Description
Key Technical Specifications
- Product Type: Numerical protection and bay control IED
- Application: MV switchgear for feeder, transformer, and motor protection
- System Voltage Class: 3–36 kV typical MV distribution systems
- Auxiliary Supply: 24–250 V DC / 100–240 V AC (variant dependent)
- Frequency Rating: 50 / 60 Hz
- CT Inputs: 1 A / 5 A configurable secondary inputs
- VT Inputs: Nominal 100–110 V AC
- Binary Inputs: Up to 42 depending on configuration
- Binary Outputs: Up to 18–21 relay outputs
- Analog Inputs: Up to 6–8 channels depending on module
- Protection Functions: Overcurrent, earth fault, directional protection, breaker failure, auto-reclose
- Measurement Functions: Current, voltage, frequency, power, energy
- Communication Protocols: IEC 61850, Modbus RTU/TCP, DNP3, SPA
- Event Recording: Disturbance recorder with pre/post fault capture
- Mounting: Panel-mounted bay control unit
- Operating Temperature: -25°C to +70°C
Product Introduction
ABB REF542PLUS 1VCR007346 G0004 is a medium-voltage feeder protection and bay control IED designed for industrial and utility switchgear applications. The device integrates protection, monitoring, interlocking logic, and communication functions within the modular REF542plus platform.
This unit supports IEC 61850 integration and legacy serial protocols, making it suitable for retrofit or expansion in existing ABB or mixed-vendor MV panels. In practice, commissioning success depends on proper CT/VT verification, correct wiring, and firmware alignment rather than the relay hardware itself.
