ABB REU615 voltage protection and control relay

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• 1. Product Overview

  The ABB REU615 Voltage Protection and Control Relay is part of the ABB Relion® 615 series, designed for comprehensive voltage protection, monitoring, and control in distribution networks.
  It provides advanced protection functions such as overvoltage, undervoltage, frequency, and unbalance protection, along with bus voltage control and automatic supervision features.
  REU615 combines reliable operation, strong communication capability, and flexible configuration to deliver efficient voltage management for modern power systems.

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  2. Technical Specifications

  Item	Specification
  Model	REU615
  Product Type	Voltage Protection and Control Relay
  Series	Relion® 615
  Rated Voltage	100 – 120 V AC / 110 – 240 V AC
  Rated Frequency	50 / 60 Hz
  Auxiliary Supply Voltage	24 – 250 V DC or 100 – 240 V AC
  Voltage Inputs	3-phase voltage + neutral voltage
  Protection Functions	Overvoltage, undervoltage, zero-sequence voltage, voltage unbalance, frequency, bus voltage control
  Control Functions	Busbar voltage control, voltage switching, automatic reset
  Communication Interfaces	IEC 61850, Modbus RTU, DNP3, IEC 60870-5-103, Profibus-DP
  Digital Inputs	8 programmable inputs
  Digital Outputs	10 programmable relay outputs
  Event Recorder	Up to 1,000 events + fault recording
  Display and Interface	3.5” graphical LCD with keypad
  Operating Temperature	-40°C to +70°C
  Protection Class	Front IP54, Case IP20
  Dimensions (H×W×D)	229 mm × 155 mm × 103 mm
  Weight	Approx. 2.5 kg
  Standards Compliance	IEC 60255, IEC 61850, EN 60255, CE Certified

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  3. Advantages & Features

  • Comprehensive Voltage Protection – Integrates overvoltage, undervoltage, and frequency protection in one device.

  • High Measurement Accuracy – Ensures precise voltage and frequency monitoring with fast response.

  • Strong Communication Capability – Supports IEC 61850 and multiple industrial protocols for seamless SCADA integration.

  • User-Friendly Interface – Built-in LCD and keypad for easy local operation and configuration.

  • High Reliability – Wide temperature range and strong EMC immunity for harsh industrial conditions.

  • Flexible Configuration – Programmable via ABB PCM600 software for customized logic and settings.

  • Event & Fault Recording – Detailed logs for event, fault, and waveform analysis.

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  4. Application Fields

  • Medium-voltage distribution networks

  • Voltage monitoring and protection in substations and power plants

  • Industrial power distribution systems

  • SCADA and power automation systems

  • Backup power and busbar control systems

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  5. Precautions

  1. Always disconnect power before installation or wiring.

  2. Verify that system voltage and wiring configuration match relay specifications.

  3. Use shielded cables and proper grounding for all signal lines.

  4. Configuration should be performed by qualified personnel using ABB PCM600 software.

  5. Periodically check operation logs and relay performance for reliable protection.

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The structure and details of the product：

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