Title :
Dielectric breakdown characteristics of clean oil
Author :
Kurita, H. ; Hasegawa, T. ; Kimura, K.
Author_Institution :
Mitsubishi Electr. Corp., Hyogo, Japan
Abstract :
The dielectric strength of highly filtered and dehydrated oil was investigated with AC and impulse voltages. The influence of particles on breakdown strength is discussed, taking into account the particle content factor. The scale effect of superclean oil, which was obtained from a modern cleaning system, is studied from a statistical viewpoint. The experimental result is interpreted using the weakest link theory. With this interpretation, the dependence of breakdown strength on stressed oil and electrode area are discussed. In the case of the impulse voltage, the dielectric strength was influenced by the stressed oil volume. In the case of the AC voltage, the dielectric strength depended on the electrode area effect
Keywords :
electric breakdown of liquids; electric strength; impulse testing; insulating oils; insulation testing; transformer insulation; AC voltage; breakdown strength; clean oil; dehydrated oil; dielectric strength; electrode area effect; highly filtered; impulse voltages; influence of particles; particle content factor; scale effect; superclean oil; weakest link theory; Circuit testing; Cleaning; Contamination; Counting circuits; Dielectric breakdown; Electric breakdown; Electrodes; Lubricating oils; Petroleum; Voltage;
Conference_Titel :
Electrical Insulation, Conference Record of the 1992 IEEE International Symposium on
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-0649-X
DOI :
10.1109/ELINSL.1992.246965
