ADSS cable: Kevlar design, and use Reach calculation, Maximum tensile force


In the last article,

Facts about ADSS All-dielectric self-supporting cable

James explained the structural design of the ADSS cable.

This time James specifically shared the Aramid Thread (Kevlar) in ADSS, design, and use.


Aramid yarn is a high modulus aramid yarn suitable for ADSS cable. Aramid yarn has special properties such as low density, very high tensile modulus, high resistance to breakage, and low elongation at break; At temperature, it can maintain its inherent stability, very low shrinkage, low deformation, and very high glass transition temperature, in addition to high corrosion resistance, non-conductive, in addition to strong acids and alkalis, Strong resistance to chemicals is an upper cable reinforcement unit material.



Within the aramid yarn, there is an American brand, Kevlar, the most widely used, we use the material of this brand to analyze.


As shown below, the yellow part is Kevlar.


In order to accurately calculate the amount of material required, we need to know some parameters, one is the span, one is the maximum pull, and the other is the Kevlar cross-sectional area.


Please refer to the figure below, in the actual use scenario


We are going to calculate it step by step. Have patience. The formula included here is very complicated.


Aramid yarn details: something like (20 * K49 3000D) This ma