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A calculate the magnitude and phase angles of the phase

Problem 1: An unbalanced 3-phase load consisting of:

Z_A = 5kW at a lagging power factor of 0.7

Z_B= 6kW at a lagging power factor of 0.9

And Z_C = 8kW at a lagging power factor of 0.8

Is connected in star configuration to a 3-phase, 4 wire 450v supply.

a. Calculate the magnitude and phase angles of the phase voltages at the load.

b. Calculate the magnitude and phase angles of the 3 line currents.

c. Calculate the magnitudes and phase angle of the current in the neutral wire.

d. Calculate the total reactive power in the load.

e. State what will happen if the neutral wire becomes open-circuited?

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Electrical Engineering: A calculate the magnitude and phase angles of the phase

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