Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Electrical Strength Analysis of Toughened Glass Stem Insulator for Electric Railways

전기철도용 유리애자 전기적 강도 해석

  • Jung, Jong-Wook (Electrical Facilities Safety Research Group, Electrical Safety Research Institute, KESCO) ;
  • Jung, Jin-Soo (Electrical Facilities Safety Research Group, Electrical Safety Research Institute, KESCO) ;
  • Kim, Young-Seok (Electrical Facilities Safety Research Group, Electrical Safety Research Institute, KESCO) ;
  • Kim, Sun-Gu (Electrical Facilities Safety Research Group, Electrical Safety Research Institute, KESCO)
  • 정종욱 (한국전기안전공사 전기안전연구원 설비안전연구그룹) ;
  • 정진수 (한국전기안전공사 전기안전연구원 설비안전연구그룹) ;
  • 김영석 (한국전기안전공사 전기안전연구원 설비안전연구그룹) ;
  • 김선구 (한국전기안전공사 전기안전연구원 설비안전연구그룹)
  • Published : 2008.06.19
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Abstract

This paper describes the electrical strength of a toughened glass stem insulators employed for electric railways. The broken glass stem insulators for comparison were taken at site. According to the international standards, electrical strength tests with 60[Hz] voltage and with impulse voltage were carried out to them under dry and wet condition and the results were corrected by considering the temperature and humidity factors. Based on the experimental results, the electrical strength of broken glass stem insulators was compared with those of sound ones and surface flashover characteristics were also discussed. As a result, it was confirmed that the electrical discharge is formed by bridging each end of the insulator shell. The experimental results are expected to be utilized as data for electrically identifying the failure causes of glass insulators.

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