Title :
Ageing and diagnostics in extruded insulations for power cables
Author_Institution :
Ontario Hydro, Toronto, Ont., Canada
Abstract :
There are several polymers being used as extruded insulation in high-voltage power cables from 5 kV up to 500 kV. They include low density polyethylene (LDPE), crosslinked polyethylene (XLPE), tree-retardant crosslinked polyethylene (TRXLPE) and different formulations of ethylene propylene rubber (EPR). The ageing mechanisms of extruded insulations operating under wet (usually for medium-voltage cables) and dry conditions (for high-voltage cables) have been discussed. Diagnostic techniques, both destructive and non-destructive, have also been discussed using the possible ageing mechanisms as a basis
Keywords :
XLPE insulation; ageing; dielectric losses; electric breakdown; ethylene-propylene rubber; insulation testing; nondestructive testing; permittivity; polyethylene insulation; power cable insulation; 5 to 500 kV; EPR; LDPE; TRXLPE; XLPE; ageing; ageing mechanisms; crosslinked polyethylene; destructive techniques; diagnostic techniques; diagnostics; dry conditions; ethylene propylene rubber; extruded insulation; high-voltage cables; high-voltage power cables; low density polyethylene; medium-voltage cables; nondestructive techniques; polymers; power cables; tree-retardant crosslinked polyethylene; wet conditions; Aging; Cable insulation; Medium voltage; Paramagnetic resonance; Plastic insulation; Polyethylene; Polymers; Power cables; Rubber; Trees - insulation;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1995. ICSD'95., Proceedings of the 1995 IEEE 5th International Conference on
Conference_Location :
Leicester
Print_ISBN :
0-7803-2040-9
DOI :
10.1109/ICSD.1995.522940
