BUREAUOF INDIAN STANDARDS <br/><br/>
IS: 2620(part 3)-2009/IEC 60076-3-2000; Power transformers part 3: Insulation levels dielectric tests and external clearances in air 

 - New Delhi  BIS  2009 
 - 48 
<br/><br/><label>Universal Decimal Class. No.: </label> /