Applies to line post insulators with insulating parts of ceramic material intended for a.c. overhead lines with a nominal voltage higher than 1 000 V and a frequency not higher than 100 Hz.
ICS
29.240.20 Power transmission and distribution lines / Линии электропередачи и распределительные линии
29.080.10 Insulators. Including fittings and other components for insulators / Изоляторы. Включая арматуру и другие компоненты для изоляторов
