Ratio of losses filler

Ratio of losses in conductor and screen/sheath to losses in conductor affecting the filler of multi-core cables.

Symbol
$q_f$
Formulas
$1+\lambda_1$separate screen / separate sheaths (type SS)
$1+\frac{\lambda_1}{2}$separate screen / common sheath (type SC)
$1$common screen / common sheath (type CC)