Three Phase Circuits

Quick Overview of Theory

A 60-Hz three-phase wye source (where one of the phase voltages is 110 Vrms <0) is connected to a three-phase delta load (where each phase consists of a 50 ohm resistor in series with a 10 mH inductor).
a) Draw the circuit, labeling each element appropriately.
b) Find the magnitude (in rms volts) and phase angle (in degrees) of the line-to-line voltages.
c) What is the per-phase impedance of the load in rectangular and in polar format?
d) Find the magnitude (in rms volts) and phase angle (in degrees) of the phase voltages in the load.
e) What is the total real power (P) absorbed by the load?

A 60-Hz three-phase delta source (where one of the phase voltages is 110 Vrms <0) is connected to a three-phase wye load (where each phase consists of a 50 ohm resistor in series with a 10 mH inductor).
a) Draw the circuit, labeling each element appropriately.
b) Find the magnitude (in rms volts) and phase angle (in degrees) of the line-to-line voltages.
c) What is the per-phase impedance of the load in rectangular and in polar format?
d) Find the magnitude (in rms volts) and phase angle (in degrees) of the phase voltages in the load.
e) What is the total real power (P) absorbed by the load?

A 220-V RMS line voltage from a 3-phase source transmits power to a wye-connected load.  The RMS current in one of the phases of the load is found to be 4.5 ∠ 25° A.  Find the following.
a) The impedance of each phase of the load.
b) The total power absorbed by the load.