ABB REF620 NBFNAAAANEA6BNN1XF Feeder Management Relay

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1. Product Overview

The ABB REF620 Feeder Relay is a feeder protection, control, and supervision relay from ABB’s Relion® 620 series. It is engineered for utility distribution networks and industrial power systems, offering integrated protection, control, measurement, and monitoring in a single intelligent electronic device (IED). Whether in radial, looped, or meshed network topologies—with or without distributed generation—REF620 delivers advanced feeder management.ABB Group

2. Technical Specifications (Typical)

Actual specifications depend on selected options and order code.

• Model: REF620

• Order Code Example: NBFNAAAANEA6BNN1XF

• Product Type: Feeder Protection and Control Relay

• Series: Relion® 620 series

• Mounting: Panel or control cabinet installation

• Auxiliary Supply Range: 24–250 V AC/DC (depending on configuration)

• Monitoring Scope: Medium/low voltage feeder circuits

• Protection Functions:

  • Time and instantaneous overcurrent protection

  • Negative sequence overcurrent

  • Voltage protection and metering

  • Phase step distance protection

  • Fault detection and location

  • High impedance (HIZ) fault detection

  • Sensitive earth fault (SEF) protection

• Auto-reclose: Multi-shot three-phase autoreclose

• I/O Channels: Configurable digital and analog I/O

• Communication Protocols: IEC 61850, Modbus, DNP3, IEC 60870-5-103

• User Interface: Large LCD with customizable single line diagram

• User Access Control: Four-level role-based authentication

• Time Sync Support: SNTP, IEEE 1588 v2, IRIG-B

• Operating Temperature: Typically -25 °C to +55 °C

• Standards Compliance: Supports IEC/IEEE protection and communication standards.ABB 图书馆

3. Key Advantages & Features

• Comprehensive Protection & Control – Integrates multiple protection functions for feeder circuits.ABB 图书馆

• Flexible Configurability – Hardware and I/O options tailored to application needs.

• Advanced Fault Detection & Localization – High impedance and sensitive earth fault detection enhance system visibility.ABB 图书馆

• Standardized Communication – Supports IEC 61850 and industry-standard protocols for seamless automation integration.ABB 图书馆

• User-Friendly Operation – Intuitive LCD HMI and programmable controls simplify local operation.ABB 图书馆

• Modular & Reliable Design – Robust Relion® platform with plug-in units for easy serviceability.ABB Group

4. Typical Applications

The REF620 relay is commonly used in:

• Utility and industrial feeder protection and control

• Distribution automation systems

• Integration with substation SCADA and automation

• Distributed generation grid connection protection

• Network reconfiguration and automated reclose schemes

• Fault analysis and feeder event logging

It supports a range of network topologies including radial, looped, and meshed systems.ABB 图书馆

5. Installation & Usage Notes

• Correct Selection & Settings – Match relay configuration with system voltage, current, and protection requirements.

• Power Supply & Grounding – Ensure correct auxiliary supply wiring and grounding per electrical standards.

• Network Communication Setup – Configure communication for compatibility with master systems.

• Periodic Testing – Validate protection logic, communications, and reclosing performance.

• Environment Conditions – Install in controlled environments free from excessive dust, moisture, or interference.