ABB REF610 Relion 610 Feeder Protection Relay

The ABB REF610 serves as the primary REF610 feeder protection relay utilized to execute overcurrent protection, earth fault detection, circuit-breaker failure protection, and feeder control across power distribution systems. It supports configurable digital inputs and outputs, multiple communication protocols, and graphical front-panel monitoring.

Hardware Specifications

Protection Functions and Communication Interfaces

The REF610 integrates feeder protection functions for phase and earth fault conditions. Three-phase overcurrent protection includes low-set, high-set, and instantaneous stages. Additional functions cover phase discontinuity, cable thermal overload, circuit-breaker failure, and automatic reclosing.

Arc protection uses two lens sensors to detect arc-related light conditions. Sensor placement and connection must follow the applicable relay configuration and installation documentation.

The relay supports IEC 61850, Modbus RTU/TCP, and DNP3 communication. Protocol selection, addressing, and communication parameters must match the connected protection system or supervisory control network. Configurable digital inputs and outputs provide interfaces for external status signals, alarms, and control circuits.

Frequently Asked Questions

Q: What power supply voltages does the REF610 support?

A: The specified supply options are 24-250 VDC or 100-240 VAC. Confirm the exact supply configuration and terminal assignments against the device nameplate and hardware manual before energizing the relay.

Q: Which protection functions are available in the REF610?

A: Functions include three-phase overcurrent protection, non-directional earth fault protection, phase discontinuity protection, cable thermal overload protection, circuit-breaker failure protection, arc protection, and auto-reclose.

Q: Which communication protocols are supported?

A: The supplied specifications list IEC 61850, Modbus RTU/TCP, and DNP3. Confirm the supported protocol options and configuration requirements for the installed hardware and firmware revision.

Field Installation Guidelines

• Mounting: Install the relay in a compatible panel or rack cutout. Provide adequate clearance for wiring, front-panel access, and maintenance.
• Power supply: Verify the available AC or DC supply against the relay nameplate before connecting power. Observe terminal polarity for DC supplies.
• Current and voltage circuits: Wire instrument transformer circuits according to the approved protection drawings. Never open an energized current transformer secondary circuit.
• Digital I/O: Verify field signal voltage levels, contact types, and input/output assignments before connecting external control circuits.
• Arc sensors: Position and connect the two lens sensors according to the manufacturer's installation instructions and the protected compartment layout.
• Communication wiring: Use the physical interface and cable type specified for the selected protocol. Verify addressing, network settings, shielding, and grounding requirements.
• Grounding and shielding: Follow the manufacturer's grounding scheme. Route communication and low-level signal wiring separately from power and switching circuits where practical.
• Commissioning: Verify protection settings, binary I/O operation, communication status, trip outputs, circuit-breaker failure logic, and auto-reclose interlocks before placing the relay into service.