The two-bus power system shown in figure (i) has one alternator supplying a synchronous motor load through a  -  transformer. The positive, negative and zero-sequence diagrams of the system are shown in figures (ii), (iii) and (iv), respectively. All reactances in the sequence diagrams are in p.u. For a bolted line-to-line fault (fault impedance = zero) between phases '  ' and '  ' at bus 1 , neglecting all pre-fault currents, the magnitude of the fault current (from phase '  ' to '  ') in p.u. is _______ (Round off to 2 decimal places).

Fig. (i) : Single-line diagram of the power system

Fig. (iii) : Negative-sequence network Fig. (ii) : Positive-sequence network

Fig. (iv) : Zero-sequence network