Technical Parameters Parameter Description / Value Product Designation Electronic Trip Unit - PR222MP Compatible Breaker Series ABB Tmax XT MCCBs (Frames: T4, T5, T6, T7) Trip Unit Power Supply Self-powered from line current sensors for basic protection. Requires external 24V DC auxiliary supply for full functionality (display, communication, logging, protection at very low loads). Protection Functions (Adjustable) L (Overload): Ir (0.4-1 x In), tr (delay). S (Short-time): Isd (1.5-15 x Ir), tsd (delay). I (Instantaneous): Ii (2-15 x In). G (Ground Fault): Ig (0.2-0.8 x In, or fixed mA), tg (delay). Measurement Accuracy Class 1 (per IEC 61557-12) for current and voltage. Measured Electrical Parameters Current: Ia, Ib, Ic, In Voltage: Vab, Vbc, Vca (via optional VT module) Power: P (kW), Q (kvar), S (kVA) Energy: Ep (kWh), Eq (kvarh) Other: Power Factor (PF), Frequency (Hz), %THD, Demand. Display Backlit graphical LCD. Local Interface Keypad with navigation and function keys. Standard Communication 1 x USB (Type-B) port for PC connection using ABB ETU Set software. Optional Communication Modules Plug-in modules for: • CM-MPU: Modbus RTU (RS-485) • CM-PPU: Profibus DP • CM-EPU: Ethernet (Modbus TCP) Event Recording Logs last fault events (cause, date/time, phase currents). Ambient Temperature -25°C to +70°C (operation) Standards IEC 60947-2, IEC 61557-12