Overview

The ABB REF 543 Protection Feeder Terminal is engineered to safeguard and control electrical feeders in medium-voltage applications. It integrates protection, measurement, control, and communication functions into a single compact unit. The terminal supports various network configurations, including isolated neutral and resonant-earthed systems, making it highly adaptable across industries.

Moreover, the REF 543 includes programmable logic control (PLC) features that enable automation sequences and interlocking schemes. Its modular design simplifies installation and maintenance, while its robust diagnostics improve fault detection and system reliability. In addition, the terminal supports remote access and SCADA integration, enhancing visibility and operational control.

For instance, in a mining substation, the REF 543 can detect phase faults and initiate breaker trips within milliseconds, preventing equipment damage and ensuring personnel safety.

Technical Data

Typical Applications

• Substation Automation: Protects feeders and enables remote operation of breakers and switches.

• Industrial Power Systems: Monitors and controls power distribution in manufacturing environments.

• Renewable Energy Integration: Ensures protection and coordination in solar and wind power feeder networks.

• Motor Protection: Safeguards medium-sized three-phase motors from overload and faults.

• Capacitor Bank Control: Automates switching and protection for reactive power compensation units.

Therefore, the REF 543 is ideal for utilities and industries seeking reliable, scalable, and intelligent feeder protection solutions. Additionally, its compatibility with ABB’s legacy and modern systems ensures long-term support and upgrade flexibility.

FAQ

Q: What types of faults can the REF 543 detect?
A: It detects overcurrent, earth fault, phase loss, and other feeder-related anomalies.

Q: Can it be integrated into existing SCADA systems?
A: Yes, it supports multiple communication protocols for seamless SCADA integration.

Q: Is the REF 543 suitable for motor protection?
A: Absolutely. It includes protection functions tailored for medium-sized three-phase motors.

Q: Does it support automation logic?
A: Yes, the built-in PLC functions allow for custom automation and interlocking schemes.

Q: How is firmware updated?
A: Firmware can be updated via ABB’s support portal using standard communication ports.