Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Study on the Cut Off Characteristics and Graphite Analysis of Residual Current Protective Devices for Low Voltage

저압용 누전차단기의 차단특성 및 그라파이트 분석에 관한 연구

  • 최충석 (한국전기안전공사 전기안전시험연구원) ;
  • 이경섭 (동신대학교 전기전자공학과) ;
  • 정재희 (서울산업대학교 안전공학과) ;
  • 박수홍 (인하대학교 전기공학과) ;
  • 김병수 (인하대학교 전기공학과) ;
  • 이덕출 (인하대학교 전기공학과)
  • Published : 1999.03.01
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Abstract

In this paper. we studied cut off characteristics and fire hazard of residual current protective devices(RCD or ELB) for low voltage. The operative time of RCD with grounding resistance was analyzed by using RCD operating tester. The surface structure and composition of insulator were analyzed by using scanning electron microscope(SEM) and energy dispersive x-ray spectroscopy(EDX). The surface of phenol resin showed network structure and void. The spectra shown in EDX analysis are composed not only of the corresponding elements but also of several new spectra, as CK. OK$\alpha$. MgK, SiK. and CaK, which were absent in original material.

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