Product Core Brief

• Model: ABB REJ601 BD446NC1NH
• 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 selectable | 24–265 V AC/DC supply | IEC 60870-5-103
• Condition: New Original (New Surplus)

Key Technical Specifications

• Product Platform: ABB Relion 605 feeder protection family
• Order Code Structure: BD446NC1NH (hardware + I/O + comm configuration variant)
• Protection Functions:
  • 3-stage overcurrent (50/51)
  • 2-stage earth fault (50N/51N)
  • Thermal overload (49)
  • Phase imbalance / negative sequence (46)
  • Phase discontinuity supervision
• CT Inputs: 1 A / 5 A software selectable
• Auxiliary Supply: 24–265 V AC/DC wide-range input
• Power Consumption: ~5–10 W typical (application dependent)
• Binary Inputs: Typically 6–10 configurable inputs (variant dependent)
• Relay Outputs: Trip + alarm outputs, configurable SPDT/NO/NC logic
• Communication Protocols:
  • IEC 60870-5-103 (primary)
  • Modbus RTU (variant dependent)
• Event Logging: Up to ~100 events with timestamp (firmware dependent)
• Fault Recording: Disturbance recording with COMTRADE support (variant dependent)
• HMI: Front panel navigation with parameter set access
• Mounting: Flush panel mount / switchgear door integration
• Operating Temperature: -25°C to +55°C
• Storage Temperature: -40°C to +70°C
• Compliance: IEC 60255 series, CE marking

Important decoding note:
The suffix BD446NC1NH defines CT range, communication option, binary I/O mapping, and auxiliary supply configuration. ABB does not publish full public decoding tables; verify against ordering code sheet before replacement.