Title :
Threshold voltage for electrical tree inception in underground HV transmission cables
Author :
Bamji, S.S. ; Bulinski, A.T. ; Chen, Y. ; Densley, R.J.
Author_Institution :
Nat. Res. Council of Canada, Ottawa, Ont., Canada
fDate :
4/1/1992 12:00:00 AM
Abstract :
Experimental evidence is provided to show that irreversible aging which leads to electrical treeing in polymeric insulation such as low-density and crosslinked polyethylene used in HV transmission cables, does not start at local fields between 5 and 20 kV/mm. It is shown that a much higher stress is required for electrical tree inception and that the electroluminescence inception voltage is the threshold voltage at which the polymer starts to degrade
Keywords :
electric breakdown of solids; electroluminescence; organic insulating materials; polymers; power cables; underground cables; LDPE; XLPE; aging; electrical tree inception; electrical treeing; electroluminescence inception voltage; polymeric insulation; underground HV transmission cables; Aging; Cable insulation; Dielectrics and electrical insulation; Plastic insulation; Polyethylene; Polymers; Stress; Threshold voltage; Trees - insulation; Underground power cables;
Journal_Title :
Electrical Insulation, IEEE Transactions on
