You may be right - I'll try when I have some moments. The L does, of course, carry boththe 'load' and the 'fault' currents.2 points, one, I think with tn-s the situation would be better, as only the L has a load on it, the E is in the no load situation.
I'm not so sure about that. If you look at the last simulation I posted (message 71), although I was using a transformer voltage of 250V, what I presented went all the way to a supply voltage (without fault) of just 82V (due to high loads), and even then the 'error' (in PFC) was still under 10% - and that was a much more dramatic VD than from 460V to 230V. However, when I have a moment I'll post a simulation of what you describe.The other point about why the error is so small, i think it's because (or maybe the reason why) the permitted voltage drop is small. If it helps, consider a situation where the transformer voltage is 460v and the supply voltage is 230v due to other loads.
Kind Regards, John
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