DIN EN IEC 60947-4-1 E:2023
低压开关设备和控制设备 第4-1部分：接触器和电动机起动器 机电接触器和电动机起动器 (IEC 121A/509/CDV:2022) 草案
Draft Document - Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters (IEC 121A/509/CDV:2022); German and English version prEN IEC 60947-4-1:2022