ABB REF615 Feeder Protection and Control Relay

The REF615 is a dedicated feeder protection relay designed for utility substations and industrial power systems. It is part of ABB’s Relion® 615 series, known for its compactness, withdrawable-unit design, and compliance with IEC 61850 standards for communication and interoperability.

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Key Features

1. Comprehensive Protection:
   • Overcurrent protection (directional and non-directional).
   • Earth-fault protection (directional and non-directional).
   • Overvoltage, undervoltage, and residual voltage protection.
   • Frequency protection (overfrequency, underfrequency, rate of change).
   • High-impedance restricted earth-fault and phase discontinuity protection.
   • Optional arc fault protection for increased safety.
2. Advanced Monitoring:
   • Multifrequency admittance-based earth-fault protection for high-impedance networks.
   • Current, voltage, and power quality measurements.
   • Continuous fault and event recording.
3. Enhanced Communication:
   • Supports multiple protocols: IEC 61850 (Edition 2), Modbus, DNP3, and IEC 60870-5-103.
   • Redundant communication with HSR, PRP, and RSTP protocols.
   • Ethernet and serial interfaces (RS-485, RS-232, fiber optics).
4. User-Friendly Design:
   • Pre-configured standard configurations for ease of setup.
   • Local HMI with push buttons for control and monitoring.
   • Compatible with ABB’s PCM600 software for advanced configuration.

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Technical Specifications

Parameter	Details
Product Version	5.0 FP1
Protocols	IEC 61850, Modbus, DNP3, IEC 60870-5-103
Communication Interfaces	Ethernet (RJ45), Fiber Optic, RS-485/RS-232
Voltage Measurement	Phase and residual voltage inputs
Current Measurement	Phase current, residual current inputs
Optional Features	Arc fault protection, fault location, power quality monitoring
Operating Temperature	-25°C to +55°C
Power Supply	Auxiliary voltage: 24-250 VDC or 100-240 VAC
Protection Levels	IP54 (front), IP20 (rear)
Dimensions	Standard compact design

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Applications

• Suitable for radial, looped, and meshed distribution networks.
• Supports isolated, resistance-earthed, compensated, and solidly-earthed networks.
• Ideal for industrial power systems with distributed power generation.

For more detailed information, including configuration options, protection schemes, and technical data, please refer to the full ABB REF615 Product Guide  by browsing the uploaded PDF document.

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