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Discharge Mechanism in Voids at Sub-Atmospheric Pressures

Ramachandra, B and Nema, RS (1998) Discharge Mechanism in Voids at Sub-Atmospheric Pressures. In: Conference Record of the 1998 IEEE International Symposium on Electrical Insulation, 1998, 7-10 June, Arlington,USA, Vol.1, 165-168.


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The physical processes occurring during partial discharges (PD) in voids in solid dielectrics are complicated due to the lack of knowledge of void shape, location and gas pressure. Fast oscilloscopic techniques are needed to measure the build up and decay of current as a function of time for single discharges. The purpose of the present work is to investigate the mechanism of the discharge in artificial voids in thin polypropylene (PP) films at different sub-atmospheric pressures. Efforts have been made in this work to distinguish Townsend-like and streamer-like discharges on the basis of the discharge pulses recorded in terms of rise time, pulse width and peak current for the various void dimensions and pressures studied.

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: 10 Apr 2006
Last Modified: 19 Sep 2010 04:25
URI: http://eprints.iisc.ac.in/id/eprint/6186

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