Product Core Brief

• Model: ABB REL511 1MRK003492-AL
• Brand: ABB
• Series: REL 500
• Core Function: Feeder overcurrent and earth-fault protection
• Product Type: Numerical protection relay (IED)
• Key Specs: 1 A / 5 A CT input | 110–250 V AC/DC supply | IEC 60870-5-103 support
• Condition: New Original (New Surplus)

Key Technical Specifications

• Product Type: Numerical feeder protection relay (IED)
• Platform: ABB REL 500 series
• Protection Functions:
  • 3-stage overcurrent (50/51)
  • 2-stage earth fault (50N/51N)
  • Thermal overload (49)
  • Negative sequence / phase imbalance (46)
  • Phase discontinuity monitoring
• Current Inputs: 1 A / 5 A CT selectable
• Auxiliary Supply: 110–250 V AC/DC wide-range
• Power Consumption: ~10–15 W typical
• Binary Inputs: 6–8 configurable
• Relay Outputs: 4–6 configurable trip/alarm relays
• Communication Protocols: IEC 60870-5-103; optional Modbus RTU
• Event Logging: 100+ events with timestamps
• Fault Recording: COMTRADE capable (firmware dependent)
• HMI: Front panel LEDs and parameter navigation
• Mounting: Panel / switchgear integration
• Operating Temperature: -25°C to +55°C
• Storage Temperature: -40°C to +70°C
• Compliance: IEC 60255 series, CE marking
• Firmware Version: Confirm with OEM datasheet; often 1.x–2.x series for REL500

⚠️ Note: 1MRK003492-AL defines hardware and I/O configuration for REL511. Verify wiring and auxiliary supply before installation.