Key Specifications Parameter Value Brand Schneider Electric / nVent (formerly Samwha EOCR) Series EOCR-iSEMM (intelligent Smart Energy Motor Management) Product Type Multifunctional Electronic Motor Protection Relay with Energy Management Model / Reference iSEMM-WRUH CT Type Window (Through-hole) type for easy installation without disconnecting power leads Current Measurement Integrated window-type CTs Current Setting Range • Direct measurement: 0.5-60A (with integrated CTs) • With external CTs: Up to 960A (using CT with 5A secondary) Voltage Measurement Direct connection up to 690V AC (phase-to-phase) Control Voltage U: 100-240VAC/DC (wide range) Frequency 50/60 Hz (power circuit) Suitable for variable frequency drive applications (20-400Hz) Protection Functions • Overcurrent (Overload) • Undercurrent (Underload) • Phase Loss / Open Phase • Phase Reversal (Reverse Phase) • Phase Unbalance / Imbalance • Locked Rotor (Stall) at Start and Run • Earth Fault (Ground Fault) • Jamming • Mechanical jam • Short circuit protection • Overvoltage / Undervoltage • Underpower / Overpower • Reverse power • Thermal overload Energy Management Functions • Real-time power measurement (kW, kVAR, kVA) • Energy metering (kWh, kVARh, kVAh) • Power factor monitoring • Demand monitoring (current, power) • Maximum demand recording • Load profiling • Efficiency monitoring • CO₂ emissions calculation Measurement Accuracy • Current: ±1% • Voltage: ±0.5% • Power: ±1% • Energy: Class 1 (IEC 62053-21) Time Delay Settings • Start Delay (D-TIME): 0-200 seconds • Trip Delay (O-TIME): 0.2-120 seconds (definite) or 1-30 Class (inverse/thermal) • Undercurrent Trip Delay (U-TIME): 0.5-120 seconds • Earth Fault Trip Delay (E-TIME): 0.1-10 seconds • Voltage Trip Delay (V-TIME): 0.1-30 seconds Output Contact Configuration R-type: "Non-Fail-Safe" operation (contacts do not change state when relay is powered on/energized) Output Contacts Multiple independent relay outputs (typically 4) for trip, alarm, and control functions Contact Rating: 5A / 250VAC resistive Reset Mode Manual (Instant) / Electric (Remote) / Auto selectable Communication • Modbus RTU protocol, RS-485 interface (standard) • Optional: Profibus-DP, DeviceNet, Ethernet/IP Display / Indication • Large graphic LCD display for comprehensive data visualization • Real-time current, voltage, power, energy readings • Fault cause indication with detailed information • LED indicators for operational status • Trend graphs for motor parameters • Energy consumption graphs Monitoring Functions • Real-time 3-phase current display • Voltage monitoring (phase-to-phase, phase-to-neutral) • Power monitoring (active, reactive, apparent) • Energy metering (kWh, kVARh, kVAh) • Power factor monitoring • Frequency monitoring • THD (Total Harmonic Distortion) monitoring • Fault recording with cause storage (last 10 faults) • Operating time accumulation • Number of starts counter • Motor thermal capacity monitoring • Self-diagnosis function • Event logging (last 50 events) • Data logging with time stamp Mounting 35mm DIN Rail / Panel mount Special Features • High accuracy measurement (±1% current, ±0.5% voltage) • Records last 10 faults with detailed information (cause, values, time, date) • Records last 50 events • Separate display unit option available (up to 150m distance) • PC parameter setting capability via dedicated software • Restart limit function (0-10 times) • Date and time setting with real-time clock • Phase/Neutral load protection selectable • 4-20mA analog output (multiple channels) • Programmable logic functions • Custom protection curves • Energy management functions • Predictive maintenance alerts • Load shedding capability • Peak demand control • Time-of-use energy recording Standards IEC 60947-4-1, IEC 60947-4-2, IEC 62053-21 (Energy), UL, CSA, CCC Rated Operational Voltage (Ue) Up to 690V AC (direct voltage measurement) Rated Insulation Voltage (Ui) 600V AC (UL/CSA) / 690V AC (IEC) Rated Impulse Withstand Voltage (Uimp) 6 kV Degree of Protection IP20 (relay body) / Front panel sealed (IP40) Operating Temperature -20°C to 60°C Storage Temperature -30°C to 80°C Power Consumption <5W Dimensions (W x H x D) Enhanced design for DIN rail mounting (approx. 70 x 110 x 120 mm) Weight Approximately 0.5 - 0.6 kg Terminal Wiring Screw clamp terminals for solid/stranded wires (1-2.5 mm² control, up to 4 mm² power/voltage)