DIN EN 60660-2000 绝缘子.标称电压在1KV至300KV(不含)的系统用有机材料户内支柱绝缘子的试验
Insulators - Tests on indoor post insulators of organic material for systems with nominal voltages greater than 1 kV up to but not including 300 kV (IEC 60660:1999); German version EN 60660:1999