Overview

The ABB REF620 is a compact feeder management relay designed to protect and control incoming and outgoing feeders in medium‑voltage substations.

It combines overcurrent, earth‑fault, and advanced protection functions with breaker control, monitoring, and communication capabilities.

As part of the Relion® family, the REF620 is optimized for IEC 61850 digital substations, offering scalable functionality and easy integration into modern grid automation systems.

Technical Specifications

Key Features

• Integrated protection, control, and monitoring in one compact device.

• Advanced earth‑fault protection with high sensitivity and selectivity.

• Breaker control and supervision for single or double busbar configurations.

• IEC 61850 compliance with GOOSE messaging for fast peer‑to‑peer communication.

• Redundant Ethernet options (PRP, HSR, RSTP) for high reliability.

• Large LCD display with single‑line diagram for intuitive operation.

• Scalable I/O via ABB RIO600 remote units.

Typical Applications

• Utility substations: Protecting incoming and outgoing feeders.

• Industrial power distribution: Ensuring reliable feeder protection in plants.

• Renewable energy integration: Managing feeders in distributed generation networks.

• Smart grids: IEC 61850-based digital substations requiring fast communication.

FAQ

Q1: What is the primary function of the REF620 DIS0010?
A1: It protects, controls, and supervises medium‑voltage feeders in utility and industrial networks.

Q2: Which communication protocols are supported?
A2: It supports IEC 61850, Modbus®, DNP3, and IEC 60870‑5‑103.

Q3: Does it support redundancy?
A3: Yes, it offers PRP/HSR Ethernet redundancy and RSTP ring topology.

Q4: Can it be expanded for more I/O?
A4: Yes, via ABB RIO600 remote I/O units.

Q5: Where is it typically used?
A5: In substations, industrial plants, and smart grids requiring reliable feeder protection.