The bus bars of a power station are in two sections A and B separated by a reactor. Connected in section A are two 12 MVA generators of 15% reactance each and to B, 8 MVA generator of reactance 10%. The reactor is rated 8 MVA and 15% reactance. Two feeders are connected to bus bar A through transformers, each rated at 4 MVA and 5% reactance. Determine the maximum short circuit MVA with which circuit breakers on the outgoing side of the transformers have to deal.

1. Impedance is the total opposition to an AC circuit caused by electric penalty tions, the tra capa multiple pacitive systema 62 Fundamentals of AC Electricity Questions for This C a. 1. Draw a diagram of an AC sine wave and identify its peak voltage and peak-to-peak voltage levels. b. 2. Explain the term frequency as it refers to AC electricity. c. 3. Discuss the difference between a load center and a fused disconnect. 2. WE wa 4. Explain how you would test for voltage in a fusible dis- connect on the line-side and load-side terminals. vi ci 5. Trace the path of a generated AC voltage from the generat- ing station where it is produced to the point where you would connect it to a machine in a factory. Be sure to iden- tify all the important parts of the system between the gen- eration station and the disconnect on the machine. a. be 3. True or False inductive reactance, capacitive reactance, and resistan 2. The units of impedance are

There are 175 slots in a 3-phase, 16-pole, 50 Hz., star connected alternator. There are 4 conductors in each slot and all the conductors in a phase are connected in series. Coil span is 130° electrical and the flux per pole is 0.04 Weber sinusoidallly distributed.    Calculate the emf induced per phase.