NEN 10947-4-1-1993 Low-voltage switchgear and controlgear. Part 4: Contactors and motor-starters. Section one: Electromechanical contactors and motor-starters (IEC 947-4-1:1990)
1993NEN 10947-4-1-1993 Low-voltage switchgear and controlgear. Part 4: Contactors and motor-starters. Section one: Electromechanical contactors and motor-starters (IEC 947-4-1:1990)