Low-voltage switchgear and controlgear - Part 5-3: Control circuit devices and switching elements - Requirements for proximity devices with defined behaviour under fault conditions (PDF) (IEC 60947-5-3:1999 + A1:2005); German version EN 60947-5-3:1999 + A1:2005
低压开关设备和控制设备.第5-3部分:控制电路装置和开关元件.在故障条件下具有规定行为的接近装置的要求(PDF)(IEC 60947-5-3-1999+A1-2005);德文版EN 60947-5-3:1999+A1:2005