Rotating electrical machines - Part 18: Functional evaluation of insulation systems; section 21: Test procedures for wire-wound windings; thermal evaluation and classification (IEC 60034-18-21:1992); German version EN 60034-18-21:1994
旋转电机.第18部分:绝缘系统的功能评定;第21节:绕线绕组的试验程序;热评估和分类(IEC 60034-18-21-1992);德文版EN 60034-18-21:1994