For the system in Figure 13.13, the source voltage is 50 kV (phase value), the feeder reactive reactance X1 is 10Ω and X2 is 5Ω. The load impedance is 3∠20° kΩ. A temporary fault occurs at the location in the figure. The fault impedance is 200∠80° Ω. Compute the voltage sag at the load side. Assume the end of the feeder was unloaded before the fault.
