My home is also my lab, and is fed by two separate meters, one spinning disc single phase and the other a newly installed "smart" three phase job. This latter almost certainly senses phase and neutral currents separately by small toroidal current transformers (I can read the values on real time basis, scrolled for display). I should add that the feed is at 400V 50Hz, the line-neutral voltage at 230 being sent through the single phase meter.
Now, I have a dc load of 2kW to feed at about 300V, and I want to do this using a three phase-to-neutral half wave rectifier which gives 280V average (I will deal with the peaks and the filtering). Would this half wave, possibly discontinuous, load cause 1. Any damage to the meter or the 250kVA pole transformer, 2. The smart meter to read low (not so smart after all)? If the meter is smarter than this, how does it handle the unidirectional currents through the CT's?