ABB REB611 Busbar Protection and Control Relay

Product Overview

The ABB REB611 is a dedicated busbar protection and control relay engineered for phase-segregated short-circuit protection in modern utility substations and industrial electrical networks. As part of the Relion® 611 series, it offers reliable high-impedance busbar protection and advanced earth-fault detection for generators, motors, transformers, and reactors.

Designed with a strong focus on operational reliability and ease of deployment, the REB611 arrives with a preconfigured application package that significantly reduces engineering and commissioning time. Its compact footprint and plug-in design make it suitable for both new installations and retrofit upgrades within ABB’s COMBIFLEX system environment.

Key Features and Benefits

• High-impedance busbar protection for fast and selective fault isolation
• Phase-segregated short-circuit detection to ensure targeted tripping
• Restricted earth-fault and residual earth-fault protection for sensitive equipment
• Multipurpose backup protection for feeders, motors, and transformer circuits
• Native IEC 61850 communication, supporting Edition 1 and Edition 2 with GOOSE messaging
• Additional protocol support including IEC 60870-5-103, Modbus, and DNP3
• HSR and PRP redundancy for seamless, self-healing Ethernet networks
• Web-based configuration tools with intuitive visualization of the I/O matrix
• Local LCD HMI for convenient on-site operation
• Plug-in terminals and compact housing for fast installation and maintenance
• Ideal for both new substations and modernization projects

Technical Specifications

Protection Functions
• High-impedance busbar protection
• Phase-segregated short-circuit protection
• Restricted earth-fault protection (REF)
• Residual earth-fault protection
• Backup overcurrent and voltage-based protection functions

Communication Protocols
• IEC 61850 Edition 1 and Edition 2
• GOOSE peer-to-peer messaging
• IEC 60870-5-103
• Modbus
• DNP3
• HSR/PRP redundant Ethernet support

Inputs and Outputs
• Configurable binary inputs
• Configurable binary outputs
• Flexible signal mapping via web interface
• Supports optical or electrical Ethernet variants

User Interface and Configuration
• Local LCD display for device monitoring
• Web-based configuration environment
• Built-in I/O matrix visualization
• Plug-in connectors for simplified wiring

Standards Compliance
• IEC 61850
• IEC 60255
• IEC 61131-2

Typical Applications

• Utility substations requiring dependable single-busbar protection
• Industrial power distribution systems with high-impedance protection requirements
• Generator and transformer protection schemes
• Large motor and reactor protection in heavy industry
• Retrofit projects replacing existing protection devices with a modern digital relay