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남영희(Y. H. Nam),최규형(K. H. Choi),박민기(M. G. Park) 한국도시철도학회 2016 한국도시철도학회논문집 Vol.4 No.1
This paper proposes IRC(Isothermal Relaxation Current)measurement to detect insulation degradation of power cable in electric railway. Test results show that Megger measurement cannot detect the insulation degradation of power cable by void or watertree, but IRC measurement is able to detect the insulation degradation. An application guide for insulation enforcement using cable cure based on IRC measurement is proposed, too. It is proposed that cable cure is effective when the aging factor from IRC measurement is greater than 2.3, and the cost will be saved by 60~70% compared to construction of new power cable.