Suspension and tensile composite insulators for AC systems with a nominal voltage higher than 1000V-definition, test methods and acceptance criteria (IEC 61109:2008, MOD)
AC systems with a standard voltage above 1000V with overhanging and sheet-resistant composite insulators - definition, experimental methods and reception guidelines (IEC 61109:2008, MOD)
Suspension and tension composite insulators for a.c. systems with nominal voltages above 1000 V - Definitions, test methods and acceptance criteria (IEC 61109:2008, MOD)