ABB REB611 Busbar Protection and Control Relay

Product Description

The ABB REB611 is a versatile busbar protection and control relay from the Relion® 611 series. It delivers reliable phase-segregated short-circuit protection for single busbars in substations and industrial power systems. Moreover, it supports multipurpose differential protection for generators, motors, transformers, and reactors. Its preconfigured and factory-tested design reduces engineering and commissioning time, ensuring quick deployment in complex installations. The relay integrates seamlessly with ABB substation automation solutions using IEC 61850 communication protocols.

The compact plug-in design allows fast installation and convenient retrofit in existing setups. Local HMI and web-browser access enable intuitive control and monitoring. Built-in disturbance recorders, event logs, and fault records enhance system reliability and provide detailed analysis during fault conditions.

​Key Features & Benefits

• Dedicated Busbar Protection: Provides fast, selective, and reliable protection for single busbars.
• Multipurpose Applications: Supports restricted and residual earth-fault protection for motors, transformers, and generators.
• Preconfigured & Factory-Tested: Minimizes engineering time and simplifies commissioning in industrial environments.
• Advanced Communication: Complies with IEC 61850 Editions 1 and 2, offering HSR/PRP redundant Ethernet options.
• Comprehensive Monitoring: Integrated event logging and disturbance recording support fault analysis and troubleshooting.
• Compact Design: Suitable for both new installations and retrofit projects, with easy plug-in unit installation.

Technical Specifications

Protection Functions:

• Phase-segregated busbar differential
• Restricted earth-fault (REF)
• Residual earth-fault (RE)
• Backup protection

Supported Systems:

• Single busbar applications in substations and industrial power networks

Control Functions:

• Breaker and disconnector control
• Interlocking
• Automatic reclosing

Measurement & Recording:

• Current, voltage, power, frequency monitoring
• Disturbance recorder, event log, fault records

Communication Protocols:

• IEC 61850, IEC 60870‑5‑103, Modbus®, DNP3
• PRP and HSR redundancy

User Interface:

• Local HMI with LCD display
• Web-browser access

Mounting & Design:

• Width Frame: 177 mm, Case: 164 mm
• Height Frame: 177 mm (4U), Case: 160 mm
• Depth: 201 mm (153 + 48 mm)
• Weight Complete IED: 4.1 kg, Plug-in Unit: 2.1 kg

Power Supply:

Typical Applications

• Utility substation single busbar protection
• Industrial power networks with motors, transformers, and reactors
• Backup protection in multipurpose differential configurations
• Retrofit projects requiring compact, plug-in relays

Support & Reliability

ABB’s Relion® lifecycle services ensure long-term reliability. Firmware updates, calibration, and configuration support maintain high operational availability. Remote monitoring allows proactive maintenance, reducing downtime and operational risks.

FAQ

Q: Can the REB611 protect both busbars and generators? A: Yes, it provides phase-segregated busbar protection and multipurpose differential protection for generators.

Q: Does it support IEC 61850 communication? A: Yes, it fully supports IEC 61850 Editions 1 and 2, including GOOSE messaging.

Q: How fast can the relay be installed? A: The compact, plug-in design allows swift installation and retrofit in existing panels.

Q: What redundancy options are available for Ethernet? A: The relay supports HSR and PRP for high-reliability network configurations.