can anybody suggest me a book or any document for understanding about YIE-DELTA Transformer??

 

Hello,

Here is a pege with information on 3 phase transformers.
http://www.elec-toolbox.com/usefulinfo/xfmr-3ph.htm

Greetings,
Bertus

 

This much of basic i have i need formulae,
pls replay

Hello,

Here is a pege with information on 3 phase transformers.
http://www.elec-toolbox.com/usefulinfo/xfmr-3ph.htm

Greetings,
Bertus

 

Try: http://www.allaboutcircuits.com/vol_2/chpt_10/index.html and for conversions: http://www.allaboutcircuits.com/vol_1/chpt_10/13.html

Dave