International Electrotechnical Commission <br/><br/>
IEC: 62271-100(Ed-2.0) - 2012 (Amendment 1); High-voltage switchgear and controlgear part 100: Alternating current circuit-breakers 

 - 2.0 
 - Geneva  International Electrotechnical Commission  2012 
 - 116 
<br/><br/> Downloaded friom IEC Website 
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