On-Line 및 Off-Line 상태에 따른 누설 전류 진단 분석 = Analysis of Leakage Current Diagnosis According to Online and Offline Conditions

다국어 초록 (Multilingual Abstract)

When the clamp meter approaches the electric path where current is flowing, leakage current can be measured at a distance from the electric current because the induced current increases as the magnitude of the current increases and approaches nearer to the electric path. Therefore, measurements were carried out from a distance to avoid this effect. In addition, the measured values differ depending on the location of the power line that penetrates the ZCT of the clamp meter, thus measurements were performed at a location where this effect was minimized. The fraction of compliant branch circuits, whose leakage current was lower than 1.00 mA, was found to be 69.0% out of the total of 439 branch circuits, while the percentage of compliant branch circuits having an insulation resistance higher than $0.20M{\Omega}$ was found to be 93.2%. The reason why the percentage of compliant branch circuits with low leakage current was low might be due to the inclusion of capacitive leakage current in the total measured leakage current.

참고문헌 (Reference)

1 B. I. Bae, Hanyang University 2005

2 Y. B. Lim, Korean Inst. Illuminating & Elect. Installation Eng. 260-, 2006

3 N. K. Joo, Korean Inst. Electr. Eng. 172-, 2009

4 C. S. Choi, Korean Inst. Electr. Eng. 301-, 2008

5 함승진, "새로운 저항성 누전전류 측정 방법" 대한전기학회 56 (56): 1397-1404, 2007

6 김동우, "누설전류로 인한 전기화재 및 감전사고 예방기법" 한국조명.전기설비학회 27 (27): 82-87, 2013