During the operating process of Neutralgrounding resistor, intelligent monitor and protection device is required becausethe huge changes of fault current and temperature. MRD-ZRK Intelligent MonitoringDevice for Neutral Grounding Resistor is designed to monitor the cabinettemperature, resistor temperature, grounding fault current and time, and alsonumbers of grounding fault, enable to monitor the real-time conditions in thecabinet.