Product Core Brief
- Model: ABB REM601CE446NC1NH
- Brand: ABB
- Series: REL601 / REL600
- Core Function: Feeder overcurrent, earth-fault, and thermal protection
- Product Type: Numerical protection relay (IED)
- Key Specs: 1 A / 5 A CT inputs | IEC 60870-5-103 communication | 110–250 V AC/DC auxiliary supply
- Condition: New Original (New Surplus)
Product Introduction
ABB REM601CE446NC1NH is a numerical feeder protection relay in the REL601 family, designed for medium-voltage feeders in industrial and utility distribution systems. It integrates multi-stage overcurrent, earth-fault, thermal overload, and negative-sequence protection, with configurable interlocking and breaker failure supervision.
The relay communicates via IEC 60870-5-103 for SCADA integration and optionally supports Modbus RTU for monitoring and control. New Surplus units are rigorously QC-tested: serial number verification, insulation resistance testing (>10 MΩ at 500 V Megger), full functional I/O testing, and firmware verification, ensuring reliable field performance.
Frequently Asked Questions
Q: Can REM601CE446NC1NH be hot-swapped?
A: No. All CT/VT secondaries and trip circuits must be de-energized. Hot-swapping risks permanent damage and dangerous CT secondary voltages.
Q: Is this model still supported?
A: REL601 is legacy but supported for installed bases. ABB provides firmware updates and spare parts based on NC1NH configuration.
Q: Will I lose settings during replacement?
A: Yes, unless parameters are backed up. Use PCM500/PCM600 export or front-panel backup. Document all DIP switch positions and terminal wiring.
Q: Are these factory-new or refurbished?
A: New Surplus. Units are verified with serial traceability, anti-counterfeit inspection, insulation resistance tests, and I/O functional testing.
