등온완화전류분석법과 케이블큐어를 이용한 전력케이블 유지보수 효율화
Power Cable Maintenance using Cable Cure based on Isothermal Relaxation Current Measurement
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초록
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.
Abstract
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.
참고문헌 (8)
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- 한우테크㈜, "전력케이블 보강 방안(Cable Cure 기술)", ~ (2013)
- 산업통상자원부, "전기설비의 기술기준", ~ (2014)