DIN EN 60909-3-2010 三相交流系统的短路电流.第3部分:两个对地短路电流和部分短路电流分别同时流入大地时的电流(IEC 60909-3-2009).德文版本EN 60909-3-2010
Short-circuit currents in three-phase a.c. systems - Part 3: Currents during two separate simultaneous line-to-earth short-circuits and partial short-circuit currents flowing through earth (IEC 60909-3:2009); German version EN 60909-3:2010