Parameters Category Parameter Specification / Interpretation for 1SDA066322R1 General Functional Model REF615 Feeder Protection Relay Product Line Relion® 615 Series Hardware Level Likely "C" (Control) or "E" (Enhancement) Level Power Supply Operational Voltage Common: 110-250 V DC (Substation battery) or 110-230 V AC. Analog Inputs Rated Current (In) 1 A or 5 A (Defined by order code). Thermal Withstand Continuous: 4 x In; 1s: 100 x In. Voltage Inputs 100-120V or 190-230V line-to-neutral (via VTs). Digital I/O Binary Inputs (BI) Typically 16 (configurable in groups). Output Relays Typically 6 Trip/Close (PO) + 8 Signal (BO). Human-Machine Interface Display Graphical LCD with backlight. Local Control Keypad for navigation and operation. Communication Primary Protocol IEC 61850-8-1 (MMS & GOOSE) Secondary Protocols IEC 60870-5-103, Modbus RTU. (DNP3 may not be included in this variant). Physical Ports 2 x Ethernet (RJ45 + Optical), 2 x RS485. Protection Functions Core ANSI Functions 67/67N (Dir. OC/EF), 50/51/51N, 27/59, 79 (Recloser), 49 (Thermal), 81U/f, 50BF (CB Fail). Metering & Monitoring Measurements I, V, P, Q, S, PF, F, Energy – Class 0.5/1.0. Power Quality Harmonics, unbalance. Disturbance Recorder Oscillographic (≥ 8 analog channels). Event Log (SOE) ≥ 1024 time-tagged events. Logic Programmability CFC (IEC 61131-3) & Sequence Control. Environmental Operating Temperature -25°C to +70°C (standard). Protection Degree IP40/IP52 (panel mounted). Standards Compliance IEC 60255, IEC 61850, IEEE C37.90, IEC 61000-4 (EMC).