Transient Impedance Characteristics of Grounding System under Impulse Currents

초록

This paper deals with the experimental results of the transient behavior of ground impedance under impulse current. These investigations have been carried out on the site of a single grounding rid and a large-scale grounding system consisted of grounding grids and piles. It was found that the transient ground impedance and ots electrical behaviors strongly depend on the lengths of grounding conductors and leads. Also the ground potential rise of a large-scale grounding system was remarkedly subjected to the effect of inductive component of the grounding conductors and leads, and the impedance was significantly greater than stationary ground resistance.