Title :
Lifetime estimation of medium voltage cables in wet environments
Author_Institution :
Cables & Insulating Mater. Res. Inst., Bratislava, Czechoslovakia
Abstract :
An analysis of the time-breakdown strength characteristics of cables with various kinds of insulations aged under essential service stressors (electrical stress, thermal stress, and water) is reported. Specifically, attention is given to MV cables with synthetic insulation and sheath installed in locations where, during service, water can enter into the insulation. The analysis revealed the main causes of cable aging. Structural properties seem to be responsible for the degradation of the insulation. A novel method for selection of insulating material, making it possible to tailor insulation with respect to required life expectancy, is presented. Methods for testing and lifetime estimation of full-size cables are given
Keywords :
ageing; cable testing; environmental testing; life testing; materials testing; organic insulating materials; polymers; power cables; MV cables; cable aging; electrical stress; essential service stressors; full-size cables; insulating material; insulation degradation; life expectancy; lifetime estimation; medium voltage cables; sheath; structural properties; synthetic insulation; testing methods; thermal stress; time-breakdown strength characteristics; water; wet environments; Aging; Cable insulation; Dielectrics and electrical insulation; Life estimation; Lifetime estimation; Medium voltage; Thermal degradation; Thermal stresses; Underwater cables; Water;
Conference_Titel :
Electrical Electronics Insulation Conference, 1989. Chicago '89 EEIC/ICWA Exposition., Proceedings of the 19th
Conference_Location :
Chicago, IL
DOI :
10.1109/EEIC.1989.208212
