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The Properties of Waveform and Plug Formed by Poor Contact of Power Cord Sets  

Choi Chung-Seog (Electrical Safety Research Institute attached to KESCO)
Kim Hyang-Kon (Electrical Safety Research Institute attached to KESCO)
Kim Dong-Ook (Electrical Safety Research Institute attached to KESCO)
Kim Young-Seok (Electrical Safety Research Institute attached to KESCO)
Publication Information
Journal of the Korean Society of Safety / v.20, no.1, 2005 , pp. 87-93 More about this Journal
Abstract
In this paper, we analyzed ignition characteristics of combustible material and the waveform of power dissipation, voltage and current by poor contact. And the surface structure of plug by poor contact was analyzed. In the results of experiment, the heat generated by poor contact and ignited the combustible material on power cord sets. The insulation material was molten and carbonized by the heat conduction though plug pit and voids were formed inside of insulation material. The waveform of voltage and power dissipation distorted because of a growth of oxidation by poor contact. In particular, in case that load was big load, the waveform of voltage and power dissipation severely distorted as with the passage of time. The surface of plug pin was changed from erosion mark to welding mark according to big load. The results will be applied to the cause analysis of electrical disaster.
Keywords
poor contact; power cord sets; ignition; waveform; power dissipation;
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