A 15-MVA, three-phase, 6.6-kV generator with subtransient reactance X′_′d = 15% feeds a three-phase, 1-MVA, 6.6-kV/480 V transformer with X_trfr = 7% via cable that has a leakage reactance X_cable = 2.2 mΩ/phase as shown in the figure below. Neglecting all resistances, determine the symmetrical rms value and the worst-case first offset peak of the fault current for a three - phase fault at the transformer output terminals using: 

(1) Reactance values in percent and

(2) All reactance values in ohms.

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Xcable= 2.2 m2/ph 15 MVA, 6.6 kV, Xä = 15% 事 1 MVA, 6.6 kV/ 480 V, Xtrfr= 7%