ABB REM545BG226BAAA Relion 545 Series Motor Protection and Management Relay
ABB REM545BG226BAAA Relion 545 Series Motor Protection and Management Relay - Image 2
ABB REM545BG226BAAA Relion 545 Series Motor Protection and Management Relay - Image 3
ABB REM545BG226BAAA Relion 545 Series Motor Protection and Management Relay - Image 4

ABB REM545BG226BAAA Relion 545 Series Motor Protection and Management Relay

  1. REM545BM222BAAA — Relion 545 motor protection relay with IEC 61850 GOOSE and Modbus TCP communication.
  2. REM545AG228AAAA — Relion 545 machine protection terminal for motors and generators.
  3. REM543CG226CAA — Compact 5-inch motor protection relay for motors up to 200 A.
  4. REM610 — Dedicated motor protection relay for industrial MV/LV applications.
  5. REF545 — Feeder protection terminal for MV distribution networks.
  6. RET545 — Transformer protection terminal in the Relion 545 family.
  7. REU615 — Voltage protection relay for busbar and voltage monitoring applications.
  8. REG670 — Generator protection relay for full generator differential and backup protection.
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Description

ABB REM545BG226BAAA Relion 545 Series Motor Protection and Management Relay

Product core overview
The REM545BG226BAAA is an ABB Relion 545 series motor protection relay designed for medium-voltage synchronous and asynchronous motors. It integrates protection, measurement, control, condition monitoring, and communication functions in a single device. The relay provides advanced motor protection including thermal overload, overcurrent, ground fault, unbalanced load, voltage/frequency protection, and motor start supervision, making it suitable for critical pumps, fans, compressors, mills, and process drives in industrial power systems.

The suffix code BG226BAAA defines the hardware and option configuration. Because the exact meaning of each character in the order code is not publicly documented in the available references, the specific auxiliary voltage, I/O count, communication protocol, and RTD module options should be confirmed against the ABB nameplate or order confirmation before commissioning.

REM545BG226BAAA

Key technical specifications

Item Typical information
Manufacturer ABB
Product family Relion 545 Series
Model code REM545BG226BAAA
Application Medium-voltage motor and generator protection
Rated voltage Up to 72 kV system via external CT/VT
CT input 1 A / 5 A nominal
Frequency range 45–65 Hz
Auxiliary supply Typically 88–265 V AC / 100–250 V DC for REM545 variants
Communication Modbus, IEC 61850, SPA/LON depending on configuration
Protection functions 50/51, 49, 46, 27/59, 37, 38, 48/51LR, 66, 78, 81O/U, ground fault, thermal overload
Operating temperature -40°C to +70°C
Enclosure Panel/19-inch rack mount; front IP52, rear IP30 typical
Standards IEC 60255, IEC 61850, CE, UL, RoHS

Exact trip contact configuration, binary I/O count, RTD inputs, communication ports, and firmware capabilities must be verified from the ABB datasheet matching the BG226BAAA order code.

 

Recommended ABB same-family / related models

  1. REM545BM222BAAA — Relion 545 motor protection relay with IEC 61850 GOOSE and Modbus TCP communication.
  2. REM545AG228AAAA — Relion 545 machine protection terminal for motors and generators.
  3. REM543CG226CAA — Compact 5-inch motor protection relay for motors up to 200 A.
  4. REM610 — Dedicated motor protection relay for industrial MV/LV applications.
  5. REF545 — Feeder protection terminal for MV distribution networks.
  6. RET545 — Transformer protection terminal in the Relion 545 family.
  7. REU615 — Voltage protection relay for busbar and voltage monitoring applications.
  8. REG670 — Generator protection relay for full generator differential and backup protection.

 

Professional quality control test SOP

  1. Incoming inspection
    Verify model REM545BG226BAAA, serial number, order code, auxiliary voltage rating, accessories, and certificate of conformity. Confirm the order code matches the project specification.
  2. Visual and mechanical inspection
    Check enclosure, display, terminal blocks, communication ports, mounting brackets, and nameplate. Ensure no moisture, corrosion, cracked connectors, or damaged terminals.
  3. Power-up test
    Apply the specified auxiliary supply voltage. Confirm correct polarity, display startup, LED indication, and absence of abnormal heating or alarm.
  4. Configuration verification
    Download and verify relay settings, including CT/VT ratios, motor nameplate data, thermal model parameters, protection thresholds, and I/O mapping.
  5. Protection function test
    Test overcurrent, thermal overload, ground fault, negative sequence, undervoltage/overvoltage, under/overfrequency, and motor start supervision functions using secondary injection.
  6. I/O channel validation
    Verify binary inputs, trip outputs, alarm outputs, and RTD/analog inputs if equipped. Confirm correct operation and signal mapping.
  7. Communication test
    Verify Modbus, IEC 61850, SPA, or LON communication as configured. Confirm IP address, data mapping, GOOSE messaging if applicable, and SCADA/DCS integration.
  8. Trip and alarm simulation
    Simulate fault conditions and confirm trip timing, alarm messages, event recording, and fault report generation.
  9. Final documentation
    Record test results, firmware version, configuration backup, serial number, and acceptance status. Archive the relay setting file.

 

Application scenarios and features

  • Power generation auxiliaries
    Protects boiler feed pumps, induced draft fans, cooling water pumps, and other critical MV motors in thermal and combined-cycle power plants.
  • Oil, gas, and petrochemical
    Used for compressor, pipeline pump, and process motor protection where unplanned trips can halt entire production lines.
  • Metallurgy and steel
    Protects rolling mill motors, fan drives, and heavy-duty process motors subject to high torque and thermal stress.
  • Cement and mining
    Applied to mill drives, crusher motors, conveyor drives, and ventilation fans in harsh industrial environments.
  • Water and wastewater
    Protects large pumping motors in municipal and industrial water treatment facilities.
  • Marine and offshore
    Suitable for offshore platform motor protection when configured with appropriate certification options.

Key features

  • Comprehensive MV motor and generator protection
  • Thermal overload model based on true motor heating characteristics
  • Motor start supervision and locked rotor protection
  • Voltage, frequency, and power-based protection functions
  • Programmable logic for customized control sequences
  • Multiple communication protocol options including IEC 61850
  • RTD input support for stator and bearing temperature monitoring
  • Wide operating temperature range for harsh environments

 

FAQ

What is the REM545BG226BAAA?
It is an ABB Relion 545 series motor protection relay configured with the BG226BAAA order code. It provides comprehensive protection, measurement, control, and monitoring for medium-voltage motors.

What does the BG226BAAA suffix mean?
The suffix defines the relay’s hardware configuration, including auxiliary voltage, I/O modules, communication options, and RTD inputs. The exact configuration should be confirmed from the ABB nameplate or order documentation.

Can REM545BG226BAAA replace REM545BM222BAAA?
Both belong to the Relion 545 motor protection family, but the suffix codes indicate different configurations. Substitution requires verification of auxiliary voltage, I/O count, communication protocol, and protection settings.

What communication protocols are supported?
Depending on configuration, REM545 supports Modbus, IEC 61850, SPA bus, and LON bus communication.

What is the operating temperature range?
The typical operating temperature range is -40°C to +70°C, with display operation from -20°C to +70°C.

Does it support RTD temperature monitoring?
Yes. REM545 supports optional RTD/mA I/O modules for stator winding, bearing, and ambient temperature monitoring.

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