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김주용(Ju-Yong Kim),송일근(Il-Keun Song),김동명(Dong-Myung Kim),윤태상(Tae-Sang Yun),정상봉(Sang-Bong Jeong) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.5월
The purpose of this experiment is to modify diagnosis criterion of isothermal relaxation current(IRC) measurement equipment which is using for distribution cable diagnosis. We"re using this system for several years in the field instead of DC leakage current measurement and lots of cables were replated. But we have to investigate on the reliability of this equipment for our cables because we didn"t carried out condition assessment of extracted cables after field diagnosis by this equipment. It is important thing for cable maintenance. If the replacement criterion is improper we can not prevent failures or will waste budget on account of replacement of the sound cables. In this paper we selected field installed cables and injected silicone fluid to the cables for insulation rehabilitation. In order to prove reliability of the diagnosis equipment we compared diagnosis results and AC breakdown strength according to operating time after silicone treatment. This is the results of the field test for 1 year.