For a three-phase, four-wire, Y-connected load that is unbalanced, the neutral current is:
A) in phase with the smallest phase current.
B) zero.
C) equal to the sum of the phase currents.
D) equal to the largest phase current minus the other two phase currents.

Question

Quizplus · Accepted Answer

In a three-phase, four-wire, Y-connected unbalanced load, the neutral current is the vector sum of the three phase currents. This is because the unbalanced currents in each phase do not cancel each other out completely, leading to a non-zero current in the neutral wire.

For a Three-Phase, Four-Wire, Y-Connected Load That Is Unbalanced, the Neutral