4 Element (3 Phase + EF) over current IDMT with instant trip. Instantaneous OC Protection with adjustable Timer. Selection of Curve: Six selectable curves (Normal Inverse1 (C1), Normal Inverse2 (C2), Very Inverse (C3), Extremely Inverse (C4), Long Time Inverse (C5) & Definite Time (C6). Separate curve selection for phase and EF. Latching of fault current up-to last 5 fault. Site selectable CT secondary Breaker Fail & Trip circuit supervision. RS 485 Port for Remote SCADA & IEC60870-5-103 Protocol for Communication.The ADR241C is a 3 OC and 1 EF Communicable Medium Voltage Protection relay with Instantaneous high set and programmable output design in very compact cabinet.