Keywords:
Balanced Three-Phase
Voltages
Problem #1
The magnitude of the phase voltage of an ideal balanced three-phase Y-connected source is 400 V. The source is connected to a balanced Y-connected load through a line that has an impedance of 1+j5 Ω. The load is a 19 Ω resistor in series with an inductive reactance and the magnitude of the load voltage is 380 V. If the circuit is operating at the frequency of 60 Hz, determine the inductance of the load.
Need a hint?
Construct the a-phase equivalent circuit for the 3-phase system. Use voltage divider to relate the load voltage to the source voltage.