APPARATUS AND METHOD FOR DETECTING LEAKAGE CURRENT

摘要

Provided is an apparatus and method for detecting leakage current in DC applications, capable of separately operating depending on leakage current patterns of a human body and a facility in a TN grounding system. The apparatus for detecting the leakage current is a leakage current detector in a DC distribution system of the TN grounding manner and includes a leakage current detecting unit configured to detect a current flow between a DC power unit and a load to detect whether the leakage current is generated and a level of the leakage current and a leakage current determining unit configured to determine that the cause of the leakage current is either an electric shock to a human or a facility ground fault according to a rate of hourly change in the level of the leakage current detected in the leakage current detecting unit.

主权项

1. An apparatus for detecting leakage current in a DC distribution system of a TN grounding manner, the apparatus comprising:
a leakage current detecting unit configured to detect a current flow between a DC power unit and a load to detect whether the leakage current is generated and a level of the leakage current; and a leakage current determining unit configured to determine that the cause of the leakage current is either an electric shock to a human or a facility ground fault according to a rate of hourly change in the level of the leakage current detected in the leakage current detecting unit.