DIN EN 60947-5-8-2007
低压开关设备和控制设备.第5-8部分:控制电路装置和开关元件.三位启动开关(IEC 60947-5-8-2006)
Low-voltage switchgear and controlgear - Part 5-8: Control circuit devices and switching elements - Three-position enabling switches (IEC 60947-5-8:2006); German version EN 60947-5-8:2006