Study of cross-linked polyethylene under high field

Author

Clavreul, R. ; Fourmigue, J.M. ; Duchatea, F. ; Berdala, J. ; Parpal, J.-L.

Author_Institution

Electr. de France, Paris, France

fYear

1992

Firstpage

650

Lastpage

655

Abstract

The authors describe some initial work on the laboratory aging of XLPE (cross-linked polyethylene) cables under high electrical stress (30 kV/mm) with or without thermal cycling during four months. After aging, the XLPE insulation was characterized by electrochemistry, differential scanning calorimetry, and Fourier transform infrared spectroscopy. It was observed that a large quantity of water (from 50 to 100 ppm) was often correlated with water trees in aged cables. When the water quantity was lower, water trees were found only after a mechanical stress of the lead cover. Decreases of crystallinity percentage and fusion temperature were also observed

Keywords

Fourier transform spectra; ageing; cable insulation; electric breakdown of solids; insulation testing; organic insulating materials; oxidation; polymers; spectrochemical analysis; thermal analysis; Fourier transform infrared spectroscopy; XLPE cable; XLPE insulation; aging; crystallinity percentage; differential scanning calorimetry; electrochemical observations; fusion temperature; high electrical stress; high field; mechanical stress; oxidation; thermal cycling; water trees; Aging; Cables; Calorimetry; Crystallization; Fourier transforms; Infrared spectra; Polyethylene; Temperature; Thermal stresses; Trees - insulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on

Conference_Location

Victoria, BC

Print_ISBN

0-7803-0565-5

Type

conf

DOI

10.1109/CEIDP.1992.283144

Filename

283144