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Electric insulation material, an electric device and a method for producing an electric insulation material

A technology of electrical insulating materials and filler particles, which is applied in the direction of organic insulators, inorganic insulators, plastic/resin/wax insulators, etc., and can solve the problems of peeling and destructive electrical insulating materials

Inactive Publication Date: 2008-05-28
ABB RES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This harsh condition, combined with poor wettability and a mismatch in coefficient of thermal expansion between the epoxy and other materials, can also lead to debonding of the electrical insulation, which in turn can lead to damaging partial discharges

Method used

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  • Electric insulation material, an electric device and a method for producing an electric insulation material
  • Electric insulation material, an electric device and a method for producing an electric insulation material
  • Electric insulation material, an electric device and a method for producing an electric insulation material

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Embodiment Construction

[0031] Figure 1 is a graph showing 50nm Al dispersed in an impregnation medium in the form of epoxy resin 2 2 o 3 TEM micrograph of Nanoparticle 1. Such an impregnation medium 2 comprising filler particles 1 can be produced simply by combining and mixing the particles 1 and the impregnation medium 2, preferably at room temperature or by conventional melt mixing. Surface modification of the Al with (3-glyceroxypropyl)trimethoxysilane 2 o 3 nanoparticles 1, and deagglomerated before introducing them into the epoxy resin 2. It has been found that with the present invention having 25 volume % 300nmAl 2 o 3 The insulation material of the impregnation medium with filler content replaces its conventional electrical insulation material, which can increase the radial thermal conductivity of the RIP sleeve by 150%.

[0032]Figure 2a shows an electrical insulation material 3 formed by several layers of a porous cellulose matrix 4 impregnated with an impregnation medium 2 comprising...

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Abstract

The invention relates to an electric insulation material (3) formed by a porous fibrous matrix that is impregnated with an impregnation medium (2) containing filler particles (1) having higher thermal conductivity than the impregnation medium and having at least one dimension smaller than 1m, preferably having at least one dimension smaller than 100 nm, the fibrous matrix (4) being at least partly penetrated by such filler particles (1) of the impregnation medium (2).

Description

technical field [0001] The present invention relates to electrical insulating materials formed from a fibrous matrix impregnated with an impregnating medium. The invention also relates to electrical bushings, motor windings and electrical equipment comprising such materials, as well as methods of producing said materials. Background technique [0002] Epoxy resins are widely used in the electrical industry for electrical insulation purposes in equipment such as surge arresters, high voltage circuit breakers and transformers. However, the thermal conductivity of epoxy resins is relatively low, which increases the risk of thermal problems and overheating in certain applications using electrical insulation materials comprising epoxy resins. Resin impregnated paper (RIP-) electrical bushings are often used in electrical systems for transforming and switching AC or DC voltages from hundreds of volts to thousands of volts. Electrical bushings for this application are relatively ...

Claims

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Application Information

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IPC IPC(8): H01B3/48H01B3/30H01B3/08
CPCH01B3/48
Inventor 安德斯·比约克隆德汉斯－阿克·埃里克森亨利克·希尔堡奥洛夫·约特斯坦彼得·伊斯贝里埃里克·约翰松埃瓦·马滕松延斯·罗克斯本特·罗思曼彼得·舍贝里罗伯特·斯塔尔文森特·蒂利埃特托比亚斯·维克斯特伦卡里纳·恩内比
Owner ABB RES LTD
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