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Published Article / I07/2007/I-002 ENY-ARTICLE-2008-184

Concentrated Discharges and Dry Bands on Polluted Outdoor Insulators

Chrzan, K L (Wroclaw University of Technology, Wroclaw, 50-370, Poland) ; Moro, F (Dipartimento di Ingegneria Elettrica, Università di Padova, Padova 35131, Italy)


Abstract: This paper describes concentrated discharges on polluted insulators in the laboratory and in the field. The authors have observed the concentrated discharges at the high-voltage laboratories in Stuttgart, Zittau, and Mannheim, Germany, and Wroclaw, Poland. The concentrated discharges were also documented under natural conditions. These discharges are very dangerous especially for high-voltage apparatus, bushings, and polymer insulators. It has been shown that due to uneven voltage distribution at very low surface conductivity, the concentrated discharges can ignite even under uniformly polluted and uniformly wetted insulators.

Keyword(s): leakage current ; pollution ; surface conductivity ; surface discharges
Note: IEEE Transactions on Power Delivery. 2007 vol. 22, nr 1, pp. 466-471

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Cited by: try citation search for ENY-ARTICLE-2008-184; I07/2007/I-002

Record created 2008-10-01, last modified 2008-10-01

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