The figure shows the single line diagram of a sample power system, a double line to ground fault occurs on phase of b and c at the point F in the system. Find the fault current at the fault point. The machines are rated 1.2 MVA, 0.6 kV with X1=X2=0.10 PU and X0=0.05 PU. Transformers are 1.2 MVA each with leakage reactance of 0.05 PU. Transmission line reactances are XL1=XL2=0.20 PU and XL0=0.4 PU on the MVA base of machines. 
Find the fault current at the fault point.
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