ABB REU610CVVHCNN

1. Product Overview

REU610CVVHCNN is a multi-functional voltage protection relay in the ABB Relion® 610 series, specifically designed for voltage protection. It provides protection, measurement, monitoring and fault recording functions for feeders, motors and transformers. As part of the ABB Relion® protection and control product family, this relay is mainly used for overvoltage and undervoltage protection as well as monitoring of medium-voltage distribution networks.

2. Product Features

Protection Functions

• Two-stage overvoltage protection
• Two-stage undervoltage protection
• Two-stage residual overvoltage protection
• Single-stage negative sequence overvoltage protection
• Single-stage positive sequence undervoltage protection

Technical Characteristics

• Highly integrated microprocessor design with on-chip bus (no external bus)
• Sealed chassis with maintenance-free design
• Excellent anti-interference performance, suitable for harsh environments
• Compact structure, suitable for installation in small spaces
• Continuous self-test of internal electronic components and software

3. Main Parameters

Parameter Item	Specification
Dimensions	W164 × H160 × L149.3 mm
Rated Frequency	50/60 Hz
Auxiliary Power Supply	Isolated DC/DC converter
Switch Input	2 channels (expandable to 5 channels)
Signal Output Contacts	2 channels (expandable to 5 channels)
Sampling Rate	Adjustable (waveform recording up to 5 seconds, 800Hz)
Operating Temperature	-20°C to +60°C

Communication Protocols

• SPA-bus, IEC 60870-5-103
• Modbus RTU/ASCII
• Optional DNP3.0
• Supports IEC 61850 (for some models)

4. Structure and Composition

• Plug-in design: Facilitates switchgear installation and replacement
• 2×16 LCD display: For display and parameter setting
• Digital disturbance recorder: Records voltage curves and relay signals
• Event recorder: Records operation and fault events
• Four voltage input channels: Accurate voltage measurement

5. Application Fields

• Overvoltage/undervoltage protection for distribution station busbars
• Undervoltage protection for motors
• Capacitor bank protection
• Non-discriminatory earth fault protection
• Overvoltage protection for feeders and transformers
• Automatic substation bus transfer and islanding operation
• Marine and offshore area applications (KEMA certified)

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