AS 61109:2020 applies to composite suspension/tension insulators consisting of a load-bearing cylindrical insulating solid core consisting of fibres – usually glass – in a resin-based matix, a housing (outside the insulating core) made of polymeric material and end ftting permanently attached to the insulating core.
Composite insulators covered by this standard are intended for use as suspension/tension line insulators, but it should be noted that these insulators can occaslonally be subjected to compression or bending, for example when used as phase-spacers.
