Final answer:
In a balanced negative phase sequence, the other winding voltages in a generator can be determined using the relationship between the voltage phasors.
Step-by-step explanation:
In a balanced negative phase sequence, the other winding voltages in a generator can be determined using the relationship between the voltage phasors. For a balanced negative phase sequence, the voltage phasors are separated by 120 degrees. Therefore, the other winding voltages can be calculated as follows:
Va = Vb * e^(j * 120°) = Vb * e^(j * 2π/3)
Vc = Vb * e^(j * 240°) = Vb * e^(j * 4π/3)
Substituting the given voltage phasor Vb = 100 ∠155° V, we can calculate:
Va = 100 ∠155° * e^(j * 2π/3) ≈ 50∠275° V
Vc = 100 ∠155° * e^(j * 4π/3) ≈ 50∠35° V
Therefore, the other winding voltages are approximately Va = 50∠275° V and Vc = 50∠35° V.