Electrical Circuit Theory and Technology 6th Edition by John Bird

تمرين 4

Three identical coils each of resistance 40  and inductive reactance 30  are connected (i) in star, and (ii) in delta to a 400 V, three-phase supply. Calculate for each connection (a) the line and phase voltages, (b) the phase and line currents, and (c) the total power dissipated.