Natural and accelerated aging of non ceramic insulators: leakage current and surface characterization

Author

Inone, P.C. ; Piazza, F. ; Tomioka, J. ; Sales, J.M.M.

Author_Institution

Dept. of Mater., Inst. of Technol. for Dev., Curitiba, Brazil

Volume

1

fYear

2003

fDate

1-5 June 2003

Firstpage

389

Abstract

Natural and laboratory aged insulators were characterized in order to evaluate the surface degradation. Emphasis was given to the comparative study between different materials used as weathershed, i.e., silicone, EPDM, epoxy and polyethylene. It was observed that under severe conditions of salinity, epoxy insulators suffered from loss of hydrophobicity besides have failed in the 1000 hours salt fog test. EPDM and polyethylene insulators suffered from loss of hydrophobicity but passed in the 1000 hours salt fog test and showed low leakage currents. Silicone insulators did not show loss of hydrophobicity and showed low leakage currents along the 1000 hours salt fog test.

Keywords

ageing; epoxy insulation; ethylene-propylene rubber; leakage currents; polyethylene insulation; silicone insulation; 1000 hour; EPDM; accelerated aging; epoxy insulator; hydrophobicity; leakage current; non ceramic insulator; polyethylene insulator; salt fog test; silicone insulator; surface degradation; Accelerated aging; Ceramics; Current measurement; Degradation; Dielectrics and electrical insulation; Epoxy resins; Insulator testing; Leakage current; Metal-insulator structures; Polyethylene;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 2003. Proceedings of the 7th International Conference on

ISSN

1081-7735

Print_ISBN

0-7803-7725-7

Type

conf

DOI

10.1109/ICPADM.2003.1218433

Filename

1218433