Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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The Experimental Verification and Fault Cause Analysis of Breakdown on the 6.6kV class Cable Joint

6.6kV급 케이블 중간접속부의 절연파괴 사고원인 분석과 실험 검증

  • Kim, Young-Seok (Electrical Safety Research Institute subsidiary of Korea Electrical Safety Corporation) ;
  • Shong, Kil-Mok (Electrical Safety Research Institute subsidiary of Korea Electrical Safety Corporation) ;
  • Jung, Jin-Su (Electrical Safety Research Institute subsidiary of Korea Electrical Safety Corporation)
  • 김영석 (한국전기안전공사 전기안전연구원) ;
  • 송길목 (한국전기안전공사 전기안전연구원) ;
  • 정진수 (한국전기안전공사 전기안전연구원)
  • Published : 2009.07.14
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Abstract

In this paper, we examined the faulted cable joint through the external form analysis, material analysis, experimental verification and it's cause diagnosis system. It was not observed the voild, sharp material from the external form analysis and material variation. From the experimental verification, the thickness decrease of an insulator decreased ac breakdown strength suddenly and the breakdown traces of the insulator that was damaged by knife displayed elliptic shape. Thus, the faulted cable is assumed to accident that become dielectric breakdown by the deterioration of insulation performance that can happen when work.

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