International Electrotechnical Commission <br/><br/>
IEC: 62271 - 103(Ed-1.0) - 2011-06; High - voltage switchgear and controlgear - part 103 : switchgesfor rated voltages above 1 kv up to and incluing 52 kv 

 - Geneva  IEC  2011 
 - 134 
<br/><br/> Downloaded from IEC website 
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