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Transformer Protection Relay


  • TiDL relay for a digital secondary system solution
  • Eight fiber ports (to connect to SEL-TMU TiDL Merging Units) in place of the current and voltage analog inputs
  • Five-terminal transformer protection with 3 REF elements, including voltage, frequency, directional overcurrent, and volts-per-hertz elements
  • Station phasor measurement unit
  • Power supply: 125–250 Vdc or 110–240 Vac
  • 4U chassis and horizontal rack mount
  • 8 optoisolated independent level-sensitive inputs (125 Vdc), 13 standard Form A outputs, and 2 standard Form C outputs
  • Ethernet card with four 10/100BASE-T connectors
  • Protocols: FTP, Telnet, Synchrophasors, DNP3, and IEC 61850