ABB REU-610 Voltage Relay

• 1. Product Overview

  The ABB REU-610 Voltage Relay is a protective voltage relay designed for power systems and industrial distribution applications. It monitors system voltage conditions and provides reliable response to under-voltage, over-voltage, or abnormal voltage situations.
  The relay is commonly used in low- and medium-voltage distribution systems, power plants, and industrial electrical installations, serving as an essential component for voltage protection and control logic.

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  2. Technical Specifications

  • Model: REU-610

  • Type: Voltage Relay

  • Brand: ABB

  • Monitored Quantity: AC voltage

  • Rated System Voltage: 100 V / 110 V / 220 V AC (depending on configuration)

  • Rated Frequency: 50 / 60 Hz

  • Protection Functions:

    • Over-voltage protection

    • Under-voltage protection

  • Measurement Accuracy: High accuracy with stable operation

  • Operating Time: Fast response suitable for protection circuits

  • Output Contacts: Relay output contacts

  • Contact Arrangement: 1 NO + 1 NC (typical)

  • Rated Contact Voltage: 250 V AC / 220 V DC

  • Rated Contact Current: 5 A

  • Power Consumption: Low power consumption

  • Mounting: Panel-mounted or relay rack-mounted

  • Operating Temperature: -25 to +55 °C

  • Protection Class: IP20 (installed inside control cabinets or relay panels)

  • Mechanical Life: > 10,000,000 operations

  • Electrical Life: > 100,000 operations

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  3. Key Advantages & Features

  1. Accurate Voltage Monitoring
     Sensitive and reliable response to voltage variations.

  2. Comprehensive Voltage Protection
     Supports both under-voltage and over-voltage protection.

  3. High Reliability
     Power-system-grade components ensure long-term stable operation.

  4. Strong Immunity to Interference
     Suitable for electrically noisy industrial and utility environments.

  5. Easy Integration and Maintenance
     Standard relay interfaces simplify system integration.

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  4. Typical Applications

  • Low- and medium-voltage distribution systems

  • Substation protection and control systems

  • Power plant electrical protection

  • Industrial power system voltage supervision

  • Critical equipment voltage protection circuits

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  5. Installation & Handling Notes

  1. Confirm rated voltage and frequency match the system before installation.

  2. Follow the wiring diagram strictly to avoid incorrect operation.

  3. Install in clean, dry, and well-ventilated environments.

  4. Perform periodic functional tests to ensure reliable protection.

  5. Always disconnect control power before maintenance or replacement.

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The structure and details of the product：

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