EN 61109:2008 架空线路绝缘子 标称电压大于 1000 V 的交流系统用复合悬式和耐张绝缘子 定义 测试方法和验收标准
Insulators for overhead lines - Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V - Definitions@ test methods and acceptance criteria