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http://dx.doi.org/10.14346/JKOSOS.2015.30.4.46

Measurement and Analysis of Ground Impedance according to Arrangement of Auxiliary Probe around Ground Grid  

Gil, Hyoung-Jun (Electrical Safety Research Institute)
Shong, Kil-Mok (Electrical Safety Research Institute)
Kim, Young-Seok (Electrical Safety Research Institute)
Kim, Chong-Min (Electrical Safety Research Institute)
Publication Information
Journal of the Korean Society of Safety / v.30, no.4, 2015 , pp. 46-50 More about this Journal
Abstract
This paper describes the measurement and analysis of ground impedance according to arrangement of auxiliary probe around ground grid using the fall-of-potential method and the testing techniques to minimize the measuring errors are proposed. The fall-of-potential method involves passing a current between a ground electrode and a current probe, and then measuring the voltage between a ground electrode and a potential probe. To minimize interelectrode influences due to mutual resistances, the current probe is a generally placed at a substantial distance from the ground electrode under test. In order to analyze the effects of ground impedance due to the arrangement of auxiliary probe and frequency, ground impedances were measured in case that the arrangements of auxiliary probe were straight line, perpendicular line, and horizontal line. The distance of current probe was located from 10[m] to 200[m] and the measuring frequency was ranged from 55[Hz] to 513[Hz]. As a consequence, the ground impedance increases with increasing the distance from the ground electrode to the point to be tested, but the ground impedance decreases with increasing the frequency.
Keywords
ground impedance; auxiliary probe; ground grid; interelectrode influences;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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