Question

The line current of a three-phase engine in delta configuration is 25 A, connected to a supply network with a line voltage of 240 V and absorbing a power of 15 kW. The efficiency of the engine is 90%.
Taking as a reference of line voltages V1= V∠0º, and a direct sequence, find:
a) The phasors of the line voltages
b) The phasors of the line and phase currents
c) The reactive and apparent power
d) The mechanical power (at the engine's axis)
e) The equivalent single phase circuit formed by a single impedance

Answer 1

Some manipulation had to be done for power calculation as power factor for the circuit was coming to be greater than 1.