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Factor $X_K$

Factor $X_K$ for the calculation of the screening factor for three-core cables.

Symbol
$X_K$
Formulae
$\delta_1 \rho_i \frac{k_{sc}}{d_c}$round conductors
$\delta_1 \rho_i \frac{k_{sc}}{d_x}$sector-shaped conductors
Related
$d_c$
External diameter of conductor [mm]
$d_x$
Equivalent diameter of a conductor [mm]
$\delta_1$
Thickness of screening layer [mm]
$k_{sc}$
Thermal conductivity of screen material [W/(m.K)]
$\rho_i$
Thermal resistivity of insulation [K.m/W]
Used in
$K_{02}$
Factor $K_{0.2}$
$K_{06}$
Factor $K_{0.6}$
$K_{10}$
Factor $K_{1.0}$