Draft Document - Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - Semiconductor controllers and semiconductor contactors for non-motor loads (IEC 121A/307/CDV:2019); German and English version prEN IEC 60947-4-3:2019
文件草案——低压开关设备和控制设备——第4-3部分:接触器和电动机起动器——非电动机负载用半导体控制器和半导体接触器(IEC 121A/307/CDV:2019);德文和英文版本prEN IEC 60947-4-3:2019