Percentage Biased Transformer Differential Relay

87, 87N

  • Three-Phase percentage biased differential relay for two-windings transformer
  • Automatic correction of CT's mismatch and Transformer Vector Group
  • Two differential current levels
  • One restricted Earth Fault level
  • 2nd and 5th harmonic adjustable restraint levels
  • Programmable percentage bias curve
  • Oscillographic recording
  • Modbus Communication Protocol
  • UL/CSA listed