Title :
Influence of discharges on breakdown of silicone oil-polyethylene composite insulation
Author :
Nagao, M. ; Jayaram, Shesha ; Sugio, M. ; Waldi, E.P.
Author_Institution :
Toyohashi Univ. of Technol., Japan
Abstract :
Breakdown strength and the discharge activities of silicone oil-polyethylene composite insulation under dc voltages have been studied using needle-plane electrode system with small gap distance of 0.5 or 2 mm. Higher breakdown voltages have been observed with LDPE film as a barrier for both polarities, although the effect was more significant under positive polarity. Continuous discharges under negative polarity are thought to be the cause for observed lower values of breakdown voltages compared to needle positive condition with composite insulation
Keywords :
discharges (electric); electric breakdown; insulating oils; polyethylene insulation; silicone insulation; 0.5 mm; 2.0 mm; LDPE film; breakdown; breakdown strength; composite insulation; dc voltages; discharge activities; discharges; needle positive conditions; needle-plane electrode system; negative polarity; polarities; silicone oil/polyethylene composite insulation; small gap distance; Breakdown voltage; Electric breakdown; Electrodes; Needles; Oil insulation; Partial discharge measurement; Petroleum; Plastic insulation; Polyethylene; Silicon;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-5414-1
DOI :
10.1109/CEIDP.1999.807891
