ABB REU610CVVHCNR02 Voltage Relay

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• 1. Product Description

  The ABB REU610CVVHCNR02 Voltage Relay is a high-precision digital voltage monitoring and protection relay designed for three-phase power systems. It provides overvoltage, undervoltage, phase sequence, and phase failure detection, with fast response, alarm outputs, and optional remote communication. It protects electrical equipment from voltage abnormalities and is suitable for distribution systems, industrial automation, motor protection, and power equipment control.

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  2. Technical Specifications

  • Model: REU610CVVHCNR02

  • Type: Digital Voltage Monitoring Relay

  • Supply Voltage: AC 110–240 V or DC 24–60 V (depending on configuration)

  • Voltage Measurement Range: AC 50/60 Hz, 100–500 V

  • Functions: Overvoltage, undervoltage, phase sequence, phase failure detection

  • Output Type: Relay output, SPDT, rated 5 A / 250 V AC

  • Response Time: < 100 ms

  • Display: LED / LCD for voltage and status indication

  • Accuracy: ±1%

  • Operating Temperature: -20 ℃ to +60 ℃

  • Storage Temperature: -40 ℃ to +70 ℃

  • Mounting: DIN rail or panel mount

  • Protection Class: IP20

  • Communication Interface: Optional Modbus RTU (RS485)

  • Standards Compliance: IEC 60255-1, CE

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  3. Advantages and Key Features

  • High-precision voltage monitoring with ±1% accuracy for reliable protection.

  • Multi-function protection including overvoltage, undervoltage, phase sequence, and phase failure detection.

  • Fast response (<100 ms) to prevent damage due to voltage abnormalities.

  • Intuitive display and operation with LED/LCD for real-time voltage and status monitoring.

  • Remote communication capability via RS485/Modbus for monitoring and data acquisition.

  • Industrial-grade design with modular construction, high temperature tolerance, and vibration resistance.

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  4. Typical Applications

  • Industrial low and medium voltage distribution systems

  • Motor and inverter voltage protection

  • Distribution panels and electrical control equipment

  • Factory automation and building electrical monitoring

  • Energy management and remote power monitoring systems

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  5. Precautions

  • Disconnect power before installation or wiring to ensure safety.

  • Select relay model according to rated voltage and application requirements.

  • Avoid exposure to high humidity, corrosive, or strong electromagnetic environments.

  • Regularly inspect relay outputs and terminal connections.

  • When using Modbus communication, ensure proper addressing and baud rate configuration to avoid conflicts.

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