DIGTAL RELAY BEING ABLE TO CHECK AND CORRECT MISS WIRING AND METHOD THEREOF

摘要

PURPOSE: A digital relay being able to check and correct miss wiring of a current transformer and a potential transformer and method thereof are provided to rapidly and stably monitor power. CONSTITUTION: An input sensing unit(110) detects 3-phase current and voltage in a power line. A phase comparator(120) compares the phase between the detected currents and between detected current and voltage. A controller(130) determines whether an error is in wiring according to a comparison result and output first and second control signals. A detected phase and an error in wiring is displayed based on the first control signal. The change of wiring having an error is controlled based on the second control signal.