보조전극을 수직으로 배치하는 접지저항 측정방법의 제안

초록

In these days, Grounding system of large buildings are constructed by the combination of foundation structures and grounding grids. Because the distances between the grounding grid and auxiliary electrodes are not enough in down areas, it is very difficult to measure the ground resistance of large-scaled system. In some cases, auxiliary electrodes are located in grounding grid. It is very wrong to precisely measure the ground resistance. For this reason, this paper presents the method of measuring the ground resistance by using the vertically-placed auxiliary electrodes. The potential distribution curves between the grounding grid being measured and the current auxiliary electrode for different-sized grounding grid are calculated. The location of the potential auxiliary electrodes to measure the ground resistance with the measurement accuracy less than 5% is determined.