Dear Sir,

AC system phasing or polarity only applies when comparing two or more ac signals to each other. A single AC value on its own has no polarity. The standard assignment for our CTs is for the marked H1 side to be toward the source and away from the load. In this configuration, the output lead marked with the green dot and the “X1” will be the “positive” lead when compared to the driving voltage of the system. Please note that care must be taken to appropriately connect the 3 phase voltages in the right direction AND sequence for proper power system measurement.