ABB REF542PLUS 2RCA029395 Feeder Protection Terminal

The ABB REF542PLUS 2RCA029395 is a compact, microprocessor-based feeder protection terminal. It integrates protection, control, measurement, and communication functions in a single unit. Therefore, it suits medium-voltage switchgear in industrial networks, substations, and infrastructure systems. Its modular architecture and fast logic make it adaptable to both legacy and modern automation environments.

Technical Specifications

Model: REF542PLUS

Part Number: 2RCA029395

Electrical Ratings

• Rated Voltage: 110–230 V AC/DC

Protection Functions

• Overcurrent (directional and non-directional)
• Earth fault protection
• Motor protection
• Voltage-dependent tripping
• Harmonic restraint algorithms

Measurement Accuracy

• Voltage: ±0.5%
• Current: ±1%

I/O Configuration

• 16 Digital Inputs (DI)
• 8 Digital Outputs (DO)
• 4 Analog Inputs (AI)

Communication Protocols

• IEC 61850
• Modbus TCP
• Profibus DP

Display & Interface

• Graphical LCD with backlight
• Integrated HMI for local control and diagnostics

Cybersecurity

• Role-based access control
• Event logging with digital signatures

Environmental Ratings

• Operating Temperature: –25°C to +70°C
• Ingress Protection: IP54 (front), IP20 (terminals)

Compliance & Safety

• EMC & Safety: IEC 60255, UL 1053, SIL 2
• Insulation Resistance: >100 MΩ at 500 V DC
• Standards Compliance: EN 60694 + IEC 60694 AMD 12000