ABB REJ603 REJ603BB401NN3XE Grounding Protection Relay

The ABB REJ603 REJ603BB401NN3XE is a high-performance grounding protection relay designed for medium voltage power distribution networks. Built as part of ABB’s renowned Relion® series, the REJ603 ensures reliable protection against ground faults in solidly grounded, resistance-grounded, and isolated networks. This unit is engineered for both primary and secondary distribution systems, and it integrates seamlessly into modern digital substations using IEC 61850 communication protocols.

Its compact modular design, advanced protection algorithms, and user-friendly interface make it an ideal choice for a wide range of power system protection needs, including feeders, motors, and transformers. The REJ603 provides swift fault detection, helping minimize damage, enhance safety, and maintain operational continuity.

Product Specifications

Applications

• Distribution feeders in industrial and utility substations

• Transformer grounding protection

• Motor protection systems

• Switchgear installations

• Cable feeder protection

• Renewable energy substations (solar/wind farms)

• Metal-clad and air-insulated switchgear panels

Product Advantages

• Advanced Ground Fault Detection

  Utilizes state-of-the-art algorithms to detect high-impedance and low-impedance earth faults quickly and reliably.

• Compact and Modular

  The compact form factor enables easy retrofitting in tight panel spaces, and modular design supports flexible system integration.

• High Compatibility with Modern Grids

  Fully compliant with IEC 61850 for seamless integration into digital substations and SCADA systems.

• Built-in Monitoring and Diagnostics

  Continuous self-monitoring ensures reliability and early warning of internal malfunctions or abnormal network conditions.

• Flexible Configuration

  Through ABB’s PCM600 software, all settings, logic, and interfaces are fully programmable to match the specific requirements of any protection scheme.

• Fast Trip Response

  Minimal operating time ensures quick isolation of faulty sections to avoid damage to equipment and minimize downtime.

• Reduced Maintenance Costs

  Robust build, remote diagnostics, and event logging minimize the need for manual inspections and field interventions.

• Cybersecurity Readiness

  Equipped with modern security features including role-based access control and secure communications.

FAQ

1. Can REJ603 detect high-resistance earth faults in compensated networks?

   Yes, it uses sensitive residual overcurrent elements capable of detecting high-impedance faults.

2. Does the relay support dual CT inputs (1 A and 5 A)?

   Yes, the relay offers selectable current transformer inputs for both 1 A and 5 A systems.

3. Is there support for time synchronization via SNTP or IRIG-B?

   Yes, the REJ603 can be synchronized using both SNTP and IRIG-B inputs.

4. Can I integrate the REJ603 with ABB’s MicroSCADA or third-party SCADA?

   Absolutely. The relay supports IEC 61850, Modbus, and DNP3 protocols, which are compatible with ABB and third-party SCADA systems.

5. How is firmware upgraded in the field?

   Firmware upgrades are done via the PCM600 configuration tool through a USB or Ethernet interface.

6. What is the sampling rate of the disturbance recorder?

   The integrated disturbance recorder captures signals at 32 samples per cycle.

7. Does the relay include protection for negative-sequence overcurrent?

   Yes, the REJ603 supports protection against negative-sequence overcurrent conditions.

8. Can I configure logic schemes such as blocking or interlocking within the relay?

   Yes, the internal logic editor in PCM600 allows for user-defined logic schemes.

9. What is the minimum trip time for earth fault protection?

   The trip time can be as low as 30 milliseconds depending on the fault characteristics and settings.

10. Is redundant communication possible with dual Ethernet ports?

    Yes, certain versions of the REJ603 come with redundant Ethernet options for high availability applications.