Skin effect factor of conductor

In the absence of alternative formulae, it is recommended that the formulae should be used for sector and oval-shaped conductors.

Symbol
$y_{s}$
Formulae
$\frac{x_{s}^{4}}{0.8 x_{s}^{4} + 192}$$x_{s} \leq 2.8$
$0.354 x_{s} - 0.733$$x_{s} > 3.8$
$0.0563 x_{s}^{2} - 0.0177 x_{s} - 0.136$otherwise
Used in
$R_{0}$
$R_{c}$