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PR222MP

The ABB PR222MP is an advanced Electronic Trip Unit (ETU) designed for ABB's Tmax XT series Molded Case Circuit Breakers (MCCBs) in the T4 to T7 frame sizes. It represents a significant upgrade from basic thermal-magnetic protection, offering a comprehensive suite of protection, measurement, and communication functions in a single, integrated unit. The "MP" suffix highlights its two core capabilities: M for advanced Measurement and energy metering, and P for Protection configurability via a front keypad.

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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