The following data were obtained or a 30-kva, 60 hz, 2400-240V transformer tested at 60hz.
Voltage (V), Current(A), Power(W)
O.C. Test 240V, 3.0 A, 230 W
S.C. Test 70V, 18.8 A, 1050 W
a). determine the primary voltage when 12.5 A at 240 V is taken from the low voltage side supplying a load of 0.8 p.f. lagging.
b). Compute the efficiency and regulation in part (a)