ABB REM545BM222BAAA Integrated Numerical Protection Relay for Motor & Generator

Product Description

REM545BM222BAAA belongs to ABB classic Relion 545 series machine dedicated protection terminal, officially discontinued in 2022ABB Group. It is specially developed for medium-voltage 

large asynchronous/synchronous motors and small & medium generator sets (hydro, steam, diesel generator units), integrating full protection logic, breaker control, electrical measurement, 

fault recording and programmable logic control all-in-one.

This full model variant BM222BAAA defines I/O configuration, RTD temperature access, communication interface and mounting mode. With large-capacity fault wave recording, event sequence 

SOE logging, built-in PLC function block programming, support for IEC61850 digital substation protocol. Panel flush embedded installation, conformal coated circuit board, widely used as critical 

replacement spare for power plants, mining mills, large water pump units, chemical plant heavy-load motor protection cabinetsABB Group.

Technical Specifications

Full Model: REM545BM222BAAA

Brand: ABB, Origin: Switzerland

Application Scope: MV high-power motor, generator and generator-transformer group comprehensive protection

CT Input: 1A / 5A switchable rated secondary current

VT Input: 100V voltage transformer signal

Auxiliary Power Supply: 88–265VAC / 100–250VDC wide-range dual power supply

Analog Inputs: Multi-channel CT/VT sampling + multi-point 3-wire RTD temperature detection (Pt100, Ni sensors)

Digital I/O: 25 isolated digital inputs, 18 programmable relay output contacts

Communication Protocols: IEC 61850-8-1, GOOSE, Modbus TCP, SPA bus, SNTP time synchronization

Sampling Performance: 3.2kHz sampling rate, 16-bit high-precision AD conversion

Protection Standard: Fully compliant IEC 60255 international relay standard

Protection Grade: Front panel IP54, rear wiring terminal IP20

Working Ambient Temperature: Operating -20℃～+70℃; storage -40℃～+70℃

Humidity: 5%–95% non-condensing, PCB with anti-moisture conformal coating

Installation: Cabinet flush semi-embedded mounting / 19-inch standard rack mounting

Overall Dimension: 177(H) × 265(W) × 225(D) mm

Net Weight: 5.9kg

Certifications: CE, IEC61850, marine offshore certification, EMC anti-interference certification

Core Protection Functions (ANSI Standard Code)

Overcurrent & directional overcurrent: 50/51, 67 three-stage segment protection

Earth fault & directional earth fault: 50N/51G, 67N residual current protection

Thermal overload protection: 49 motor stator/bearing overheat protection via RTD

Negative sequence unbalance protection: 46 phase loss, three-phase current imbalance

Generator differential protection: 87G stable ratio differential short-circuit protection

Voltage abnormal protection: 27 undervoltage, 59 overvoltage two-stage locking

Frequency abnormal protection: 81O/U overfrequency/underfrequency five-stage protection

Motor startup supervision: 48 stall locked rotor, 66 cumulative startup count limit

Reverse power/motoring protection: 32R generator reverse power anti-motoring

Low impedance protection 21, overexcitation 24, PT disconnection alarm 60, breaker failure protection etc.eero

Key Features

Ultra-full rotating machine dedicated protection library, covering electrical faults, thermal overload, abnormal operation states of motors and generators.

Built-in graphical programmable PLC logic function, free custom interlock logic without additional auxiliary relay.

Complete fault recording & SOE event sequence recording, waveform playback for post-fault root cause analysis.

Supports IEC61850 digital substation communication, seamless docking with SCADA and power plant DCS monitoring system.

Multi-point RTD temperature access directly monitors motor bearing, stator winding temperature, realizing early over-temperature pre-alarm.

Large quantity of configurable DI/DO points, realizes breaker remote tripping, signal alarm, position feedback and interlock control.

Front LCD man-machine interface, on-site parameter setting, protection curve checking, real-time electrical quantity viewing and fault code inquiry.

Rugged industrial hardware, anti-vibration, anti-humidity and anti-corrosion coating, long-term stable 24/7 continuous operation in harsh substation environments.