Fault Impedance Feature

The fault impedance feature uses a direct COMTRADE fault record from digital relays or fault recorders to plot impedance trajectories of line faults. We do this by using a Cosine or Fourier Filter to determine the actual behavior of the distance relay.

Please see below some of the features of the package:

  • Plot fault record impedance trajectories in the R-X diagram
  • Superimpose distance characteristics such as Mho circles for Zone 1, Zone 2, Zone 3
  • Plot load impedance vs. fault impedance
  • Plot load encroachment characteristics from distance relays
  • Plot swing records from relays and digital fault recorders
  • Analyze high impedance or resistive faults behavior