Title :
Retrofilling conditions of high voltage transformers
Author :
Fafana, I. ; Wasserberg, V. ; Borsi, H. ; Gockenbach, E.
Author_Institution :
Res. Group on Atmos. Icing, Que., Canada
Abstract :
This article reports the procedures and preliminary tests related to the retrofilling of a perchlorethylene-base d fluid (Transclene TM) filled transformer. Two insulating liquids, a mineral oil and an ester liquid that seemed to be suitable for this retrofilling, were investigated, In order to examine long-term effects, the investigations were performed on new samples as well as on samples subjected to severe ageing conditions. To simulate real operating conditions, the temperature was varied between O and 100 °C with different water contents.
Keywords :
ageing; power transformer insulation; power transformer testing; transformer oil; 0 to 100 degC; Transclene; ageing conditions; ester liquid; high voltage transformers; long-term effects; mineral oil; operating conditions; perchlorethylene-base d fluid; retrofilling conditions; water contents; Cleaning; Costs; Dielectric materials; Dielectrics and electrical insulation; Fires; Liquids; Oil insulation; Power transformer insulation; Power transformers; Resistance heating;
Journal_Title :
Electrical Insulation Magazine, IEEE
