A generator delivers 1.0 pu power to the infinite bus ( V = 1.0 pu ) . The generator terminal voltage is 1.0 2 pu . Calculate the generator emf behind the transient reactance ( assuming the transient reactance of 0.25 pu ) . The generator is connected to the infinite bus via a transformer ( transformer reactance = 0.1 pu ) and two parallel lines ( from the transformer secondary to the infinite bus ) . The line reactance for this problem is 0.5 pu . If the generator has an inertia constant of 4 MJ / MVA , write the swing equation upon the occurrence of the fault on the second line.