Description
REM545BG229AABA
Product Overview
Core Functional Features
✅ Complete rotating machine protection library
Thermal overload (49), locked rotor protection (51LR), start stall supervision (48), short-circuit instantaneous & inverse time overcurrent (50/51), stator earth fault (50N/51N), negative sequence unbalance (46), reverse phase detection, over/undervoltage (59/27), over/under frequency, loss of excitation (40), reverse power protection (32R).
✅ Built-in programmable logic control
Embedded flexible logic function blocks to implement custom interlock, sequence control and bay-level logic, reducing the demand for external auxiliary relays.
✅ Multi-channel measurement & condition monitoring
High-accuracy acquisition of three-phase current, voltage, active/reactive power, power factor, frequency, energy accumulation and harmonic data; supports RTD inputs for stator winding and bearing temperature monitoring.
Equipped with trip circuit supervision, breaker wear monitoring and internal continuous self-diagnosis.
✅ Rich I/O configuration matched with BG229AABA ordering code
Opto-isolated binary inputs, programmable Form-C relay outputs; supports local/remote switch control and alarm signal routing.
✅ Diversified communication capacity
Supports SPA bus, Modbus RTU, optional Profibus DP; IEC 61850 accessible via external communication adapter, enabling seamless data interaction with DCS, SCADA and upper monitoring systems.
✅ Front panel graphical LCD & status LED indicators
Supports on-site parameter viewing, setting modification, alarm acknowledgment and real-time fault diagnosis.
✅ Rugged hardware design
Optional conformal coating for PCB, adaptable to dusty, humid and temperature-variable control cabinet environments; standard panel flush mounting layout.
Technical Specifications
| Item | Details |
|---|---|
| Model | REM545BG229AABA |
| Manufacturer | ABB (Hitachi Energy) |
| Series | REM 540 Machine Terminal |
| Application | Medium Voltage Motors / Small & Medium Synchronous Generators |
| CT Input | 1 A / 5 A secondary configurable |
| Control Supply | Wide-range AC/DC auxiliary power |
| Mounting | Standard panel flush mounting |
| Operating Temperature | -20 ℃ ~ +60 ℃ |
| Storage Temperature | -40 ℃ ~ +85 ℃ |
| Relative Humidity | 5% – 95% RH, non-condensing |
| Protection Class | IP40 (Front), IP20 (Rear terminal area) |
REM545BG229AABA
The part number REM545BG229AABA specifies a high-performance Motor and Generator Protection and Control Relay (part of the ABB Relion / RED 500 Series, specifically the REM545 rotating machine terminal line).
Technical Specifications
| Feature | Specification |
| Manufacturer | ABB (Hitachi Energy) |
| Product Series | Relion® / REM545 Series (Numerical Protection Terminal) |
| Application | Medium-to-high voltage induction motors, synchronous motors, and small-to-medium generators |
| CT / VT Inputs | Configurable for traditional instrument transformers (1 A / 5 A CT secondary) or sensor inputs |
| Auxiliary Power Supply | Wide-range universal AC/DC power supply |
| Digital I/O | Expanded binary inputs and relay output configuration (BG hardware variant) |
| Communication Protocols | SPA bus, Modbus RTU, LON bus (for peer-to-peer busbar communication) |
| Configuration Software | ABB CAP505 / CAP501 |
| Enclosure Protection | Front IP52, Rear IP30 |
Product Overview
The REM545 is a comprehensive numerical protection relay engineered to provide complete protection, precise metering, bay control, and condition monitoring for critical rotating machinery. The BG229AABA model includes advanced hardware configurations featuring a Busbar communication module, which allows high-speed peer-to-peer data sharing with other protection relays on the same switchgear bus without needing a central controller.
Key Features:
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Comprehensive Motor & Generator Protection: Equipped with multiple dedicated ANSI protection functions, including thermal overload, locked rotor/stalling (48), phase unbalance/negative sequence (46), earth/ground faults, differential protection, and start-up supervision.
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Busbar Communication (“BG” Designation): Enables fast, deterministic data exchange over a LON or proprietary bus structure for advanced interlocking, load-shedding, and busbar-blocking schemes.
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Integrated Control & Logic: Features built-in programmable logic (PLC functionality) to handle customized circuit breaker control, interlocking schemes, and sequencing locally.
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Extensive Monitoring: Supports optional RTD inputs for continuous stator winding and bearing temperature monitoring, alongside disturbance recording, event logs, and breaker wear tracking.
