5-15. The Y-connected synchronous motor whose nameplate is shown in Figure 5-21 has a per-...

5-15. The Y-connected synchronous motor whose nameplate is shown in Figure 5-21 has a per-unit synchronous reactance of 0.70 and a per-unit resistance of 0.02.

(a) What is the rated input power of this motor?

(b) What is the magnitude of E1 at rated conditions?

(c) If the input power of this motor is 12 MW, what is the maximum reactive power the motor can simultaneously supply? Is it the armature current or the field current that limits the reactive power output?

(d) How much power does the field circuit consume at the rated conditions?

(e) What is the efficiency of this motor at full load?

(f) What is the output torque of the motor at the rated conditions? Express the answer both in newton-meters and in pound-feet.