AC degradation of impregnated polypropylene films

Author

Sebillotte, E. ; Theoleyre, S. ; Said, S. ; Gosse, B. ; Gosse, J.P.

Author_Institution

Varilec, Pringy, France

Volume

27

Issue

3

fYear

1992

fDate

6/1/1992 12:00:00 AM

Firstpage

557

Lastpage

565

Abstract

The aging of impregnated polypropylene (PP) film has been carried out on capacitor models at 80°C under 50 Hz AC electrical stress (137 V_rms/μm). The damage was estimated from the local measurement of the breakdown voltage of the PP film. The effects of impurities (electrolyte, water, oxygen) added to the impregnating liquid were observed. The relatively low breakdown voltages of the aged film measured in the electrically stressed region were no longer found when the liquid contained epoxides. A chemical degradation analyzed by FT-IR microspectroscopy and gel permeation chromatography was observed and found only in the region of lower dielectric strength

Keywords

ageing; dielectric losses; electric breakdown of solids; electric strength; environmental degradation; impurities; organic insulating materials; polymer films; power capacitors; 50 Hz; 80 C; AC degradation; FT-IR microspectroscopy; aging; breakdown voltage; capacitor models; chemical degradation; electrical stress; gel permeation chromatography; impregnated polypropylene films; impregnating liquid; impurities; local measurement; power capacitors; Aging; Aluminum; Breakdown voltage; Chemical analysis; Degradation; Dielectrics; Electric breakdown; Polymer films; Power capacitors; Stress;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.142719

Filename

142719