Title :
Influence of an insulating film on the breakdown voltage of transformer oil in nonuniform fields
Author :
Evangelou, C.A. ; Zaky, A.A. ; Megahed, I.Y.
Author_Institution :
Alexandria University, Department of Electrical Engineering, Faculty of Engineering, Alexandria, Egypt
fDate :
2/1/1975 12:00:00 AM
Abstract :
The breakdown voltage of air-saturated transformer oil has been measured as a function of gap settings between a point and an aluminium-sphere electrode. By using a sufficient range of gap settings, it is shown that the presence of an electrolytically formed anodic oxide film on the spherical electrode markedly affects the polarity dependence of breakdown-voltage/gap-length characteristics.
Keywords :
electric breakdown of liquids; insulating oils; insulating thin films; transformer insulation; breakdown voltage; insulating film; nonuniform fields; transformer oil;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1975.0054
