EN 60439-3:1991/prA1:1992 低压开关和控制设备组件.第3部分:安装于非技术人员使用的地点的低压开关和控制设备.配电板的特殊要求.修改件1
Low-voltage switchgear and controlgear assemblies; part 3: particular requirements for low-voltage switchgear and controlgear assemblies intended to be installed in places where unskilled persons have access for their use; distribution boards; amendment 1