Product Core Brief
- Model: ABB REM543CG212AAAA
- Brand: ABB
- Series: REL500 / REL543
- Core Function: Feeder overcurrent and earth-fault protection
- Product Type: Numerical protection relay (IED)
- Key Specs: 1 A / 5 A CT input | 110–250 V AC/DC auxiliary | IEC 60870-5-103
- Condition: New Original (New Surplus)
Key Technical Specifications
- Product Platform: ABB REL500 / REL543 series
- Protection Functions:
- 3-stage overcurrent protection (50/51)
- Earth fault / residual current (50N/51N)
- Thermal overload (49)
- Negative sequence / phase imbalance (46)
- Optional breaker failure supervision
- Current Inputs: 1 A / 5 A CT selectable
- Auxiliary Supply: 110–250 V AC/DC wide-range
- Power Consumption: ~10–15 W typical
- Binary Inputs: 6–8 configurable
- Relay Outputs: 4–6 configurable trip/alarm relays
- Communication Protocols: IEC 60870-5-103; optional Modbus RTU
- Event Logging: 100+ events with timestamps
- Fault Recording: Disturbance logging (firmware dependent)
- HMI: Front panel LEDs and navigation buttons
- Mounting: Panel / switchgear integration
- Operating Temperature: -25°C to +55°C
- Storage Temperature: -40°C to +70°C
- Compliance: IEC 60255 series, CE marking
- Firmware Version: Verify with OEM datasheet
Note: The CG212AAAA suffix defines specific hardware, I/O, and protection function configuration. Verify wiring, CT ratios, and auxiliary supply before installation.
Product Introduction
ABB REM543CG212AAAA is a numerical feeder protection relay in the REL500 series, designed for industrial and utility distribution networks. It protects feeders against overcurrent, earth faults, thermal overload, and phase imbalance, with configurable I/O and trip logic for interlocking and alarm functions.
This unit integrates easily into SCADA systems via IEC 60870-5-103 and optional Modbus RTU, providing event logging and fault recording for operational transparency. New Surplus units are fully QC-tested for functional I/O, insulation resistance (500 V Megger), and firmware integrity, ensuring field-ready reliability.
