Description
Key Technical Specifications
- Product Type: Multifunction feeder protection and control IED
- Application: Medium-voltage switchgear (RMU, GIS, AIS panels)
- 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: 100–230 V AC nominal (configuration dependent)
- Protection Functions: Overcurrent, earth fault, breaker failure, motor protection, thermal logic
- Control Functions: Breaker open/close, interlocking logic, auto-reclose sequences
- Communication Protocols: IEC 61850 (GOOSE/MMS), Modbus RTU/TCP, DNP3, Profibus DP
- Binary Inputs/Outputs: Typically 8–16 inputs, 4–8 outputs depending on I/O card variant
- HMI Interface: Integrated LCD with keypad and event navigation
- Event Recording: Disturbance recorder with fault logs and time stamping
- Mounting: Panel-mounted bay control unit for switchgear cubicles
- Operating Temperature: −25°C to +70°C
Product Introduction
ABB REF542PLUS 2RCA029395 is a multifunction medium-voltage protection and bay control IED used in feeder, transformer, and motor protection applications. It combines protection algorithms, measurement, interlocking logic, and substation communication into a single modular platform widely deployed in utility distribution systems.
ABB REF542PLUS 2RCA029395 integrates IEC 61850-based station communication and legacy serial protocols, enabling retrofit into older ABB switchgear without full panel redesign. In field commissioning, wiring integrity, CT polarity, and firmware alignment dominate system reliability more than the relay hardware itself.
