IEC 60947-5-4:2002+AMD1:2019 CSV
低压开关设备和控制设备第5-4部分:控制电路设备和开关元件低能触点性能的评估方法特殊试验
Low-voltage switchgear and controlgear - Part 5-4: Control circuit devices and switching elements - Method of assessing the performance of low-energy contacts - Special tests