This guide is mainly applicable to three-phase systems up to 525 kV (phase-to-phase). Applies to outdoor ceramic and glass insulators, used in a.c. systems, of the following types: long-rod and traction line insulator; cap and pin insulator; pedestal typ
IEC TR 60815:1986 history
1986IEC TR 60815:1986 Guide for the selection of insulators in respect of polluted conditions