Problem 84-1    Source:   Problem elaborated by the author of the site.

Assuming a direct sequence in an unbalanced source, we have:

V_AN = 100 ∠30°,  V_BN = 150 ∠-60°   and   V_CN = 120 ∠180°. Calculate:

a) The modulus of the line voltages and their respective angles.

b) Make diagram of voltages.

Problem 84-2    Source:   Problem elaborated by the author of the site.

Using the data from the previous problem and suppose the unbalanced impedances with the following values:

Z_AB = 10 ∠30°  ,   Z_BC = 12 ∠-30°   e   Z_CA = 18 ∠60°. In the circuit configuration shown in the Figure 84-2.1, calculate:

a) the phase currents.

b) the line currents.

Problem 84-3    Source:   Problem elaborated by the author of the site.

Using the data from the previous problems, calculate:

a) The total real power at each phase.

b) The total reactive power and in each phase.

c) The total apparent power at each phase.

Problem 84-4    Source:   Problem elaborated by the author of the site.

Using the data from the previous problems, compare the results of power in the load with the power supplied by the source.