IEC 60947-4-1 Revised
IEC 60947-4-1:1990/AMD2:1996
Amendment 2 - Low-voltage switchgear and controlgear. Part 4: Contactors and motor-starters - Section One: Electromechanical contactors and motor-starters
CHF 20.-
A more recent version of this publication exists: IEC 60947-4-1:2023