1. A 100 MVA 33 kV 3-phase generator has a subtransient reactance of 15%. The generator is connected to the motors through a transmission line and transformers as shown in Fig. E1.1a. The motors have rated inputs of 30 MVA, 20 MVA and 50 MVA at 30 kV with 20% subtransient reactance. The 3-phase transformers are rated at 110 MVA, 32 kVA/110 kV Y with leakage reactance 8%. The line has a reactance of 50 ohms and negligible resistance. Selecting the generator rating as the base quantities in the generator circuit, determine the base quantities in other parts of the system and evaluate the corresponding p.u. values. 2. Determine the fault current that would flow if a fault occurred to ground at a. The generator output b. The input to the second transformer 100 MVA 33 kV 15% 150 Fig. E1.1a www www