Description
3. Key Technical Specifications
- Analogue Inputs: Multiple CT (1/5 A) and VT (100 V) channels
- Auxiliary Power Supply: 110/120/220/240 V AC or 110/125/220 V DC (per configuration)
- Digital Inputs: High number (e.g., 25+ depending on exact build)
- Digital Outputs: Power and signal relays (single/double-pole)
- Protection Functions: Overcurrent, earth-fault, differential, thermal overload, voltage, frequency, reverse power, loss-of-field
- Communication: Serial protocols (check specific variant for Modbus, SPA, etc.)
- HMI: Graphic display (fixed or external)
- Operating Temperature: Standard industrial range (verify datasheet for exact)
- Enclosure: 1/2 rack or panel mount design
- Weight: Approx. 10 kg (typical for full configuration)
- Recording: Disturbance recorder and event log
4. Product Introduction
The ABB REM545BM222BAAA is a machine protection terminal from the REM 54 series. It provides integrated protection, control, measurement, and supervision for generators, generator-transformer units, and large motors in diesel, hydro, and steam power plants.
It combines selective short-circuit and earth-fault protection with machine-specific functions such as differential, underexcitation, and thermal monitoring. This terminal serves as the main protection system for rotating machinery in small to medium power applications.
- REM545BM222BAAA
- REM545BM222BAAA
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No power / dark display | Auxiliary supply failure | Low | Measure voltage at power terminals | Confirm supply matches configured range; check fuses |
| No analogue readings | CT/VT wiring or scaling error | Medium | View measured values via HMI | Verify ratios and connections against settings |
| Protection not operating | Blocked function or wrong setting group | High | Check active group and event log | Download records; confirm protection enables |
| Communication loss | Protocol or wiring mismatch | Medium | Test serial link with configuration tool | Verify baud rate, address, and cable (fiber/RS) |
| IRF or self-supervision alarm | Internal hardware issue | High | Note alarm code on display | Cycle power; retrieve diagnostic data |
| False trips on motor start | Start supervision or thermal settings | Medium | Review disturbance records during start | Adjust thermal model or inhibit times for application |
External issues cause most alarms. Provide HMI photos, event logs, and disturbance files when contacting support.
6. Frequently Asked Questions (FAQ)
Is this a new original unit? Yes, listed as New Original / New Surplus. Units come with traceability and have undergone verification testing.
Is the REM545 series still supported? It is a legacy/obsolete model. Spare parts and repairs may have limited availability. Plan for eventual migration to newer platforms like Relion 600 series.
Can this be hot-swapped? No. Isolate the machine and de-energize before removal. The terminal uses a fixed or withdrawable design depending on installation.
What protection functions does this variant include? The BM222BAAA configuration includes generator and motor protections such as overcurrent, differential, reverse power, and thermal. Confirm exact functions against your application datasheet.
How do I configure or read settings? Use ABB’s CAP 501 or corresponding configuration tools for the REM 54 series. Backup existing settings before any changes.
What is the warranty on surplus stock? 1-year functional warranty. We test units under load where possible and provide a test report. Extended options available for critical spares.
Why buy surplus for an obsolete unit? Immediate availability versus long or impossible factory lead times. All units receive full inbound inspection, functional checks on compatible test setups, and documentation. Test videos and photos available upon request. Keep spares on hand to minimize downtime on critical rotating machines.
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