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The ABB REM545BM222BAAA is a high-performance, microprocessor-based machine protection terminal designed for comprehensive protection of medium and large-sized rotating machinery. As a specialized variant within the REM545 series, the REM545BM222BAAA provides integrated multifunction protection, advanced metering, fault recording, and communication capabilities for critical motors and generators in industrial and power generation applications .

The ABB REM545BM222BAAA serves as the main protection system for generator and generator-transformer units in small and medium-power diesel, hydroelectric, and steam power plants. Additionally, the REM545BM222BAAA protects large MV synchronous and asynchronous motors used in pumps, mills, crushers, compressors, and fans during both start-up and normal operating conditions .

Model Number REM545BM222BAAA

Series ABB Relion® 545 Series

Rated Voltage 1…72 kV (via external CT/VT)

Rated Current 1A/5A nominal (external CT)

Frequency Range 45…65 Hz

Auxiliary Power 88…265 V AC / 100…250 V DC

Trip Contacts 6×NO + 2×NC, 8A @ 250 VAC

Communication IEC 61850-8-1, GOOSE, Modbus TCP, SNTP

Sampling Rate 3.2 kHz, 16-bit A/D

Operating Temperature -40°C to +70°C (display: -20°C to +70°C)

Enclosure Rating Front IP52, Rear IP30

Dimensions 177 × 265 × 225 mm (H × W × D)

Weight 5.9 kg

Mounting Semi-flush or 19-inch rack mounting

Compliance IEC 61850-10, IEC 60255-1, CE, UL, RoHS, GOST

The REM545BM222BAAA offers extensive protection capabilities specifically designed for rotating machines:

Thermal Overload Protection (49): Real thermal replica tracking actual copper temperature with true RMS calculation, exponential cooldown curves, and block start functionality for safe motor restarting

Differential Protection (87M/87G): High-impedance or flux-balance based differential protection for internal winding short circuits in motors and generators

Underimpedance Protection (21G): Three-phase underimpedance protection with low-set and high-set stages for generator backup protection

Current Protection: Phase overcurrent (50/51), voltage-dependent overcurrent (51V), negative-sequence overcurrent (46), and instantaneous stage protection

Earth-Fault Protection: Directional/non-directional earth-fault (50N/51N/67N), restricted earth-fault (87N), and wattmetric/admittance-based options

Voltage Protection: Undervoltage (27), overvoltage (59), residual overvoltage (59N), and phase-sequence voltage protection (47)

Frequency Protection: Under/over frequency (81U/81O) with rate-of-change monitoring

Power Protection: Underpower, low-forward power, and reverse power protection (32)

Excitation Protection: Underexcitation (40) and overexcitation (24) for synchronous machines

Motor Starting Supervision (48/51LR/66): Stall protection, starts-per-hour limiting, and I²t start-up supervision 

Configuration Steps

Software Setup: Install ABB PCM600 (Ver.2.4 SP1 or later) with REM545 Connectivity Package for relay configuration and monitoring

Communication Configuration: Configure IEC 61850 GOOSE messaging or redundant Modbus TCP ports for direct connection to AC 800M or Advant controllers without protocol converters

Protection Settings: Access the hierarchical menu structure through the graphical LCD display to configure thermal overload curves, current thresholds, and time delays

Signal Matrix Programming: Utilize built-in PLC functions to create custom interlocks, alarm sequences, and automation logic

Firmware Update: Upload the latest firmware package to ensure optimal performance and cybersecurity compliance

Daily Operation

Monitor the large graphical LCD display showing real-time single-line diagrams, motor status, and estimated restart times

Use the REM545BM222BAAA built-in self-diagnostics to check relay health and communication integrity

Access event logs with 1ms timestamp resolution for detailed fault analysis and disturbance recording (up to 50 cycles waveform capture)

Pre-Installation Requirements

Mount the ABB REM545BM222BAAA in a clean, dry switchgear compartment with ambient temperature between -40°C and +70°C

Ensure minimum 150mm clearance below RJ-45 ports for GOOSE jumper cable bending without deformation

Verify that CT and VT ratios match the REM545BM222BAAA configuration (1A/5A CTs, 100V/110V VTs)

Wiring Instructions

Current Transformers: Connect phase CTs and differential protection CTs to integrated terminal blocks; the REM545BM222BAAA accepts both 1A and 5A secondaries without intermediate blocks due to transformer-isolated inputs

Voltage Transformers: Connect three-phase VT inputs (100-120V secondary) for voltage protection and measurement functions

Communication Cables: Use shielded twisted-pair cables for IEC 61850 Ethernet connections; implement PRP (Parallel Redundancy Protocol) for redundant relay configurations

Control Circuits: Connect trip and close circuits with supervision; the REM545BM222BAAA provides manual trip/close capability from the front panel

Optical I/O: Utilize optical communication interfaces for fast, disturbance-free communication in high-EMI environments

Pre-Energization Checks

Verify CT knee-point voltage complies with relay PX class specifications

Confirm 24 VDC power supply for optical inputs is floating to avoid circulating currents

Check all terminal connections for tightness and proper grounding

Validate insulation resistance >100 MΩ at 500V DC per IEC 60255-5

Hardware Verification: Confirm REM545BM222BAAA catalog number matches application requirements (motor vs. generator protection level)

Parameter Configuration: Load motor/generator nameplate data into thermal overload function; configure cooling time constants and ambient temperature settings

IEC 61850 Setup: Export CID file to 800xA system and enable IEC 61850 File Services for automatic disturbance record extraction after each trip

Protection Testing: Perform secondary injection testing for overcurrent, differential, and voltage protection elements

Communication Testing: Validate GOOSE messaging latency (<1ms) and Modbus TCP register mapping

Redundancy Testing: For parallel REM545BM222BAAA installations, verify bumpless transfer between primary and standby units

Routine Inspection (Quarterly)

Inspect the REM545BM222BAAA front panel for dust accumulation; clean the LCD display if necessary

Verify the green "Healthy" LED remains steady indicating normal operation

Check rear fan filters for dust buildup and clean as required

Verify communication cable connections and shield grounding integrity

Annual Maintenance

Review event records (stores 1000+ time-stamped events) and oscillography records

Test output contacts for proper operation (high-speed power outputs for tripping)

Verify trip circuit supervision (TCS) and close circuit supervision functionality

Check thermal model calibration against actual motor temperature measurements

Long-Term Maintenance

5-Year Cycle: The REM545BM222BAAA performs automatic capacitor ripple testing every 24 hours; replace electrolytic capacitors only if maintenance alarm indicates power supply electrolyte drift

No Battery Required: Settings stored in non-volatile memory; no battery backup needed for configuration retention

Condition Monitoring

The ABB REM545BM222BAAA provides continuous self-diagnostics including:

Circuit breaker condition monitoring (contact wear, operation time counter)

CT/VT input circuit supervision

Trip circuit supervision with trace current injection

Internal self-supervision with IRF code indication for fault identification

Password Protection: The REM545BM222BAAA features hierarchical access levels—User Level for monitoring and Technical Level (password-protected) for settings modification

Non-Volatile Memory: All settings retained without battery backup; event logs maintained during power outages

Marine Certification: The REM545BM222BAAA is certified for marine and offshore applications 

Arc-Flash Safety: Remote monitoring capabilities via IEC 61850 reduce need for front panel access during operation

Redundancy Support: Parallel two REM545BM222BAAA units via PRP Ethernet for fault-tolerant protection; standby relay mirrors settings and provides bumpless transfer if primary unit fails 

REM545BM222BAAA Standard configuration for motors and generators with 6 RTD inputs

REM545BM222CAA Higher breaking capacity version for 16A inductive loads

REM543CG226CAA Compact 5-inch version for LV motors ≤200A

REM615 Successor model to REM545 with enhanced IEC 61850 and cybersecurity features

REM630 New generation relay with built-in hidden failure monitoring and GOOSE-based zone protection

REF615 Feeder protection relay complementary to REM545BM222BAAA for complete substation protection

REU615 Voltage protection relay for busbar protection applications

RET615 Transformer protection relay for generator-transformer units

REG670 Full generator protection for machines capable of generation mode operation 

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We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.