This technical specification is applicable for the determination of the d.c. withstand
characteristics of ceramic and glass insulators to be used outdoors and exposed to polluted
atmospheres, on d.c. systems with the highest voltage of the system greater than ± 1 000 V.
These tests are not applicable to polymeric insulators, to greased insulators or to special
types of insulators (e.g. insulators with semiconducting glaze or covered with any organic
insulating material).
The object of this technical specification is to prescribe procedures for artificial pollution tests
applicable to insulators for overhead lines, substations and traction lines and to bushings.