Overview

The ABB REF615C_D is an Intelligent Electronic Device (IED) from ABB’s Relion® 615 series, specifically designed for feeder protection and control in medium-voltage distribution systems. It provides rapid fault detection and isolation, protecting feeders from overcurrents, short circuits, ground faults, and abnormal voltage or frequency conditions. Its compact, withdrawable design ensures high reliability and easy maintenance in metal-enclosed switchgear, making it essential for utility substations, industrial feeders, and digital substation applications.

Technical Data

Typical Applications

• Utility Distribution Substations: Primary or backup protection for outgoing feeders.

• Industrial Power Distribution: Protection and control of large loads such as motor control centers, transformers, and switchgear.

• Distributed Generation (DG) Integration: Safe interconnection of solar, wind, or other distributed power sources.

• Digital Substations: IEC 61850 enables high-speed communication and seamless integration with modern automation systems.

FAQ: ABB REF615C_D

Q1: What does “Feeder Protection” mean?
A1: It refers to monitoring and protecting outgoing power lines (feeders) from faults. The relay isolates only the faulty section to maintain network continuity.

Q2: What benefits does IEC 61850 provide?
A2: IEC 61850 allows high-speed Ethernet-based communication, including GOOSE messaging, enabling fast, coordinated action between relays and other control devices.

Q3: What is the advantage of a withdrawable unit design?
A3: The relay can be pulled out of its chassis for maintenance or testing without disconnecting the external wiring, minimizing system downtime.