Re: using step-down transformer as step-up

Trying again with a "simple" question :-)
Here's a link to pictures and some info about a transformer:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=400028867104
(You have to scroll down past some irrelevant stuff. Then there are
pictures and a close-up of the nameplate.)
It's a 25kVA 4160/7200/12470V to 240V 60Hz step-down transformer.

What I'm wondering is, if I use this as a step-up transformer by
applying 240V to what is normally the secondary, what would be the no-
load current drawn by the 240V winding?

I suspect there isn't enough information here to determine that, but
perhaps someone who is familiar with transformers of this type would
have some idea?

Robert

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