Insulators for overhead lines - Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1000 V - Definitions, test methods and acceptance criteria (IEC 61109:2008); German version EN 61109:2008
架空线路用绝缘子.标称电压大于1000V的交流系统用复合悬垂和耐张绝缘子.定义 试验方法和验收标准(IEC 61109-2008);德文版EN 61109:2008