Overview

The ABB RER 103 is a robust bus communication module designed for medium-voltage protection and control systems. It enables data exchange between Intelligent Electronic Devices (IEDs) and higher-level automation systems through fiber-optic communication, ensuring high immunity to electromagnetic interference and excellent electrical isolation.

Designed for seamless integration with ABB’s REF, REM, and RET protection relay families, the RER 103 supports both star and ring topologies, providing flexibility for various substation network architectures. Its compact footprint and convenient DIN-rail mounting simplify installation within switchgear panels. In addition, hot-swapping and automatic node addressing reduce commissioning time and support easy maintenance.

For instance, in a substation equipped with REF 543 feeder terminals, the RER 103 ensures fast and secure communication between relays and the station automation system for real-time fault coordination.

Technical Data

Typical Applications

• Substation Automation: Enables fiber-optic communication between protection relays and control systems.

• Feeder Protection Systems: Used with REF 543 and similar terminals for fast, reliable signal exchange.

• Transformer Protection: Provides interface between RET relays and SCADA/RTU systems.

• Industrial Power Distribution: Maintains communication integrity in high-EMI environments (refineries, steel plants).

• Ring Bus Architectures: Supports redundant communication paths for enhanced availability.

Therefore, the RER 103 is ideal for critical infrastructure requiring secure, high-speed, and interference-free data communication. Its modularity and compatibility with ABB’s protection ecosystem ensure long-term scalability.

FAQ

Q: What devices are compatible with the RER 103?
A: ABB REF, REM, and RET series protection relays.

Q: Can it be used in ring topology networks?
A: Yes, it supports both star and ring architectures for redundancy.

Q: What fiber types are supported?
A: Both plastic and glass fiber using ST-type connectors.

Q: Is the module hot-swappable?
A: Yes, it allows maintenance without communication downtime.

Q: How is it mounted?
A: It is designed for DIN rail installation in control panels.