International Electrotechnical Commission <br/><br/>
IEC: 62271-201(Ed-1) - 2006; High- voltage switchgear and controlgear - part 201: AC insulation - enclosed switchgear and controgear for rated voltages above 1 kv & upto and including 52 kV 

 - 1 
 - Geneva  IEC  2006 
 - 167 
<br/><br/><label>ISBN: </label>2-8318-8707-0 
<br/><br/><label>Universal Decimal Class. No.: </label> /