FIELD: electrical engineering; electric insulators. SUBSTANCE: pin insulator has monolithic ribbed surface joined to pin by means of polymeric base adhesive followed by curing; rib pitch is at least 2; tilting angles of ribs range between 2 and 60 deg.; ratio of longest rib projection to distance between rib feet is between 4 and 1.5; distance from first rib to terminator is at least 0.4 of rib pitch. EFFECT: improved electrical discharge characteristics of insulator. 1 dwg
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