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Transformer insulation paper with high heatproof grade

A heat-resistant grade, transformer technology, applied in the field of transformers, to achieve the effect of improving heat resistance, improving aging resistance, and simple preparation method

Inactive Publication Date: 2016-02-24
TONGLING SANJIA TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using mica to modify insulating paper can obtain insulating paper with better performance, but there are few researches on this aspect at home and abroad.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0013] An insulating paper for transformers with high heat resistance, prepared from the following raw materials in parts by weight (kg): silane coupling agent kh5500.6, mica 6, glycine 1, silane coupling agent kh5700.3, emulsifier OP , sodium dodecylsulfonate 0.2, E44 epoxy resin 2, cerium stearate 0.3, pulp board 500, pectin fiber 3.4, antioxidant MB0.3, nano boron nitride 1.2, lead tungstate 0.3, deionized Appropriate amount of water.

[0014] The insulating paper for a transformer with a high heat-resistant grade is prepared by the following specific steps:

[0015] (1) Add the silane coupling agent kh550 into the solution with a mass ratio of ethanol to water of 1:1, heat it in a water bath to 35°C, add dropwise oxalic acid to adjust the pH value to 4, hydrolyze for 1 hour, and dip the mica sheet into Stir and soak in 75% ethanol for 1 h, then ultrasonically wash for 10 min, soak in deionized water for 0.5 h, and finally place in an oven to dry at 110°C for 2 h, grind fo...

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PUM

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Abstract

The invention discloses a transformer insulation paper with high heatproof grade. The transformer insulation paper is prepared from the following raw materials by weight part: 0.6-0.7 of a silane coupling agent kh550, 6-8 of mica, 1-1.5 of glycine, 0.3-0.4 of a silane coupling agent kh570, 0.1-0.2 of an emulsifier OP-10, 0.2-0.3 of sodium dodecyl sulfate, 2-3 of E44 epoxy resin, 0.3-0.5 of cerium stearate, and 500-550 of a pulp board, 3.4-4 of pectin fiber, 0.3-0.4 of an anti-aging agent MB, 1.2-1.6 of nano boron nitride, 0.3-0.5 of lead tungstate, and a proper amount of deionized water. The transformer insulation paper provided by the invention has the advantages of simple preparation method, wide raw materials, low production cost, high heatproof grade, and good stability, can be produced in large scale, and is worthy of promotion.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to insulating paper for transformers with high heat resistance. Background technique [0002] In recent years, with the rapid development of my country's electric power, electrical, electronics, home appliances and communications industries, people have higher and higher requirements for transformers. Cellulose insulating paper is one of the most widely used internal insulating materials in oil-immersed power transformers. Since it cannot be replaced during operation, its mechanical and insulating properties directly determine the service life of the transformer. In the actual transformer, the insulating paper is subjected to high-intensity electric field stress for a long time, and once a breakdown occurs, the transformer will fail. If the electrical performance of insulating paper can be improved, the usage of insulating paper can be saved, the working life of insulating pap...

Claims

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Application Information

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IPC IPC(8): D21H15/12D21H13/44D21H17/67D21H27/12H01B3/52H01F27/32
CPCD21H15/12D21H13/44D21H17/09D21H17/12D21H17/14D21H17/52D21H17/66D21H17/67D21H17/74D21H21/14D21H21/18D21H21/34H01B3/52H01F27/32
Inventor 李新满
Owner TONGLING SANJIA TRANSFORMER
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