Title :
Basic insulation characteristics of perfluorocarbon for large power transformers
Author :
Takagi, I. ; Higaki, M. ; Endoo, K. ; Shirone, T. ; Hiraishi, K. ; Kawashima, K.
Author_Institution :
Chubu Electr. Power Co. Inc., Nagoya, Japan
fDate :
10/1/1988 12:00:00 AM
Abstract :
To evaluate performance of nonflammable, high-voltage, large power transformers, the effects of pressure and dissolved SF6 gas on the AC and lightning impulse insulation characteristics of perfluorocarbon were studied. With currents of up to 300 A in the conductor of an intercoil insulation model, phenomena relating to SF6 gas bubble release from the conductor surface were studied. Relationships between the bubble release phenomena and the basic insulation characteristics of perfluorocarbon were determined
Keywords :
organic insulating materials; power transformers; transformer insulation; 300 A; SF6; bubble release phenomena; conductor surface; lightning impulse; perfluorocarbon insulation characteristics; power transformers; Conductors; Current transformers; Dielectric liquids; Electric breakdown; Electrodes; Lightning; Oil insulation; Power transformer insulation; Power transformers; Sulfur hexafluoride;
Journal_Title :
Power Delivery, IEEE Transactions on
