Parameter Category Specification Product Family / Type Numerical Feeder Protection Relay Standard Compliance IEC 60255, IEC 61850 (with communication module), ANSI/IEEE C37.90 Rated Auxiliary Supply Voltage (Us) 48 - 250 V DC / 48 - 240 V AC, 50/60 Hz (Auto-ranging) Current Input (CT Secondary) 1 A or 5 A (Hardware selectable) Voltage Input (VT Secondary) 100 / 110 / 120 / 200 / 220 / 230 / 240 / 380 / 400 / 415 / 480 V AC (Phase-to-Phase) Protection Functions • Phase Overcurrent Two stages: Instantaneous (I>) & Time-delayed (I>>) with multiple IDMT/DT curves. • Earth-Fault Current Directional or Non-directional. One stage (I0>>) with IDMT/DT curves. Highly sensitive setting range. • Voltage Protection Two stages each for Undervoltage (U<) & Overvoltage (U>). Definite time delay. • Thermal Overload (49) Single time constant model, alarm and trip stages. Setting Ranges (Typical) • Phase Current 0.1 - 15.0 x In (In steps) • Earth Current 0.01 - 3.00 x In (In steps) • Voltage 10 - 130% of Un (Un = Rated VT input) Measured Values (Display) IL1, IL2, IL3, I0 (earth), UL1, UL2, UL3, Uavg, Freq, P, Q, S, PF, etc. Output Contacts • Trip Relays 3 Changeover (CO) contacts, high-breaking capacity. • Signal Relays 3 Changeover (CO) contacts for alarms/signaling. • Binary Inputs 4 or 5 programmable, for external control/blocking. Communication (Optional) Plug-in modules for: IEC 61850, Modbus RTU (RS485), Profibus DP, IEC 60870-5-103. Human-Machine Interface (HMI) Backlit graphical LCD, 6 navigation keys, 6 LED indicators (Ready, Trip, Alarm, etc.). Event Logging Stores time-tagged fault records, alarms, and operations. Operating Temperature -25°C to +70°C (-13°F to +158°F) Housing & Mounting Compact, modular plastic case. Suitable for flush mounting on panel door or DIN rail. Dimensions (W x H x D) Approximately 105mm x 145mm x 122mm (specific to case style).