Influence of ageing on the dielectric properties of carbonized transformer oil

Author

Krins, M. ; Borsi, H. ; Gockenbach, E.

Author_Institution

Schering Inst. of High Voltage Tech. & Eng., Hannover Univ., Germany

Volume

2

fYear

1996

fDate

16-19 Jun 1996

Firstpage

546

Abstract

The paper reports experimental investigations dealing with the influence of ageing processes on the dielectric dissipation factor, the volume resistivity and the partial discharge inception voltage of carbonized mineral-based transformer oil. The oil was carbonized by stressing it with a defined number of lightning impulses of a known energy and was then subjected, for a period of 1000 hours, to accelerated ageing with metallic catalysts at 20 and 90°C in the presence of oxygen. The analysis of the dielectric properties reveals that ageing of carbonized oil samples leads to a faster and more intensive degradation of the fluid compared to uncarbonized oil

Keywords

ageing; electric breakdown; impulse testing; insulation testing; life testing; partial discharges; power transformer insulation; power transformer testing; transformer oil; 1000 h; 20 C; 90 C; accelerated ageing; ageing effects; carbonized transformer oil; dielectric dissipation factor; dielectric properties; insulation breakdown testing; lightning impulses; metallic catalysts; oil degradation; partial discharge inception voltage; volume resistivity; Accelerated aging; Dielectrics; Lightning; Minerals; Oil insulation; Petroleum; Power transformer insulation; Switches; Temperature; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on

Conference_Location

Montreal, Que.

ISSN

1089-084X

Print_ISBN

0-7803-3531-7

Type

conf

DOI

10.1109/ELINSL.1996.549403

Filename

549403