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Surface discharge and morphology characteristics of new formulated TPE materials under tracking test

Mohamed Piah, Mohamed Afendi and Darus, Ahmad and Hassan, Azman (2008) Surface discharge and morphology characteristics of new formulated TPE materials under tracking test. In: Dielectrics And Electrical Insulation. Penerbit UTM, Johor, pp. 17-34. ISBN 978-983-52-0646-7

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Official URL: http://www.penerbit.utm.my/bookchapterdoc/FKE/book...

Abstract

Surface discharge is a common electrical discharge phenomenon that occurs on the insulator surface under high voltage stress. This phenomenon, which is normally known as dry-band discharge, exists due to the flowing of leakage current (LC) under the presence of wet and contaminated conditions. When the insulator is wetted, a resistive surface LC flows, which is generally many orders of magnitude higher than the capacitive current in the case of dry insulators. This LC results in non-uniform heating of the contamination layer due to the nonuniform resistivity of the conducting film. The distribution of nonuniform current along the insulator surface eventually causes dryband to be formed where the surface LC density is highest. The whole voltage applied across the insulator appears across the high resistive dry-band and can result in breakdown of the air above the dry-band to create carbonised track.

Item Type:Book Section
Uncontrolled Keywords:morphology, electrical
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:27733
Deposited By: Fazli Masari
Deposited On:02 Aug 2012 00:39
Last Modified:02 Aug 2012 00:39

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