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http://dx.doi.org/10.5207/JIEIE.2002.16.4.038

Problems and Countermeasures in Installation of Down Conductor Systems  

이복희 (인하대학교 전자전기공학부)
이동문 (인하대학교 전자전기공학부)
강성만 (인하대학교 전자전기공학부)
엄주홍 (인하대학교 전자전기공학부)
정동철 (인하대학교 전자전기공학부)
이승칠 (인하대학교 전자전기공학과 한진중공업주식회사 상무)
안창환 (한국전력)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.16, no.4, 2002 , pp. 38-45 More about this Journal
Abstract
This paper describes the technical issues of the domestic standard and guideline for lightning protection systems in order to propose the countermeasures in damage of computer and electronic equipments due to lightning surges. The relationship between the current flow in the down conductor and the current flow in the steel conduit surrounding the down conductor was investigated as a function of the installation method of down conductors. Also the experiments were conducted to evaluate the influences of the skin effect on the down conductor systems. As a result, when the down conductor were bonded to the steel conduit, the down conductor and the steel conduit act as one conductor, so much mure lightning current flows in the steel conduit than in the copper down conductor because of the skin effect and choking effect. Therefore to reduce the adverse effects such as the electrostatic induction and side flashes caused by the potential rise of down conductors due to lightning currents, it is extremely effective to bond the down conductor to the steel conduit and steel frame of structures.
Keywords
Lightning protection system; Lighting impulse current; Skin effect; Chocking effect; Down conductor;
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