In a balanced three-phase wye connection, the neutral current is zero.

In a balanced three-phase wye connection, the neutral current is zero.

• A. True
• B. False
• C. Not applicable
• D. Sometimes

Answer: (A)

In a balanced three-phase wye, the currents in the three phase conductors have equal magnitudes and are 120 degrees apart. The neutral current is the vector sum of those three phase currents. Because the phasors are evenly spaced around the circle, they cancel each other out, so the neutral current is zero. In real systems, small imbalances or harmonics can create a nonzero neutral current, but under perfectly balanced conditions the neutral carries no current.

In a balanced three-phase wye, the currents in the three phase conductors have equal magnitudes and are 120 degrees apart. The neutral current is the vector sum of those three phase currents. Because the phasors are evenly spaced around the circle, they cancel each other out, so the neutral current is zero. In real systems, small imbalances or harmonics can create a nonzero neutral current, but under perfectly balanced conditions the neutral carries no current.