This technical specification applies to hybrid insulators for a.c. and d.c. applications consisting
of a load-bearing insulating solid or hollow core consisting of ceramic or glass, a housing
(defined geometry, outside the insulating core) made of polymeric material and end fittings
permanently attached to the insulating core.
Hybrid insulators covered by this technical specification are intended for use as
suspension/tension line insulators, line post insulators, station post insulators and hollow core
insulators for apparatus.