Weird way to spec a transformer.
I have only had one transformer from India, and it will be the last. If I could send it back there, or perhaps just drop it off the quayside into the river and hide it, I would do so. Quality was awful: horrible welding, lousy paint, horrible instruments, a core and winding pack which tested good but looked bad. There might be some decent manufacturers in India - I'm sure there are - but I have no urge to explore further. This pile of crap was supplied as being a British transformer!
Where are you based? You might get more meaningful replies.