This looks like a 3-phase power measurement, but the meter must have been connected wrong. V31 is close to zero, indicating that phases 3 and 1 are effectively shorted together. It cannot be just a 2 phase measurement because then the currents do not make sense. My guess is that they connected the phase 3 voltage probe to the wrong place - to phase 1 instead of 3. That would produce the top measurements, but make the resulting power measurements nonsense.
I don’t want to derail the proper topic of this thread, but I will add that there were 4 wires connected to the HT, while the PCE was set in 3phase 3wire mode (bottom Left corner of screen). That means no neutral wire. However the neutral was connected to the HT.
There were 6 wires coming from the HT, three on each end. Two on each end were connected together, implying a series connection of three coil sections. However there were 4 wires, which correspond (correct colour for Italy) to a 3 phase plus neutral supply, with blue control boxes intercepting at least two phases. Maybe all three, I forget. Each of the 4 wires was in turn connected to a lead on the HT, either to a lead pair connection or to a single lead, on both ends. I tried modelling the current flow and it is ugly.
This is what I got from the photos. (Where the wires go inside inside of the HT is theoretical).
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