DIN EN 50122-2-2011 轨道交通.固定设备.电气安全,接地和回路.第2部分:克服直流牵引系统漏电流影响的规定;德文版本EN 50122-2-2010
Railway applications - Fixed installations - Electrical safety, earthing and the return circuit - Part 2: Provisions against the effects of stray currents caused by d.c. traction systems; German version EN 50122-2:2010