• Fire Science and Engineering
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• v.22 no.1
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• pp.24-28
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• 2008

This paper studied on the causal analysis of electrical fire by using fuse that it is used with safety device in electrical products. The experimental samples used are glass tube fuse(15 A, $5{\times}20mm$) and temperature fuse(10 A, $72^{\circ}C$). The experiment analyzed on the characteristics of damaged fuse by main causes(short circuit, overload, external flame) of electrical fire. The results showed, in case of glass tube fuse identified different characteristics in external form and element surface and element texture of damaged fuse by main causes of electrical fire. In case of temperature fuse identified different characteristics in external form and sliding contact surface and sliding contact texture of damaged fuse only by external flame.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.10
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• pp.31-36
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• 2018

Fuses are used to protect electric circuits or devices from excess current. Glass-tube fuses are typically used, but problems have arisen due to the mandated switch from conventional solder to lead-free solder. This study used CFD to simulate the phenomenon of molten solder being poured out of a fuse during the soldering process for a fuse cap and fuse element. In addition, a method is proposed to prevent solder from overflowing, and its effectiveness was verified based on the analysis results. The results show that a sufficient increase of the temperature inside the glass tube before soldering and gravity can help to prevent the solder from overflowing.