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http://dx.doi.org/10.5207/JIEIE.2002.16.2.121

Reduction of the the Ground Surface Potential Gradients by Installing Auxiliary Grounding Grids  

이승칠 ((주) 한진중공업 상무(공학박사))
엄주홍 (인하대 대학원 전기공학과)
이복희 (인하대 공대 전자전기공학부)
김효진 (한국 전기공사협회 연구소)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.16, no.2, 2002 , pp. 121-129 More about this Journal
Abstract
The present paper describes a technique for installing an effective grounding grids, the major objective is forced on the experimental evaluation of the performance and characteristics with the arrangement and installation method for grounding grids consisting of the means to protect electric shock, electronics and computerized facilities against lightning, switching and ground fault surges. The study is oriented on two major areas: (1) the analysis of the ground surface potential gradient with the arrangement of grounding grids, (2) the control of the dangerous ground surface potential rise. The experiments wee carried out with the impulse currents as a function of the installation method or arrangement of grounding grids. An installation method of the inclined auxiliary grounding grid was proposed to overcome the drawbacks of equally spared grounding grids, i.e. an appropriate design concept far the installation of grounding grids was found out, It has been shown that the installation of the intwined auxiliary grounding grid can also result in a mere than 50% decrease in the maximum potential gradient on the ground surface and enhance the level of safety for persons and electronic equipments..
Keywords
Grounding grid; Ground surface potential gradient; Auxiliary grounding grid; Ground surface; potential rise; Touch voltage; Step voltage; Impulse current Fall-of-potential method;
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