Composite protective relay device having Rogowski Coil Current Transducer

摘要

The subject innovation relates to a composite relay, in the resistive composite relay a signal transmission driver for ever receives each measurement value of the transformer according to the present invention outputs a voltage according to the state,; Processing the measured value of the transformer for conditional access according to a key input unit for receiving a DIP switch unit, and correction for selecting to perform only some of the relay element according to protected by the ADC circuit to input to the central processing unit and the comparison processing in the central processing unit driving the signaling driver to a control signal and configured to display and transmitted to the display unit, wherein the transformer is electronically that by employing a resistance type shift converter comprising a Rogowski coil, easily enters to lower the signal detection ability as conventional supersaturated using resistive transformer for one, use a Rogowski coil replaces the CT and PT output characteristics of the fault current is generated to maintain the linearity of the infinite, so perfect for the maintenance and monitoring of power quality to accurately restore the fault current there is an effect that can be processed.