Temperature diffusion distribution of electric wire deteriorated by overcurrent (特集:平成19年[電気学会]電力・エネルギー部門大会)

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概要

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• This study presents thermal diffusion distribution of the electric wires when overcurrent is supplied to copper wires. And then, this study intends to provide a basis of knowledge for analyzing the causes of electric accidents through hybrid technology. In the thermal image distribution analysis of the electric wire to which fusing current was supplied, it was found that less heat was accumulated in the thin wires because of easier heat dispersion, while more heat was accumulated in the thicker wires. The 3-dimensional thermal image analysis showed that heat distribution was concentrated at the center of the wire and the inclination of heat distribution was steep in the thicker wires. When 81A was supplied to 1.6mm copper wire for 500 seconds, the surface temperature of wire was maximum 46.68°C and minimum 30.87°C. It revealed the initial characteristics of insulation deterioration that generates white smoke without external deformation. In the analysis with stereoscopic microscope, the surface turned dark brown and rough with the increase of fusing current. Also, it was known that exfoliation occurred when wire melted down with 2 times the fusing current. With the increase of current, we found the number of primary arms of the dendrite structure to be increased and those of the secondary and tertiary arms to be decreased. Also, when the overcurrent reached twice the fusing current, it was found that columnar composition, observed in the cross sectional structure of molten wire, appeared and formed regular directivity.As described above, we could present the burning pattern and change in characteristics of insulation and conductor quantitatively. And we could not only minimize the analysis error by combining the information but also present the scientific basis in the analysis of causes of electric accidents, mediation of disputes on product liability concerning the electric products.

• 社団法人 電気学会の論文
• 2008-01-01

著者

• Kim Hyang-kon

  Electrical Safety Research Institute A Subsidiary Of Korea Electrical Safety Corporation

• CHOI Chung-Seog

  Electrical Safety Research Institute, a subsidiary of Korea Electrical Safety Corporation

• KIM Dong-Woo

  Electrical Safety Research Institute, a subsidiary of Korea Electrical Safety Corporation

• LEE Ki-Yeon

  Electrical Safety Research Institute, a subsidiary of Korea Electrical Safety Corporation

• Lee Ki-yeon

  Electrical Safety Research Institute A Subsidiary Of Korea Electrical Safety Corporation

• Kim Dong-ook

  Electrical Safety Research Institute A Subsidiary Of Korea Electrical Safety Corporation

• Choi Chung-seog

  Electrical Safety Research Institute A Subsidiary Of Korea Electrical Safety Corporation

• Kim Dong-woo

  Electrical Safety Research Institute A Subsidiary Of Korea Electrical Safety Corporation

関連論文

• Temperature diffusion distribution of electric wire deteriorated by overcurrent (特集:平成19年[電気学会]電力・エネルギー部門大会)
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• The Potential Gradient of Ground Surface according to Shapes of Mesh Grid Grounding Electrode using Reduced Scale Model (特集:平成17年〔電気学会〕電力・エネルギー部門大会)
• Analysis of Dispersive Characteristics and Structures of Copper Wire Melted by Overcurrent (特集:平成17年〔電気学会〕電力・エネルギー部門大会)

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