Loss factor of armour by eddy currents

The loss factor of armour caused by eddy currents is calculated acc. to IEC 60287-1-1, clause 2.4.2.4, used for three-core cables with steel tape armour or reinforcement.

Symbol
$\lambda_{22}$
Formulae
$\frac{2.25{s_c}^2 \delta_{ar}{\cdot}{10}^{-8}}{R_c d_{ar}} \left(\frac{1}{1+\frac{d_{ar}}{\mu_s \delta_{ar}}} \frac{f}{50}\right)^2$
Used in