Title :
Influence of migration on the electrical properties of HV extruded cables
Author :
Marlard, T. ; Bezille, J. ; Janah, H. ; Becker, J.
Author_Institution :
Alcatel Cable, Paris, France
Abstract :
Radial distribution of the electrical characteristics of HV XLPE insulated cables was investigated with respect to EEA or EBA oligomers migration into the insulation. During processing and aging, the migration of low molecular weight fractions of EEA or EBA copolymers used in semiconductive compounds gives rise to an increase of tan∂ close to the semiconductive shields, and to a decrease of AC and DC breakdown strengths. However, this migration seems to increase the impulse breakdown strength, and to avoid bow-tie trees development
Keywords :
ageing; cable insulation; electric breakdown of solids; electric strength; impulse testing; insulation testing; organic insulating materials; polymer blends; polymers; power cables; EBA; EEA; HV; XLPE; aging; breakdown strengths; cable insulation; copolymers; electrical properties; impulse breakdown; insulation testing; migration; oligomers; power cables; processing; semiconductive compounds; tan delta;
Conference_Titel :
Power Cables and Accessories 10kV - 500kV, 1993., Third International Conference on
Conference_Location :
London
Print_ISBN :
0-85296-592-3
