Product Core Brief

• Model: ABB REJ601
• Brand: ABB
• Series: Relion 605
• Core Function: Feeder overcurrent and earth-fault protection
• Product Type: Numerical Protection Relay (IED)
• Key Specs: 1 A / 5 A CT Inputs | IEC 60870-5-103 | 24–250 V AC/DC Supply
• Condition: New Original (New Surplus)

Key Technical Specifications

• Product Type: Feeder protection and control relay
• Platform: ABB Relion 605 series
• Protection Functions:
  • 3-stage overcurrent (50/51)
  • 2-stage earth fault (50N/51N)
  • Thermal overload (49)
  • Negative sequence protection (46)
  • Phase imbalance and phase discontinuity protection
• Current Inputs: 1 A / 5 A CT selectable
• Earth Fault Measurement: Residual or CBCT input support
• Auxiliary Supply: 24–250 V AC/DC, wide-range input
• Power Consumption: <5 VA typical burden (device dependent)
• Digital Inputs: Configurable (binary input logic, typically 6–10 channels)
• Digital Outputs: Relay outputs configurable for trip/alarm
• Communication Protocols:
  • IEC 60870-5-103
  • Modbus RTU (optional depending on variant)
  • DNP3 (variant dependent)
• Event Logging: Up to 100 events with timestamp
• Fault Recording: Oscillography and disturbance records (COMTRADE capable variants)
• HMI: Local front-panel configuration with navigation keys
• Mounting: Panel mount / switchgear integration (compact form factor)
• Operating Temperature: -25°C to +55°C
• Storage Temperature: -40°C to +70°C
• Compliance: IEC 60255 series, CE marking
• Mechanical Design: Compact switchgear-mounted relay block

Product Introduction

ABB REJ601 is a dedicated feeder protection relay from the ABB Relion 605 series, designed for medium-voltage and low-voltage distribution systems. It provides non-directional overcurrent and earth-fault protection with integrated monitoring and control functions for circuit breakers in industrial and utility networks.

ABB REJ601 supports configurable protection curves including IEC 60255 inverse-time characteristics, enabling coordination with upstream and downstream protection devices. Its compact architecture makes it suitable for retrofit switchgear where panel space is limited. Communication via IEC 60870-5-103 allows integration into legacy SCADA systems without requiring full substation modernization.