We have a step down transformer from the utility company - 15 KV to 480 volt. The nameplate reads "AIC at zero sequence impedance". I know what the AIC is, but what does the zero sequence impedance ...

This theory explains how the physical phase readings for current, voltage and phase angle are transformed into the Sequence domain, giving metrics of Positive, Negative and Zero Sequence components.

The neutral conductor in a load circuit must pass through a zero-sequence sensor in the same direction as the phase conductors. Unbalanced signals cause false tripping. When a circuit is monitored by ...