ABB REF620E_F Protection Relay

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1. Product Overview

ABB REF620E_F is a feeder protection and control relay from the ABB Relion® 620 series, designed for medium-voltage distribution systems. It integrates protection, measurement, control, monitoring, and communication functions in one compact device, ensuring safe, reliable, and efficient operation of electrical networks.

2. Main Technical Specifications

• Product Series: ABB Relion® 620

• Model: REF620E_F

• Application: Medium-voltage feeder protection

• Rated Frequency: 50 / 60 Hz

• Current Inputs:

  • 1 A / 5 A (configurable)

• Voltage Inputs:

  • Phase and line voltage measurement

• Auxiliary Supply Voltage:

  • 24–250 V AC / DC (depending on configuration)

• Protection Functions (typical):

  • Three-stage phase overcurrent protection

  • Earth fault protection

  • Directional earth fault protection

  • Negative sequence overcurrent protection

  • Thermal overload protection

  • Circuit breaker failure protection

• Measurement Functions:

  • Current, voltage, frequency

  • Active and reactive power

  • Energy metering

• Communication Interfaces:

  • IEC 61850

  • IEC 60870-5-103

  • Modbus (RTU / TCP)

• Mounting Method:

  • Panel mounting

• Operating Temperature:

  • -25 °C to +70 °C

• Protection Degree:

  • Front panel IP54 (typical)

3. Advantages and Features

1. All-in-One Functionality
   Combines protection, control, measurement, and communication, reducing external devices and wiring.

2. High Reliability and Fast Operation
   Proven ABB protection algorithms ensure accurate fault detection and rapid response.

3. Smart Grid Ready
   Native IEC 61850 support enables seamless integration into digital substations and automation systems.

4. Flexible Configuration
   Protection functions, I/O options, and communication protocols can be configured to meet various application requirements.

5. User-Friendly Interface
   Clear display and intuitive keypad simplify local operation, parameter setting, and monitoring.

4. Typical Applications

• Medium-voltage feeder protection

• Industrial power distribution systems

• Utility distribution networks

• Substation automation systems

• Infrastructure projects such as railways, data centers, and airports

5. Installation and Operation Notes

1. Ensure current, voltage, and auxiliary supply ratings match the system requirements before installation.

2. Protection settings should be calculated and configured by qualified professionals.

3. Communication settings must comply with the site automation network standards.

4. Perform wiring checks and functional tests before commissioning.

5. Regular maintenance and periodic testing are recommended for long-term reliable operation.

The structure and details of the product：

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