Title :
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
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;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0565-5
DOI :
10.1109/CEIDP.1992.283144
