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Just received this spec from a client that needs to temporarily replace a blown-up 480 to 208Y/120V 750 KVA Dry type transformer with a liquid filled unit until a new custom liquid filled can be built.

What is this beast typically used for?
 

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Donuts > Fried Eggs
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I've never seen one like that before, but it looks like it's actually four windings set up to be configurable for a whole mess of possible voltages.

As it stands now it looks like you've got two parallel wyes in the low-voltage compartment. The horizontal jumpers running between all the top bushings would be your neutral point and the vertical jumpers connect the phases of the two wyes in parallel.

I can't follow what's going on in the high voltage side well enough to say for sure, but it looks like it's set up for paralleled deltas.

Can you grab a nameplate photo?
 
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