Description
Key Technical Specifications
- Product Type: Intelligent electronic device (IED) for MV switchgear
- Application: Feeder, transformer, motor protection and bay control
- Auxiliary Supply: 24–250 V DC / 100–240 V AC (typical REF542plus range)
- Frequency Rating: 50 / 60 Hz
- Current Inputs: 1 A / 5 A CT inputs (configurable depending on CT module)
- Analog Inputs: Up to 8 channels depending on configuration
- Binary Inputs: Up to 24–42 inputs depending on I/O expansion
- Binary Outputs: Up to 14–21 outputs depending on output board type
- Communication: IEC 61850, Modbus RTU, DNP3, Profibus (configuration dependent)
- Communication Ports: RS485, Ethernet (optional)
- Protection Functions: Overcurrent, earth fault, breaker failure, directional protection
- Event Recording: Disturbance recorder with fault logging (~1 kHz class sampling typical)
- Operating Temperature: -25°C to +55 / +70°C depending on revision
- Mounting: Panel-mounted bay control unit for GIS/AIS switchgear
Product Introduction
ABB REF542PLUS 1VCF750170R819 is a medium-voltage bay protection and control IED used in feeder, motor, and transformer switchgear applications. The unit integrates protection algorithms, switchgear interlocking, and local/remote control functions within a single REF542plus architecture commonly deployed in utility substations.
The controller supports IEC 61850-based station integration and legacy serial protocols, enabling retrofit into older ABB or mixed-vendor MV panels. The hardware is modular, so I/O and communication behavior depends heavily on the installed boards and firmware revision. Always verify firmware compatibility before swapping units in brownfield substations.
