DIN EN 60077-2:2018 轨道交通.机车车辆电气设备.第2部分:电工元件.总则(IEC 60077-2-2017); 德文版本EN 60077-2-2017
Railway applications - Electric equipment for rolling stock - Part 2: Electrotechnical components - General rules (IEC 60077-2:2017); German version EN 60077-2:2017