Abstract
For the establishment of a more effective grounding design, it is necessary to clarify a transient behavior of a grounding system. In order to verify the current dependency of the grounding electrodes in a distribution system and the behavior of the lightning surges into customer’s premise through the power lines, experiments were conducted using the 3MV impulse voltage generator on a full-scale distribution system and a power line surge simulation mock-up constructed for this purpose. As a result, the behavior of the currents in the distribution system and the possible effects of mutual interference between grounding potentials were successfully identified. In addition, with the lightning surge flow, applied current and low-voltage grounding system parameters, it was possible to evaluate the magnitude of the lightning surges into customer’s facility.
