ABB REU610AVVHCNN Multifunctional Voltage Relay

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1. Product Overview

The ABB REU610AVVHCNN is a multifunctional voltage relay designed for monitoring and protecting electrical systems against voltage anomalies, including overvoltage, undervoltage, phase imbalance, and phase rotation errors. It monitors three-phase voltages and provides alarm outputs or control circuit disconnection to ensure safe operation. Ideal for distribution panels, substations, and industrial equipment protection.

2. Technical Specifications

• Model: REU610AVVHCNN

• Rated Voltage: 3×230/400 V AC (three-phase, four-wire)

• Monitoring Functions:

  • Overvoltage

  • Undervoltage

  • Phase sequence / rotation

  • Phase imbalance

  • Optional zero-sequence / phase-loss detection

• Power Consumption: < 5 VA

• Output Contacts: 2 C/O or 2 A + 1 B (depending on configuration)

• Contact Rating: 250 V AC / 5 A

• Response Time: < 100 ms

• Ambient Temperature: -25℃ ~ +55℃

• Mounting: DIN rail 35 mm

• Dimensions: 90 × 17.5 × 64 mm (H×W×D)

• Protection Degree: IP20

• Reset Type: Manual or automatic

3. Key Features & Advantages

1. Comprehensive voltage monitoring — overvoltage, undervoltage, phase sequence, imbalance, and phase-loss detection.

2. Fast response — <100 ms, ensures rapid alarm or control circuit disconnection on voltage anomalies.

3. Flexible outputs — multiple contact configurations for alarm systems, contactors, or control circuits.

4. Easy installation — compact DIN rail mounting, suitable for centralized installation in distribution panels.

5. High reliability — accurate voltage detection suitable for industrial power systems with fluctuations and interference.

6. Flexible reset — manual or automatic reset for different protection requirements.

4. Typical Applications

• Industrial distribution panel voltage monitoring

• Low-voltage side protection in substations

• Voltage protection for motors and pump systems

• Automation production lines and equipment distribution networks

• Backup power and UPS system voltage monitoring

• Low-voltage distribution monitoring in wind, solar, and renewable energy systems

5. Precautions & Recommendations

1. Ensure rated voltage matches the monitored system before installation.

2. Wiring should be done with power off to ensure safety.

3. Operate within specified temperature and humidity limits; avoid damp or corrosive environments.

4. Periodically check output contacts and voltage settings for accuracy.

5. For long-term operation, periodically verify relay settings and alarm functionality.

6. Installation and maintenance should be carried out by qualified personnel.

The structure and details of the product：

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