A 240kW 500 Volt 1750rpm separately excited dc generator has an overall efficiency of 94%. The shunt field resistance is 60ohms, and the rated current is 5amps. The I^2R loss in the armature is 0.023pu. Calculate the armature current, total losses in the machine, and the I^2R losses in the armature. Help would be greatly appreciated as my calculations for Armature Current Ia is in my mind way too high, 480A.