?? WYE or Delta, P(kW) = (VL * I * 1.732 * PF) / 1000. In a WYE you would multiple voltage by 1.732, and in a Delta you would multiple current by 1.732.That would be if the PT's were connected in delta or open delta to measure the L-L voltages. If the PT's were connected as wye-wye, then the power delivered would be 1.732 times higher.