Product Core Brief
- Model: ABB REM545BG229AABA
- Brand: ABB
- Series: REL545 / REL500
- Core Function: Feeder protection, monitoring, and control in MV distribution
- Product Type: Numerical protection relay (IED)
- Key Specs: 1 A / 5 A CT inputs | 110–240 V AC / 110–220 V DC auxiliary supply | IEC 60870-5-103 communication
- Condition: New Original (New Surplus)
Product Introduction
ABB REM545BG229AABA is a numerical feeder protection relay in the REL545 family, engineered for medium-voltage industrial and utility distribution networks. It provides multi-stage overcurrent, earth-fault, and thermal protection, as well as configurable interlocking, breaker failure supervision, and auto-reclose logic.
This IED integrates with SCADA systems via IEC 60870-5-103 and optional Modbus RTU, enabling event logging, disturbance recording, and remote alarm monitoring. New Surplus units are verified through rigorous QC: serial number traceability, anti-counterfeit inspection, insulation resistance (>10 MΩ at 500 V Megger), full I/O functional testing, and firmware version confirmation to ensure field-ready operation.
Frequently Asked Questions
Q: Can REM545BG229AABA be hot-swapped?
A: No. CT and VT secondaries, plus relay trip circuits, must be de-energized. Hot-swapping can destroy the relay and generate high-voltage hazards.
Q: Is this model still supported?
A: REL545 is legacy but widely deployed. ABB provides limited support and spare parts. Verify firmware and spare part stock before procurement.
Q: Will relay settings be lost during replacement?
A: Yes. Export configurations via PCM500/PCM600 or front panel backup. Photograph DIP switch positions and terminal connections to avoid misconfiguration.
Q: Are these factory-new or refurbished?
A: New Surplus. Units are fully tested: serial verification, functional I/O, insulation resistance measurement, and anti-static packaging.
