affects its service life

Method used

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  • Insulating paper for high overload transformers

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment provides the composition and preparation method of insulating paper for high overload transformers

[0031] The base paper of the insulating paper for high overload transformers is prepared from high-purity insulating wood pulp fibers by adding 3% melamine. It consists of 5 parts of glycerol ether resin, 5 parts of dicyandiamide, 2 parts of diaminodiphenyl sulfone, and 2 parts of accelerator.

Embodiment 2

[0033] The base paper of the insulating paper for high overload transformers is made of high-purity insulating wood pulp fibers by adding 2% dimethylamine. 10 parts of alcohol diglycidyl ether resin, 10 parts of dicyandiamide, 8 parts of diaminodiphenyl sulfone, and 6 parts of accelerator.

Embodiment 3

[0035] The base paper of the insulating paper for high overload transformers is prepared from high-purity insulating wood pulp fibers by adding 5% polyacrylamide. The adhesive layer is made of 70 parts of phenolic epoxy resin, 20 parts of flexible epoxy resin, and polyglycol It consists of 20 parts of diglycidyl ether resin, 20 parts of dicyandiamide, 10 parts of diaminodiphenyl sulfone and 8 parts of accelerator.

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Abstract

The invention discloses an insulation paper used for a high-overload transformer. The insulation paper comprises base paper and a cementing layer and is characterized in that the base paper consists of high-purity insulation wood pulp fibers, and the cementing layer consists of modified epoxy resin. The insulation paper used for the high-overload transformer has good thermostability, mechanical performance and electrical performance.

Description

technical field [0001] The present disclosure generally relates to the field of insulating paper, and particularly relates to insulating paper for high overload transformers. Background technique [0002] The high-overload oil-immersed transformer is a new type of voltage transformer developed by the State Grid Ministry of Agriculture and Electric Power and developed by the China Electric Power Research Institute. In terms of insulating materials, high-density dispensing paper was originally used. When the transformer load increases significantly, transformers are prone to appear. Overload burns, and there is a situation where the voltage is low. [0003] Later, some research institutes used the NOMEX paper produced by DuPont in the United States as the interlayer insulation, which was gradually eliminated due to the smooth surface of the material, the difficulty in manufacturing, the high production cost, the difficulty in recycling in the later stage, and it is not conduci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B17/60H01B3/42H01F27/32B32B27/36B32B27/38
CPCB32B27/36B32B27/38H01B3/421H01B17/60H01F27/32
Inventor 周顺奎任桂军闾传瑞
Owner NANTONG RIZHI ELECTRIC STUFF CO LTD