Hi!

I am busy studying distribution of Fault currents through transformers, if I have a Wye solidly grounded delta transformer and I have a phase to earth fault on the secondary side of the transformer am I correct to say that Ia, Ib and Ic on the primary side will be 0?

If the secondary delta is grounded with a earthing transformer which is either a zig-zag or wye grounded delta transformer. Will the currents on the first transformers primary side remain 0 if a phase to earth fault occurs?

Any assistance will be much appreciated.

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