Retrofilling conditions of high voltage transformers

Author

Fafana, I. ; Wasserberg, V. ; Borsi, H. ; Gockenbach, E.

Author_Institution

Res. Group on Atmos. Icing, Que., Canada

Volume

17

Issue

2

fYear

2001

Firstpage

17

Lastpage

30

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;

fLanguage

English

Journal_Title

Electrical Insulation Magazine, IEEE

Publisher

ieee

ISSN

0883-7554

Type

jour

DOI

10.1109/57.917528

Filename

917528