Three-Phase Neutral Imbalance and Distro

Neutral current estimate, imbalance percent, harmonic-load warning.

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Formula and source

Three-phase neutral current (balanced linear loads) I_N = sqrt(I_A² + I_B² + I_C² − I_A·I_B − I_B·I_C − I_A·I_C). Harmonic-load warning (3rd harmonic doubles neutral current via in-phase summation).

IEEE 519 (Standard for Harmonic Control in Electric Power Systems) by name; classical three-phase electrical theory.

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