The apparatus and method to locate the leaking point efficiently under TN-C environment

摘要

The present invention relates to a method of detecting a short-circuited portion of a power line in a neutral grounding common power grid, measuring a voltage fluctuation rate between a neutral line and a remote ground of a PEN, The present invention proposes a device and a method for exploring a leakage point along a buried path of a power line, As in the prior art, the grounded neutral voltage of the equipotential conductor exposed to the power line PEN place or the adjacent customer facility is obtained, the remote ground and the voltage difference variation ratio are determined to determine the leakage current suspicion period, It is possible to track the electric power line PEN only for the power line PEN having a low voltage variation ratio and to measure the ground potential to grasp the leakage point. In this way, in the nearby customer facilities of the PEN designed to be the return point of the leakage current, the ground potential is elevated and the point where the voltage variation rate is low is restricted and reduced to the short-circuit survey object. Especially, as in Korea, it is changed from a stand-alone neutral ground to a common ground environment, so that it is possible to easily detect the short-circuited suspicion region by measuring whether the ground potential rises in a large number of non-grounded neutral customers. Efficient and economical short-circuit detection is possible.