The ABB REF611 is a modern feeder protection and control relay designed for medium-voltage distribution systems . It belongs to ABB’s Relion® 611 series and provides advanced protection, control, measurement, and communication capabilities in a compact, withdrawable design.
Compared with earlier generation relays, REF611 is optimized for digital substations and IEC 61850-based automation systems , making it a strong choice for utilities and industrial plants requiring high-speed fault clearing, grid reliability, and smart communication integration .
Technical Specifications (Protection, Control & Smart Grid Communication)
Parameter Details Model REF611 Brand ABB Product Type Feeder Protection & Control Relay Series Relion® 611 Series Application Medium-voltage feeder protection Protection Functions Overcurrent, earth fault, directional/non-directional protection Control Functions Circuit breaker control, switching logic Measurement Current, voltage, power, fault recording Communication Protocols IEC 61850, Modbus RTU/TCP, DNP3 Ethernet Redundancy PRP / HSR supported HMI Local LCD display + keypad Configuration Tools PCM600 software Operating Temperature -25°C to +70°C
The REF611 is designed for radial, looped, and meshed distribution networks , including systems with distributed generation.
Physical Dimensions & Weight
Item Specification Dimensions (W × H × D) ~177 × 160 × 201 mm Weight ~2.1 – 4.1 kg
The unit uses a withdrawable plug-in structure , making maintenance and replacement fast and safe.
Recommended Related Models
ABB REF615 – Advanced feeder protection relay (more functions, newer generation)
ABB REF620 – High-performance feeder protection for smart grids
ABB REM615 – Motor protection relay
ABB RET615 – Transformer protection relay
ABB COM600 – Substation automation gateway
Popular ABB Relion Series Models
ABB REF615 / REF620 feeder protection relays
ABB REM615 motor protection relay
ABB RET615 transformer protection relay
ABB REX640 advanced protection platform
ABB MicroSCADA Pro system solutions
Applications (Smart Distribution & Industrial Power Protection) The REF611 is widely used in:
Medium-voltage distribution substations
Industrial power distribution systems
Oil & gas electrical networks
Petrochemical plant feeders
Power generation auxiliary systems
Renewable energy grid integration
It is especially effective in smart grid environments requiring IEC 61850 communication and fast protection response .
Advantages (Digital Substation Ready, Fast & Reliable Protection)
Advanced feeder protection with directional and non-directional functions
Full IEC 61850 smart grid communication support
High-speed fault detection and tripping
Supports PRP/HSR redundant Ethernet networks
Compact withdrawable design for easy maintenance
Strong compatibility with digital substation systems
Suitable for complex network topologies (radial, loop, mesh)
Reliable performance in harsh industrial environments
Technical FAQs 1. What is ABB REF611 used for?
2. Is REF611 a modern relay?
3. What protection functions does it support?
4. Does it support IEC 61850?
5. What is the weight of REF611?
6. What networks can it protect?
7. Does it support redundancy?
8. What software is used for configuration?
9. Is it suitable for industrial plants?
10. Why is REF611 widely used?
Look forward to your comments! Comment
