• Title/Summary/Keyword: electrical facilities

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A Study on the statistiscal analysis and the Electrical Shock hazard for electrical power facilities of 22.9kV substation (22.9kV 수.변전설비의 감전사고 발생현황 및 감전위험성 연구)

  • Han, Ki-Boong;Lee, Dae-Jong;Han, Woon-Ki
    • Proceedings of the KIEE Conference
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    • 2002.07c
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    • pp.1813-1815
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    • 2002

  • As the statistical data, the electrical shock accidents by electrical power facilities of 22.9kV substation is about 100 per years which shows very high occupation rate of 11.3%. There is many hazard factors in this place using high voltage because electrical accident can be occurred in near live part as well as contact. Regarding electrical shock accident in 22.9kV substation as there are many cases that have not been exposed industrial disaster, it is very hard to know exact causes of such accidents in many cases, and therefore it is difficult to set up effective preventive measures. Therefore in this paper, it is intended to prepare the basic data to establish more effective preventive measures of electric shock accidents in 22.9kV substation through understanding the real conditions based on investigation and analysis in various types.

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Characteristics of a Corona between a Wiring Clamp(Dead End Clamp) and a Porcelain Insulator Used in a 154[kV] Power Receptacle

  • Han, Un-Ki;Kim, Jong-Min;Bang, Sun-Bae;Kim, Han-Sang;Choi, Hyeong-Jun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.21 no.9
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    • pp.57-63
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    • 2007

  • The occurrence of a corona is that electrical discharge due to the heterogeneity that occurs when an electrical field is concentrated in an electrode due to a cusp formed on said electrode. Wire treatment at the end of a 154[kV] dead end clamp for end users accelerates the occurrence of corona, which in turn leads to power loss and noise. In this study, the characteristics of the corona which occurs between porcelain insulators and support clamps of overhead lines used in 154[kV] power receiving facilities for end users were investigated. The corona, which cannot be identified by one common method, was measured utilizing a UV image camera. A risk assessment for fire damage and its status was suggested. The stress distribution of the electrical field by length of bare wire was suggested by means of the finite element method(FEMLAB). As a result, it was found to affect a porcelain insulators. These results can be utilized for the enhancement of clamp installation and safety in power facilities.

  • https://doi.org/10.5207/JIEIE.2007.21.9.057 인용 PDF KSCI