three pots on V phase line

[circuitman]

here is another puzzler. why would you have 3 pots on a v phase primary? there are only 2 hots & a neutral on this pole. but there are three pots , the primary of two of these pots is connected to one phase & the last is on the second phase. the secondaries are interconnected .only seen two like this . don't know if it's a wye or delta , just weird.what could this be?

[cedar stick]

It could be a customer w/a large single phase load and a small 3 phase load and the utility didn't have the right xformer for the large load and just hooked 2 smaller ones up. 2-25kva = 1-50 kva. I haven' seen that done, but I believe you could.