Transformer

If this is for another consultancy job I'd definitely want my money back!

i m not asking to you. I m asking to that peoples who knows that answers. you

Go over to the right side of the screen and enter your question in the search window. There are plenty of answers to your question.

What is mean by Dyn11?

D-Capital D means High voltage side delta connection.

y-small y means low voltage side having star connection.

n-neutral brought-out.

11- it denote that the phase shift between primary & secondary winding is +30deg.

means LV winding leading with HV with 30 deg.

when it is used?

it is used genearally in distribution system bcz. Secondary having star (4 wire system)

3 phases and 1 neutral & 11 phase shift is always used because winding construction of delta side is more easier in 11 than oters. if you use Dyn1 then it will not affect your system only phase shift will changed,but affect the parallel operation of transformer.

Dyn11 & Dyn1 only depends upon Delta side winding Connection.(way of jointing leads)

Pl. send me your mail ID. I will send you an article written by me on the Transformer Vector Groups that I got published in Electrical India Magazine March 2010 issue.