ABB REU615C_D Voltage Protection and Control Relay

Description

The REU615 is a voltage protection and control relay designed for voltage and frequency-based protection in utility and industrial power distribution systems, including networks with distributed power generation. It is also well-suited for voltage regulation applications.
As part of ABB’s Relion® family and the 615 protection and control series, the REU615 combines advanced protection, regulation, and communication capabilities in a compact and reliable design.

Scope

• Voltage and frequency protection

• Automatic voltage regulation of power transformers with motor-driven on-load tap changers

Features

• Designed for automatic and manual voltage regulation, as well as busbar undervoltage/overvoltage supervision, load shedding, and restoration

• Pre-engineered standard configurations for quick commissioning, with customization options

• Withdrawable plug-in unit for fast installation and testing

• Large graphical display with customizable single-line diagrams (SLDs), accessible locally or via a web-browser-based HMI

• Optional arc protection and high-speed outputs (not available with automatic voltage regulator)

• Supports IEC 61850 Editions 1 and 2, including HSR and PRP redundancy, GOOSE messaging, and IEC 61850-9-2 LE for reduced wiring and monitored communication

• IEEE 1588 V2 for precise time synchronization and optimal use of substation-level Ethernet communication

• Supports Modbus, DNP3, and IEC 60870-5-103 communication protocols

Benefits

• Wide range of voltage and frequency protection functions for busbar supervision, load shedding, and restoration

• Overfrequency and underfrequency protection for power generators and other AC equipment

• Reliable automatic voltage regulation for power transformers with on-load tap changers

• Flexible communication options for integration into modern substation automation systems

• Backed by ABB’s extensive life-cycle services