Overhead cable

Abstract

An overhead cable designed to reduce the wind load acting upon the overhead cable in the lower wind speed zone even in a cable having a relatively small diameter, provided with twisted steel strands 1 serving as the tension-bearing core, aluminum strands 2 serving as a conductive layer arranged at the outer circumference of the twisted steel strands 1, and an outermost layer arranged at the outer circumference of the aluminum strands 2, constituted by twisting together a plurality of adjoining segment strands 3, and provided with a spiral groove Tr along the longitudinal direction in the outer circumferential surface region of each boundary portion of adjoining segment strands 3, wherein in the contour of the cross-section of this outermost layer, each groove Tr is comprised by an arc-shaped curve having a radius R centered around a vertex Ap of the regular polygon, and each part between adjoining grooves Tr is comprised by an arc-shaped curve which is concave with respect to a straight line connecting adjoining vertexes Ap of the regular polygon and intersects the arc-shaped curve having the radius R.

Dependencies are inferred from the claim text.