How is imbalance factor calculated in EOCR-i3DM (Z, S, 420) / iFDM (Z, S, 420) for current imbalance protection

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Imbalance factor for EOCR-i3DM (Z, S, 420) / iFDM (Z, S, 420) is calculated as follows:

Imbalance factor (%) = (Imax phase - Imin_phase) / Imax_phase x 100%