As regards the use of the star point as a pseudo-neutral, for a small load, when no neutral is supplied, I have certainly seen this done on American 3 phase equipment, actully, now I remember it better I have feeling the whole thing was fed by a 3 phase auto- transformer primary, rather than a true motor load, and it was the non-existant neutral at the star point of this transformer that was used. I do remember being a bit surprised not to find a phase-phase double wound transformer.
It worked as the off balance load was only a few % of the full 3 phase load.
I'm not saying its a good thing - just that you may find things like this, particularly in imported apparatus designed for the north american market, and not to be too surprised.
It worked as the off balance load was only a few % of the full 3 phase load.
I'm not saying its a good thing - just that you may find things like this, particularly in imported apparatus designed for the north american market, and not to be too surprised.
