A 200-kVA, 480-V. 50-Hz, Y-connected synchronous generator with a rated field current | of 5 A was tested, and the following data were taken:

• OC test-Terminal voltage = 540 V at rated field current of 5 A
• SC test-Line current=312 A at rated field current of 5A
• DC test - DC voltage of 10 V applied to two terminals, a current of 20 A was measured.
• The equivalent circuit of the synchronous generator is shown in Figure QL.

(a) Calculate the speed of the generator in r/min. 

(b) Calculate the generated emf per phase.

(c) Calculate equivalent circuit parameters (armature resistance and synchronous reactance) at rated field current of 5 A.

Find the values of the armature resistance and the approximate synchronous reactance in ohms that would be used in the generator model at the rated conditions.