A 500-MVA 20-kV, 60-Hz synchronous generator with reactances X, = 0.15, X= 0.24; X=1.1 per unit and time constants T = 0.035, T, = 2.0, T= 0.20 s is connected to a circuit breaker. The generator is...

Extracted text: A 500-MVA 20-kV, 60-Hz synchronous generator with reactances X, = 0.15, X= 0.24; X=1.1 per unit and time constants T = 0.035, T, = 2.0, T= 0.20 s is connected to a circuit breaker. The generator is operating at 5% above rated %3D voltage and at no-load when a bolted three- phase short circuit occurs on the load side of the breaker. The breaker interrupts the fault 3 cycles after fault inception. On abase of 500MVA, 20KV. The subtransient fault current in kA rms is: Answer: I"= 101.0 kA