FIELD: power engineering.
SUBSTANCE: invention is related to electric power industry, namely to indicators of state of polymer insulators used on overhead transmission lines of high voltage. Plate insulator consists of metal cap (1), rod (2) and insulating part (3) connected to each other by means of cement-sand ligament; on surface of insulating part (1) there is at least one electroconductive element without contact with metal parts of disc insulator or, alternatively, with contact by galvanic connection with metal parts of disc insulator. Area S of the electrically conductive element is selected by value S≥1 cm2. Electrically conductive elements are made in the form of coating, from thin metal sheet and from electroconductive composite material.
EFFECT: invention provides high reliability of indication on the plate insulator insulation part surfaces.
20 cl, 3 dwg
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