Cableizer

Effective length per unit lay length conductor strands

An average lay length factor for all strands in a conductor can be defined, assuming the conductor being build up from strands of uniform dimensions.

If the lay length factor averaged over all strands in the conductor is unknown, a typical value of 1.05 can be used both for copper and aluminium.

Symbol
$F_{lay,c}$

Default
1.0

Formulas
$\displaystyle \overline{F_{\text{lay}}} = \frac{1}{N} \left( 1 + \sum_{m=1}^{M} 6m \sqrt{1 + \left( \frac{2\pi m \, d_{\text{strand}}}{L_{\text{lay}}} \right)^2} \right)$
Used in
$Q_{c}$
Thermal capacitance conductor [J/(m.K)]
$R_{co}$
Standard DC resistance of conductor [$\Omega$/km]