FIELD: electrical engineering; high-voltage insulators bearing heavy mechanical loads in high-voltage power transmission lines and in urban transport and railway contact systems.
SUBSTANCE: proposed polymeric insulator has insulating stick lined with tracking-protective ribs provided on its external cylindrical surface and reinforced by metal end pieces; each end piece is assembled of minimum two parts, each incorporating special member for fixing respective part of end piece and insulating stick in axial direction; this member enters mating member of insulating stick; end piece parts and insulating stick are also fixed in radial direction by means of shroud ring enclosing end piece parts.
EFFECT: enhanced reliability of end piece fixation to insulating stick due to enhanced bearing capacity of their joint.
4 cl, 9 dwg
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