International Electrotechnical Commission <br/><br/>
IEC: 947-4-1 - 1990 (Amendment No.2 - 1996); low voltage switchgear & controlgear, part 4 - Contactors & Motor-startors Sec.1 - Electromechanical contactors and motor-starters 

 - Geneva  IEC  1996 
 - 15 
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