Transmission conductor with wind singing reducing groove

Details Transmission conductor with wind singing reducing groove Transmission conductor with wind singing reducing groove

H - Electricity

01

B

337/60

H01B 9/04 (2006.01) H01B 5/08 (2006.01)

Patent

CA 1152590

ABSTRACT OF THE DISCLOSURE A transmission conductor comprises an inner conductor or conductors substantially shaped in a cylindrical form, and an outer conductor layer covering the inner conductor or conductors, the outer conductor layer being annular in secticn, having an even outer surface and being split in a plane or planes radially extending on the center of the transmission conductor into a plurality of split conductor elements. Outer corners of the two adjacent split conductor elements at every predetermined number of junctions between the plurality of split conductor elements are formed in rounded corners, i.e. arcuate in section, with a radius r (m) of curvature. These plurality of split conductor elements disposed annularly on the outer surface of the inner conductor or conductors are stranded in the longitudinal direction. Thus, a plurality of grooves are formed on the outer surface of the outer condcutor layer extending in the stranded longitudinal direction between the rounded corners of the two adjacent split conductor element~. The sectional geometry of the grooves is selected to achieve a low wind pressure transmission conductor or a low wind singing transmission conductor. In the case of a low wind pressure conductor, the radius r of curvature is selected to be - ~ - 28.5 ~ + 5.2 r = 0.0508 10 111 -~10 113 , where V (m/sec) is a wind velocity, and O (degree) is the angle between two adjacent grooves with respect to the center of the transmission conductor.~~On the other hand, in the case of a low wind singing transimmsion conductor, the geometry of the grooves is selected to satisfy 10v D + ~ > 2.55, where D(m) is the diameter of the transmission conductor.

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