The ABB REF543 Feeder Terminal Relay is a comprehensive solution designed for protection, control, and monitoring of medium voltage distribution feeders. It integrates multiple functionalities into a single device, improving system efficiency and reliability.
This relay is suitable for a wide range of distribution applications and provides dependable performance in demanding environments.
Integrated feeder protection and control
Compact and modular design
Measurement and monitoring capabilities
Flexible configuration options
Reliable and stable operation
Support for various communication interfaces

The REF543 provides essential protection functions such as overcurrent, earth fault, and voltage protection. These functions ensure safe and reliable operation of distribution feeders.
The device is designed to quickly detect faults and initiate appropriate protection actions, minimizing system disturbances.
The relay includes control functions for circuit breakers and other equipment, enabling efficient feeder management.
It also provides real-time monitoring data, including current, voltage, and system status, supporting informed decision-making.
Medium voltage distribution networks
Industrial power systems
Utility substations
Feeder automation systems
The ABB REF543KM129AAA Feeder Terminal Relay is a reliable and efficient solution for feeder protection and control, offering flexibility and performance for modern distribution systems.



