ABB REF615_1G Feeder Protection and Control Relay

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1. Product Overview

The ABB REF615_1G is a feeder protection and control relay from the ABB Relion® 615 series, designed for protection, control, measurement, and supervision of feeders in medium-voltage distribution systems.

It integrates multiple protection functions, control logic, event recording, and communication capabilities, making it suitable for utilities, industrial power systems, and infrastructure applications, while enhancing system reliability and operational safety.

2. Technical Specifications (Typical)

• Model: REF615_1G

• Type: Feeder Protection and Control Relay

• Auxiliary Power Supply:

  • 24–60 V DC

  • 110–250 V DC / AC (depending on configuration)

• Rated Current Input:

  • 1 A / 5 A selectable

• Rated Voltage Input:

  • 100 V / 110 V (phase or line voltage, configuration dependent)

• Protection Functions (Typical):

  • Overcurrent protection (instantaneous and time-delayed)

  • Earth fault protection

  • Directional overcurrent protection (optional)

  • Negative sequence current protection

  • Circuit breaker failure protection

  • Thermal overload protection

• Measurement Functions:

  • Three-phase current and voltage

  • Active and reactive power

  • Power factor

  • Frequency

• Control Functions:

  • Circuit breaker open/close control

  • Disconnector control

  • Interlocking and programmable logic

• Communication Interfaces:

  • IEC 61850

  • IEC 60870-5-103

  • Modbus (optional)

  • Ethernet interface

• Event and Fault Recording:

  • Sequence of Events (SOE)

  • Disturbance recorder

• Mounting:

  • Panel mounting

  • Switchgear embedded installation

• Operating Temperature:

  • -25 °C to +70 °C

3. Advantages & Features

✔ All-in-one functionality combining protection, control, measurement, and monitoring
✔ High reliability based on the proven Relion® platform
✔ Advanced communication supporting IEC 61850 for digital substations
✔ Flexible configuration with modular hardware and programmable logic
✔ Easy maintenance and commissioning with comprehensive event and disturbance records

4. Typical Applications

• Medium-voltage feeder protection
• Substation feeder and busbar circuits
• Industrial power distribution systems
• Utility distribution networks
• Renewable energy distribution (wind and solar)
• Infrastructure and large industrial projects

5. Installation & Operation Notes

• Correct protection settings must be applied according to system parameters before commissioning
• Proper CT/PT matching is essential for accurate protection and measurement
• Communication configuration should be verified, especially for IEC 61850 systems
• Reliable grounding of the relay and secondary circuits is mandatory
• Regular maintenance and testing are recommended to ensure correct operation