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Degradation Of H.V. Generator Insulation Under Mechanical, Electrical And Thermal Stresses

Ramu, TS (1990) Degradation Of H.V. Generator Insulation Under Mechanical, Electrical And Thermal Stresses. In: Conference Record of the 1990 IEEE International Symposium on Electrical Insulation, 1990, 3-6 June, Toronto,Canada, pp. 21-24.


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The paper presents the results of ageing experiments under combined electrical, mechanical (vibration) and thermal stresses on epoxy bonded mica insulation. Actual 11 KV machine coils designed for use in 1 MW rotating machines are used as the specimens. Both diagnostic and destructive tests were carried out to assess the amount of ageing. It was observed that the incremental loss tangent and partial discharge energy per cycle increase monotonically with time of ageing and that the dielectric strength fell monotonically. Thus indicating a high degree of correlation between these properties.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 1990 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.
Department/Centre: Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Date Deposited: 30 May 2006
Last Modified: 19 Sep 2010 04:27
URI: http://eprints.iisc.ac.in/id/eprint/7078

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