| 摘要 |
<p>PURPOSE:To set the mounting intervals of interphase spacers to suitable values by setting the mounting intervals of the spacers to be mounted between transmission lines for the value equal to or smaller than a cylindrical snow deposition preventive limit length therebetween or less. CONSTITUTION:An interphase spacer 11 is mounted at an interval S2 from a supporting point of an iron tower 4 between wires 1 and 2, and an interphase spacer 12 is mounted between the wires 2 and 3. An interphase spacer 13 is mounted between the wires 1 and 2 at an interval S3 from the support of an iron tower 4' at an interval S2 from the mounting point of the spacer 11, an interphase spacer 14 is mounted between the wires 2 and 3, and the mounting interval is set equal to a cylindrical snow deposition preventive limit length Slim or less. The length Slim is obtained by equation (m) according to the type of the wire and size such as the diameter. In the equation (m), K is a constant (proportional to the square roof of twisting rigidity GIp of the wire), D is the diameter of the wire (cm), and n is 'power' to be determined according to the type. Thus, the snow accretion of the wire does not grow to a snow cylinder, and a sleet jump can be prevented.</p> |
