DocumentCode :
2557711
Title :
Experimental investigation of particle-initiated surface flashover in air and N2 in uniform gap under 60 Hz voltage
Author :
Wang, H.T. ; van Heeswijk, R.G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
fYear :
1990
fDate :
3-6 Jun 1990
Firstpage :
244
Lastpage :
247
Abstract :
The authors report an experimental investigation of the prebreakdown current and flashover characteristics of discharges initiated by a wire particle attached to an epoxy resin spacer in air of atmospheric pressure and N2 at a pressure ranging from 50 to 500 kPa under a 60-Hz voltage. It is shown that the particle-initiated surface flashover is strongly influenced by the prebreakdown process, which is quite different from that in the absence of a spacer. The presence of the spacer not only changes the discharge form, but also modifies the polarity effect. The flashover voltage is dependent on factors such as particle size, its location on the spacer, the surface charging process, and gas pressure. The flashover voltage is strongly influenced by the particle location on the spacer. The surface contamination of the spacer plays a crucial rule at higher pressure
Keywords :
air; electric breakdown of gases; electric strength; flashover; gaseous insulation; nitrogen; surface discharges; 50 to 500 kPa; 60 Hz; 60 Hz voltage; N2; air; discharge form; epoxy resin spacer; experimental investigation; flashover characteristics; flashover voltage; gas pressure; particle location; particle on spacer; particle size; particle-initiated surface flashover; polarity effects modification; prebreakdown current; prebreakdown process; surface charging process; surface contamination; uniform gap; wire particle; Current measurement; Dielectrics and electrical insulation; Electrodes; Epoxy resins; Fault location; Flashover; Surface contamination; Surface discharges; Voltage; Wire;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation, 1990., Conference Record of the 1990 IEEE International Symposium on
Conference_Location :
Toronto, Ont.
ISSN :
1089-084X
Type :
conf
DOI :
10.1109/ELINSL.1990.109749
Filename :
109749
Link To Document :
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