The ABB REU 610 is part of the Relion® 610 series, designed to provide essential protection for busbars, feeders, transformers, motors, and capacitor banks in power distribution systems. Its plug-in design facilitates quick and safe module installation and replacement, enhancing operational flexibility and efficiency.

Key Features:

• Offers two-stage overvoltage and undervoltage protection (with definite time or inverse time characteristics).
• Protects against phase-to-phase and phase-to-ground faults based on line voltage or negative sequence voltage.
• Includes breaker failure protection, trip circuit supervision, and self-hold trip signal.
• Features four AC voltage input channels selectable between 100/110/115/120V.
• Supports multi-language interfaces and password protection.
• Fault recording module with configurable sampling rates and storage for analog and digital signals.

Technical Specifications:

• Supports communication protocols such as SPA-bus, IEC 60870-5-103, and Modbus.
• Non-volatile memory for storing protection operation records, fault records, and recent trip data.
• LCD display for on-site configuration and status monitoring.
• Modular design with detachable units for easy maintenance.

Applications:

The REU 610 is versatile in applications, providing comprehensive voltage protection alongside feeder protection relays (REF 610) and motor protection relays (REM 610), forming a complete range of distribution automation protection products.

This relay employs advanced processor technology and continuous self-monitoring systems to ensure reliable operation and quick response to voltage anomalies. It supports both local and remote configuration and monitoring via serial communication interfaces.

Power Supply:

Requires a reliable auxiliary power source for operation, featuring isolated DC/DC converters and backup battery for real-time clock operation and power loss recovery.

Dimensions and Weight:

• Width: 177 mm (rack), 164 mm (casing)
• Height: 177 mm (4U rack), 160 mm (casing)
• Depth: 149.3 mm
• Weight: Approximately 3.5 kg (relay), 1.8 kg (plugin module)