Power supply: 48–125 V DC
Measuring inputs: 5 CT (4×1/5 A, 1×1 A), 4 VT
Digital I/O: 24 digital inputs, 20 digital outputs
Protection functions: Motor differential (87M), thermal overload, locked rotor, earth fault, overcurrent, voltage and frequency protections
Communication: Ethernet RJ45, 2×SFP, IEC 61850 Ed.2.1, IEC 61850-9-2 LE, Modbus, DNP3
Cybersecurity: IEC 62443 Security Level 2 (SL2)
Display: 7" color touchscreen, IP54 front / IK07
Mounting: Flush or 19" rack, withdrawable design
Product Type: Motor Protection Relay
Relay Application: Motor
Model / Reference: REL52121
Mounting Size: 30TE, flush mounting
Power Supply: 48–230 V AC/DC
Measuring Inputs: 6 CT phase current, 3 CT residual current, 4 VT 100/110 V
Digital Inputs (DI): 12
Digital Outputs (DO): 14
Communication Ports: 1 front USB, 1 rear RJ45, 1 rear RS485
Communication Protocols: IEC 61850 ed.1 & 2, IEC 60870‑5-101 & 103, DNP3 TCP & RTU, Modbus TCP & RTU, EtherNet/IP, DeviceNet, SPAbus
Protection Functions: Phase overcurrent, thermal overload, earth fault, breaker failure, broken conductor detection, automatic recloser, switch‑ON to fault, inrush protection, capacitor bank unbalance, overvoltage, undervoltage, synchro‑check, underfrequency, rate of change of frequency, lockout, and more
Dimensions: Height 176 mm, Width 270 mm, Depth 230 mm
Net Weight: 4.2 kg
Front Protection Degree: IP54
