1. A 60Hz, 500MVA mathcal 22kV Y connected, solidly grounded generator is operating at rated voltage at no load. The generator is disconnected  from the rest of the system. Its reactances are X^ prime prime 4 = X_{1} = X_{2} = 0  15 and X_{0} = 0.05 per unit. 
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3. a. Find the ratio of the sub transient line current for a single line-to-ground fault to the sub  VID  transient line current for asymmetrical three-phase fault. 
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5. b. Find the ratio of the sub transient line current for a line-to-line fault to the sub-transient  current for a symmetrical three-phase fault on the generator.  
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7. c. Determine the inductive reactance in ohms to be inserted in the neutral connection of the generator to limit the sub transient line current for a single line-to-ground fault to that for a 1  3 * 6o  three-phase fault.  
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9. d. With the inductive reactance found in part e inserted in the neutral of the generator find the ratios of the sub-transient line currents for the following faults to the sub-transient line current for a three-phase fault:  1. single line-to-ground fault, 2. line-to-line fault, and  3. double line-to-ground fault.
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11. e. How many ohms of resistance in the neutral connection of the generator would limit the sub- transient line current for a single line-to-ground fault to that for a three-phase fault?