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Surface current on insulating spacers

Siddagangappa, MC and Rao, BN (1994) Surface current on insulating spacers. In: Gaseous Dielectrics VII. Proceedings of the Seventh International Symposium, 24-28 April 1994, Knoxville, TN, USA, pp. 643-648.

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Abstract

A composite solid-gas insulating system is an integral part of high voltage equipment. Solid insulators are used as mechanical support and to offer electrical insulation. There have been several research investigations with primary emphasis on the understanding of initiation of charges followed by discharge development leading to surface flashover on solid dielectrics in high pressure and in high vacuum systems. The present work reports on investigations relating to AC current flow on the dielectric surface under normal high voltage system operating conditions. The surface currents exhibited hysteresis (charge retention) characteristics with variation in the magnitudes of AC applied voltages both at atmospheric pressure and at low pressure conditions. The surface currents are observed to be not just limited by the surface resistivity of the spacer, but are also influenced by the encompassed gaseous environment

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Plenum.
Keywords: electric charge;flashover;insulator testing;power apparatus; surface charging'surface discharges
Department/Centre: Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Date Deposited: 08 Oct 2007
Last Modified: 11 Jan 2012 09:56
URI: http://eprints.iisc.ernet.in/id/eprint/11037

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