Three ISMVA, 30kV synchronous generators A, B, and C are connected via three reactors to a common bus bar, as shown in the figure below. The neutrals of generators A and B are solidly grounded, and the neutral of generator C is grounded through a reactor of 2.0 Ω. The generator data and the reactance of the reactors are tabulated below. A line-to-ground fault occurs on phase a of the common bus bar. Neglect pre-fault currents and assume generators are operating at their rated voltage. Determine the fault current in phase a.
Item GA GB GC Reactor 6.0 Ω 6.0 Ω 6.0 Ω