I.E.C. <br/><br/>
STL Guide to the interpretation of IEC 60298-1990-12: Amendment No. 3; AC metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to including 52kV. 

 - 3 
 - Geneva  IEC  2001 
<br/><br/><label>Universal Decimal Class. No.: </label> /