A 60 MVA, Y connected 11 kV synchronous generator is connected to a 60
MVA, 11kV/132 kV Delta/Y transformer. The sub-transient reactance of the
generator is 0.12 pu on a 6OMVA base, while the transformer reactance is
0.10 pu. on the same base. The Gris unloaded when a symmetrical fault is
suddenly placed at end of the Tr. Find the sub-transient fault current in pu
with the Gr voltage at no load as 1.0 pu.
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