ABB REF615A | Relion 615 Series | Feeder Protection and Control Relay

Product Overview

The REF615A is a member of the ABB Relion® 615 series, specifically engineered for the protection, control, and supervision of feeder lines in utility and industrial power distribution systems. Designed for medium-voltage networks, this Intelligent Electronic Device (IED) supports radial, looped, and meshed topologies, including grids with distributed generation. The REF615A features a distinctive withdrawable plug-in design, which simplifies maintenance and ensures minimal downtime during testing or replacement. Its native support for IEC 61850 allows for high-speed GOOSE messaging and seamless integration into modern substation automation architectures.

Technical Specifications

The REF615A utilizes advanced digital signal processing to deliver high-accuracy measurements and reliable trip logic.

• Manufacturer: ABB

• Model: REF615A

• Product Series: Relion® 615 Series

• Primary Function: Feeder Protection, Control, and Monitoring

• Protection Features: Non-directional/directional overcurrent, earth-fault protection, over/undervoltage, frequency protection, and breaker failure.

• Control Capabilities: Switchgear status monitoring, interlocking, and auto-reclosing (for overhead lines).

• Communication Protocols: IEC 61850-8-1 (MMS/GOOSE), Modbus TCP/RTU, DNP3, SPA, LON.

• Hardware Design: Withdrawable plug-in unit with pre-calibrated current/voltage inputs.

• Power Supply Options: 24–48 VDC or 110–240 V AC/DC (Standard variant dependent).

• Input/Output: Configurable binary inputs and outputs with high-speed power output options.

• Operating Temperature: -40°C to +55°C (Extended short-term limit up to +85°C).

• Display: Large graphical HMI with customizable mimic diagrams and local control buttons.

• Protection Class: IP54 (Front panel); IP20 (Rear terminals).