過電流によって熔端された銅電線の飛散特性および構造分析

カテゴリ: 部門大会

論文No: 65

グループ名: 【B】平成17年電気学会電力・エネルギー部門大会講演論文集

発行日: 2005/08/10

タイトル(英語): Analysis of Dispersive Characteristics and structures of Copper Wire Melted by Overcurrent

著者名: Chung Seog Choi (韓國電氣安全公社),Kil Mok Shong (韓國電氣安全公社),Dong Ook Kim (韓國電氣安全公社),Dong Woo Kim (韓國電氣安全公社),Young Seok Kim (韓國電氣安全公社)

著者名(英語): Chung Seog Choi (Electrical Safety Research Institute attached to Korea Electrical Safety Corporation),Kil Mok Shong (Electrical Safety Research Institute attached to Korea Electrical Safety Corporation),Dong Ook Kim (Electrical Safety Research Institute attached to Korea Electrical Safety Corporation),Dong Woo Kim (Electrical Safety Research Institute attached to Korea Electrical Safety Corporation),Young Seok Kim (Electrical Safety Research Institute attached to Korea Electrical Safety Corporation)

キーワード: Overcurrent|copper wire|dendrite structure|fusing current|fussing time

要約(日本語): In order to study the characteristics of copper wire according to the variation of fusing current, the analysis of melting process and structure of wire has been performed. Melting process was taken with HSIS(High Speed Imaging System) at a rate of 500 frames per second. A flash of light was seen at the center of the wire during melting process and a lot of small beads were scattered from the center to the outside of the wire. In the analysis of metallurgical structure, small dots grew into dendrite structure around grain boundary by overcurrent. Dendrite structure appeared in case that the values of current increase rate are lower than 2.5[A/sec], and the structure grew more according to the larger fusing time. Therefore, the growth of dendrite structure was related to the fusing time(current increase rate per time). The shorter the fusing time was, the narrower the melted areas were. SEM(Scanning Electron Microscope) and EDX(Energy Dispersive X-ray Spectrometer) analysis showed that oxygen is included in black dots of dendrite structure. An empirical equation was derived based on the experiments of fusing current, and the relationship among Preece, Onderdonk and the empirical equation was analyzed.

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