ABB REU610 Supervision Relay

Product Overview

The ABB REU610 is a specialized voltage protection relay designed for the supervision of distribution substation busbars, feeders, and power transformers. As a member of the Relion® 610 series, it excels in applications requiring over-voltage and under-voltage protection, motor under-voltage monitoring, and capacitor bank supervision.

Technical Specifications

• Manufacturer: ABB

• Series: Relion 610 (Voltage Protection)

• Protection Functions:

• Two-stage Overvoltage Protection ($U>$, $U>>$)

• Two-stage Undervoltage Protection ($U<$, $U<<$)

• Two-stage Residual Overvoltage Protection ($U_0>$, $U_0>>$)

• Negative Phase-Sequence Overvoltage OR Positive Phase-Sequence Undervoltage (Mutually exclusive)

• Design: Removable plug-in unit for rapid maintenance

• Certifications: KEMA Type Test certified; DNV certified for marine and offshore use

• Communication: Supports IEC 61850, Modbus, Profibus, DNP3, SPA, LON, and IEC 60870-5-103

• Mounting: Compact design for panel integration or retrofit

Key Features & Engineering Advantages

• Versatile Supervision: Beyond simple tripping, the REU610 is an essential tool for initializing automatic busbar changeovers and disconnecting small power units from public networks during islanding events.

• Maintenance Efficiency: The plug-in hardware design facilitates the commissioning of switchgear and enables the safe withdrawal of the relay unit without disturbing the fixed wiring, significantly reducing Mean Time to Repair (MTTR).

• Maritime Ready: With its DNV certification, the REU610 is a trusted component for off-shore platforms and marine vessels where vibration resistance and high reliability are mandatory.

• Flexible Protection Logic: The inclusion of selectable phase-sequence protection allows engineers to tune the relay for specific sensitive applications, such as identifying voltage unbalances that could damage motors.

• Broad Connectivity: Its support for virtually every major industrial protocol ensures that the REU610 can be integrated into legacy SCADA systems or modern digital substations.