ABB REF620E Feeder Protection and Control Relay

Product Overview

The ABB REF620E is a dedicated feeder protection and control relay designed for utility and industrial power distribution systems. It provides comprehensive protection, control, measurement, and monitoring functions for overhead lines and cable feeders in various distribution networks, including radial, looped, and meshed configurations, with or without distributed power generation. This relay is part of ABB’s Relion® product family and is known for its reliability, advanced features, and compact design.

Technical Specifications

  • Rated Current: 1A/5A (configurable)
  • Rated Voltage: 100V (line voltage)
Category:
Description
  • Operating Temperature Range: -25°C to +70°C (standard), extended options available
  • Protection Class: IP40
  • Measurement Accuracy: Current/voltage: ±0.5%
  • Action Time: ≤20ms (for instantaneous overcurrent protection)
  • Communication Interfaces: Ethernet, RS485, fiber optic (optional)
  • Supported Protocols: IEC 61850, Modbus, DNP3, IEC 60870-5-103
  • Time Synchronization: Supports IEEE 1588 V2 precision time protocol
  • Display: Color LCD with multi-language support
  • Input/Output Options: Flexible configuration with various digital and analog input/output modules

Functional Features

  • Comprehensive Protection Functions:
    • Overcurrent protection (directional and non-directional)
    • Earth fault protection with multi-frequency admittance-based methods for higher sensitivity and selectivity
    • Overvoltage/undervoltage protection
    • Voltage imbalance protection
    • Overfrequency/underfrequency protection
    • Line differential protection
    • Arc fault detection (optional)
  • Measurement Capabilities:
    • Real-time measurement of current, voltage, power factor, and energy
    • Extensive monitoring for system performance assessment
  • Advanced Communication Capabilities:
    • Supports IEC 61850 standard for seamless integration with substation automation systems
    • Enables remote monitoring and control through various communication protocols
    • Redundant Ethernet options (HSR/PRP) for enhanced communication reliability
  • Flexible Configuration:
    • Multiple standard configurations available for quick setup
    • Customizable to meet specific application requirements
  • User-Friendly Interface:
    • Intuitive HMI with multi-language support for easy operation and configuration
    • Large graphical display for showing customizable single-line diagrams (SLDs)
  • Self-Supervision and Diagnostics:
    • Continuously monitors relay hardware and software
    • Stores event logs and fault records for analysis and optimization

Application Scenarios

  • Utility Substations: Protects overhead lines and cable feeders in primary and secondary distribution substations, ensuring reliable power delivery to end-users.
  • Industrial Power Systems: Safeguards critical equipment in manufacturing plants, petrochemical facilities, and other industrial settings, preventing electrical faults from impacting production processes.
  • Renewable Energy Integration: Supports grid connection and protection for wind and solar power generation systems, facilitating the integration of renewable energy sources.
  • Smart Grids: Acts as a protection and control unit for distributed energy resources, supporting demand response and energy management in smart grid applications.
  • Infrastructure Projects: Applied in railways, airports, and data centers for reliable power distribution and protection, ensuring continuous operation of essential services.
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