A 480 V, 60 Hz, Y-connected six-pole synchronous generator has a per-phase
synchronous reactance of 1.0 Ω. Its full-load armature current is 60 A at 0.8 PF
lagging. Its friction and windage losses are 1.5 kW and core losses are 1.0 kW at 60
Hz at full load. Assume that the armature resistance (and, therefore, the IR losses)
can be ignored. The field current has been adjusted such that the no-load terminal
voltage is 480 V.
a. What is the speed of rotation of this generator?
b. What is the terminal voltage of the generator if
1. It is loaded with the rated current at 0.8 PF lagging;
2. It is loaded with the rated current at 1.0 PF;
3. It is loaded with the rated current at 0.8 PF leading