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SEL-421

Protection, Automation, and Control System

421#0301

  • TiDL-enabled relay for a digital secondary system.
  • Eight fiber ports (to connect to SEL-2240 Axion TiDL nodes) in place of the current and voltage analog inputs. Requires Axion TiDL nodes (ordered separately according to your topologies). See all available topologies in the Quick-Start Guide.
  • Distance protection plus subcycle elements and series compensation logic.
  • Power supply: 125250 Vdc or 110240 Vac.
  • 4U chassis and horizontal rack mount.
  • 8 outputs and 7 (125 Vdc) inputs.
  • Additional 8 optoisolated independent level-sensitive inputs and 8 high-speed, high-current interrupting Form A outputs.
  • Front panel with 24 target LEDs, 12 operator control pushbuttons, and tricolor LEDs.
  • Ethernet card with two 10/100BASE-FX connectors.
  • Protocols: FTP, Telnet, DNP3 LAN/WAN, and IEC 61850 Edition 2.