FIELD: railway transport, electrical engineering. SUBSTANCE: proposed insulator includes cylindrical supporting rod with conical tail parts, end terminals and bushing which carry couplings. Internal surfaces of couplings and bushings are made in the form of truncated cones joined to conical tail parts of rod and facing ends of rod with bigger bases. Split bushings are put on conical tail parts. Couplings are connected to end terminals by means of inner cylindrical thread with compression of rod via split bushings. EFFECT: increased reliability of unit attaching end terminal to insulator rod. 1 dwg
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