IS: 13947 (Part 4/Sec. 1) - 1993/IEC 947 - 4 - 1 - 1990; Specification for low-voltage switchgear and controlgear Part 4 contactors and motor-starters Section 1 Electromechanical contactors and Motor starters 

 - New Delhi  BIS  1993 
 - 94p 
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