How do I connect my meter for various 3-phase meter configurations?
The different possible configurations are elaborated here:
There are 3 voltage sensors, one for each phase, and a neutral channel. As all three phase currents and voltages can be measured, calculating power is simple enough.
This configuration differs from the earlier one as it doesn’t measure the voltage of one of the phases. In this figure, Phase B’s voltage is not sensed but still the power calculations can be done using the other values obtained.
The delta configuration takes one of the phases to be the reference (In this case, it is Phase C) and the measurements are made in the other phases with respect to this reference.
This is the delta configuration with the measurements made on all three phases. A separate neutral terminal is present here.
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