Description
Key Technical Specifications
- Product Type: Numerical feeder protection and bay control IED
- Application: Medium-voltage distribution switchgear (feeder, transformer, motor protection)
- Functional Scope: Protection, measurement, monitoring, control, self-diagnostics
- System Integration: Compatible with ABB substation automation and third-party SCADA systems
- Auxiliary Supply: 24–250 V DC / 48–240 V AC (variant dependent)
- Frequency Rating: 50 / 60 Hz
- CT Inputs: 1 A / 5 A configurable secondary inputs
- VT Inputs: 100 V / 110 V nominal (configuration dependent)
- Protection Functions: Overcurrent, earth fault, undervoltage, breaker failure
- Control Functions: Remote/local breaker and switchgear operation
- Communication Protocols: IEC 61850, Modbus, DNP3, PROFIBUS (variant dependent)
- HMI Interface: Integrated LCD + keypad for local operation
- Event Recording: Fault recording and disturbance logging
- Mounting: Flush-mounted switchgear door installation
- Operating Temperature: −25°C to +70°C (typical industrial range)
Product Introduction
ABB REF542PLUS 1VCR007346 G0004 is a multifunction medium-voltage protection and bay control IED used in feeder, transformer, and motor protection applications. The platform integrates measurement, protection, monitoring, control, and self-diagnostics into a single switchgear-mounted device, commonly deployed in utility and industrial substations.
The REF542plus architecture supports integration with SCADA and substation automation systems through multiple communication protocols, enabling retrofit use in legacy and mixed-vendor installations. In field practice, system reliability depends more on CT/VT wiring accuracy, firmware alignment, and correct configuration backup than on the relay hardware itself.
