Tap position VS Impedance

Sure thing - but for a "small" distribution transformer, the cost in playing around with the tapping's on the LV side (which carries the much higher current) is usually just not worth it in comparison to dealing with the much smaller currents on the HV side (all things considered)


The HV taps could be "tap changers" or even a basic set of reconfigurable links (my comment above about off load compared to off circuit)


I've come across the strangest arrangements in university physics labs ranging from rotary phase convertors and transformers with very strange output voltages to large DC distribution arrangements - and sonme of the most unbelievable technical and scientific earthing ever imagined. And that's before the various Phd students get to playing around with stuff to suit their particular experiments.


I once had to relocate a mass spectrometer which had started life somewhere over the pond  - so you'd expect 60Hz and say 480V. After several iterations this thing had more giddling pins and fufu valves attached to it all operating at a variety of supply characteristics,  it would have made Heath Robinson look like a modern manufacturing capability.


Regards


OMS

Sure thing - but for a "small" distribution transformer, the cost in playing around with the tapping's on the LV side (which carries the much higher current) is usually just not worth it in comparison to dealing with the much smaller currents on the HV side (all things considered)


The HV taps could be "tap changers" or even a basic set of reconfigurable links (my comment above about off load compared to off circuit)


I've come across the strangest arrangements in university physics labs ranging from rotary phase convertors and transformers with very strange output voltages to large DC distribution arrangements - and sonme of the most unbelievable technical and scientific earthing ever imagined. And that's before the various Phd students get to playing around with stuff to suit their particular experiments.


I once had to relocate a mass spectrometer which had started life somewhere over the pond  - so you'd expect 60Hz and say 480V. After several iterations this thing had more giddling pins and fufu valves attached to it all operating at a variety of supply characteristics,  it would have made Heath Robinson look like a modern manufacturing capability.


Regards


OMS