Title :
An assessment of field aged 15 and 35 kV ethylene propylene rubber insulated cables
Author :
Katz, Carlos ; Walker, Michael
Author_Institution :
Cable Technol. Lab. Inc., New Brunswick, NJ, USA
Abstract :
Data are provided from laboratory evaluations performed on ten 15 kV and five 35 kV ethylene-propylene copolymer rubber (EPR) feeder cables, made by one manufacturer and ranging in service age from 2 to 22 years. The evaluations consisted of visual examination of cable components, including the presence of water trees in the insulation and physical and electrical tests to establish changes which may have occurred in service. The data are used to establish an in-service rate of degradation for cables, up to 13 years in service, made with one type of EPR formulation. Based on an extrapolation of the breakdown voltage test results, it is expected that this type of cable will have a service life in excess of 30 years
Keywords :
ageing; cable insulation; cable testing; electric breakdown of solids; insulation testing; life testing; organic insulating materials; power cables; rubber; 15 kV; 2 to 22 y; 35 kV; breakdown voltage test results; cable components; electrical tests; ethylene propylene rubber insulated cables; field aged cables; in-service degradation rate; physical tests; visual examination; water trees; Aging; Cable insulation; Dielectrics and electrical insulation; Insulation testing; Laboratories; Manufacturing; Paramagnetic resonance; Performance evaluation; Rubber; Trees - insulation;
Conference_Titel :
Transmission and Distribution Conference, 1994., Proceedings of the 1994 IEEE Power Engineering Society
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1883-8
DOI :
10.1109/TDC.1994.328438
