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Question: a 1300 kva 12000v 3phase yconnected synchronous alternator has open...

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A 1300 KVA, 12000V 3-phase Y-connected synchronous alternator has open and short circuited characteristics as shown in the following graph 1. Determine the unsaturated and saturated rated terminal voltage values of the synchronous reactance of this machine in ohms. 2. Repeat part 1 and determine these reactances in per unit with the machine rating as base. 3. A purely capacitive load is connected to this machine and at rated voltages draws a line current of 8 amps. Determine the field current under these conditions. 4. The machine is operating as in part 3, when the load is removed, what is the new terminal voltage of the alternator? 5. What is the short circuit ratio (SCR) of this machine?

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