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Published Article / ISBN 978-0-620-44584-9 ENY-ARTICLE-2009-278

Effect of impulse polarity on the flashover voltage of polluted cap and pin insulators

Chrzan, K L (Wroclaw University of Technology, Poland) ; Schwarz, H (Brandenburg University of Technology,Germany) ; Haeusler, H (Brandenburg University of Technology, Germany)


Abstract: The lightning impulse flashover voltage on clean and polluted cap and pin insulators under high humidity conditions were measured. It was shown that the negative flashover voltage of non-uniformly polluted insulators is about 15% lower than the positive one. Bigger difference of over 25% was found on a model insulator. The electrical strength of disc insulators lightly polluted on the upper part of the shed and heavily polluted under shed can be twice lower than that of clean insulators.

Keyword(s): flashover ; lightning ; pollution
Note: Proceedings of the 16th International Symposium on High Voltage Engineering, Copyright (c) 2009 SAIEE, Innes House, Johannesburg

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Record created 2009-12-10, last modified 2009-12-10

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