3-Phase Vector Plot

Interactive 3-phase vector diagram. Enter phase magnitudes to visualise the vector sum and calculate the residual neutral value.

Phase Magnitudes

Residual (Neutral)

0
Vector Sum Magnitude

For balanced 3-phase systems, the residual should be zero. Any imbalance will result in a non-zero neutral current/voltage.

Vector Diagram

3-Phase Vector Relationships

Phase Displacement: In a balanced 3-phase system, phases are displaced by 120° (2π/3 radians).

Vector Addition: The resultant is found by adding vectors tip-to-tail.

Residual Current: IN = IL1 + IL2 + IL3

Balanced System: When all phases are equal, IN = 0

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