(i) A three-phase, star-connected, 5 kVA, 50 Hz, four-pole alternator has the following test data at rated speed: (iii) Armature resistance per phase is 2.0 Ω. (a) Draw the OC and SC characteristics...

(i) A three-phase, star-connected, 5 kVA, 50 Hz, four-pole alternator has the following test data at rated speed:

(iii) Armature resistance per phase is 2.0 Ω.

(a) Draw the OC and SC characteristics on a graph paper and determine the unsaturated value of synchronous reactance per phase in ohm and in per unit.

(b) Also, determine the percentage voltage regulation at rated load at 0.8 power factor leading using synchronous impedance method under unsaturated condition.