한국조명전기설비학회:학술대회논문집 (Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference)

한국조명전기설비학회 (The Korean Institute of IIIuminating and Electrical Installation Engineers)
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A Study on the Characteristics of Short Circuit through the Cross Section Analysis of Electric Wire

  • Shong, Kil-Mok (Electrical Safety Research Institute, Korea Electrical Safety Corporation) ;
  • Choi, Chung-Seog (Electrical Safety Research Institute, Korea Electrical Safety Corporation) ;
  • Kim, Yun-Hoi (National Institute of Scientific Investigation) ;
  • Kim, Sang-Hyeon (National Institute of Scientific Investigation) ;
  • Park, Nam-Kyu (National Institute of Scientific Investigation)
  • 발행 : 2005.05.13
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초록

For a fire cause judgement this paper describes the short circuit characteristics of a electric wire through the cross section analysis under ac condition. The cower wires prepared for the experiment were 1.2mm, 1.6mm, and 2.0mm in diameter. Through the cross section analysis(CSA), it was confirmed that the dendrite structure grew at the angle of about $40^{\circ}\;or\;60^{\circ}$ when the fusing current was applied to the wires. The larger the fusing current is, the more decreased the growth angle of the dendrite structure is. It was confirmed that the dendrite structure was arranged like the columnar structure. In this paper, the characteristics analysis of short circuit was carried out in the range of transient duration and the correlation constant k was investigated by measuring the short circuit duration and the fusing current.

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