Title :
Influence of charges on spacer surface flashover in air and SF6
Author :
Rao, B. Nageshwar ; Dwarkamath, K. ; Siddagangappa, M.C.
Author_Institution :
Central Power Res. Inst., Bangalore, India
Abstract :
Cylindrical spacers of Polymethyl methacrylate, polytetra fluoroethylene, Epoxy and Nylon with a conducting particle on the surface have been subjected to lightning impulse voltages (1.2/50 μsec) under uniform electric field in air and under non-uniform electric field in SF6. The effect of lightning impulse voltage polarity, gas pressure, permittivity, charged source position on surface flashover of spacers and v-t characteristics are discussed Surface morphology of spacer after flashover events in air and SF6 are presented
Keywords :
SF6 insulation; air insulation; flashover; lightning; SF6; air; conducting particle; cylindrical spacer; electric field; epoxy; lightning impulse voltage; nylon; polymethyl methacrylate; polytetrafluroethylene; surface charge; surface flashover; surface morphology; Dielectrics; Electrodes; Flashover; Insulation; Lightning; Permittivity; Solids; Surface charging; Surface morphology; Voltage;
Conference_Titel :
Electrical Insulation, 1998. Conference Record of the 1998 IEEE International Symposium on
Conference_Location :
Arlington, VA
Print_ISBN :
0-7803-4927-X
DOI :
10.1109/ELINSL.1998.694882
