1.　　A 5 MVA, 10 kV, 1500 rpm, 3 phase, 50 Hz, 4 pole, star connected alternator is operating on infinite bus bars. Determine the synchronizing power per mechanical degree of displacement under no-load condition. Xs = 20 .-1.　　A 5 MVA, 10 kV, 1500 rpm, 3 phase, 50 Hz,　 4 pole, star connected alternator is operating on infinite bus bars. Determine the synchronizing power per mechanical degree of displacement under no-load condition. Xs = 20　.