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  1. JoshuaG

    ETAP: Star-Delta increases the phase-earth fault level upstream.

    Thanks for the picture and explanation! This does certainly give me something to think about.
  2. JoshuaG

    ETAP: Star-Delta increases the phase-earth fault level upstream.

    Thanks both of you for your (astoundingly quick!) replies  @waross: You are indeed correct that when I look at all phase currents, the difference is made up by the other two phases. Does this mean that the secondary (delta) winding of T1 is being excited by the B and C phases, which is causing...
  3. JoshuaG

    ETAP: Star-Delta increases the phase-earth fault level upstream.

    Hi, I wonder if any of you could explain the phenomenon behind what is happening with my phase-earth fault currents? I’m modelling short circuit currents on ETAP, on a large 33/22/11kV network. The problem I am finding is that the phase to earth fault currents are higher when a star-delta...

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