HERMETICALLY SEALED HEAVY-CURRENT BUSHING Russian patent published in 2001 - IPC

FIELD: electrical engineering; switchgear installations, primarily high-voltage ones. SUBSTANCE: bushing has bushing insulator with central bore, current- carrying system built up of series-connected thin-walled external contact lead with circular supporting and fastening surface, central tubular flanged-out contact member also forming circular supporting and fastening surface, and internal contact lead with its respective supporting surface; external contact lead and central tubular contact member are tightly compressed to each other through their supporting surfaces and to external butt-end surface of insulator by means of mushroom-shaped hold-down piece. Additional characteristic features are incorporated in bushing design. EFFECT: improved reliability of sealing arrangement and enhanced performance characteristics of bushing. 10 cl, 4 dwg