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Temperature Distribution in Resin Impregnated Paper Insulation for Transformer Bushings

Jyothi, NS and Ramu, TS and Mandlik, Manoj (2010) Temperature Distribution in Resin Impregnated Paper Insulation for Transformer Bushings. In: IEEE Transactions on Dielectrics and Electrical Insulation, 17 (3). pp. 931-938.

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Abstract

The overall reliability of a power transformer depends to a great extent on the sound operation of the bushings thereof. Oil impregnated paper (OIP) insulated bushings have been in use for a long time now. In many situations, it becomes necessary to avoid OIP insulation in bushings. In the recent past, a new technological breakthrough has been achieved whereby the OIP is replaced by epoxy resin impregnated crepe paper (RIP) insulation. This new system has several advantages over OIP and has now become the insulation of choice. However, its long time thermal and electrical performance need to be carefully assessed. This paper reports the results of a study of temperature distribution in the body of insulation, based on the ac conductivity of RIP insulation. A method of computing the maximum thermal voltage of this system is also given.

Item Type: Journal Article
Additional Information: Copyright 2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Boundary value problems; conductivity measurement; dielectric thermal factors; epoxy resin impregnated insulation; EHV insulation.
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 11 Oct 2010 07:06
Last Modified: 11 Oct 2010 07:06
URI: http://eprints.iisc.ernet.in/id/eprint/33143

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