Bureau of Indian Standards <br/><br/>
IS:2026(part 3)-2009/IEC: 60076-3-2000; Power transformers part 3; Insulation levels, dielectric tests and external clearances in air 

 - 3 
 - New Delhi  BIS  2009 
 - 50 
<br/><br/><label>Universal Decimal Class. No.: </label> /