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Impedance insulation conductor—screen

Definition according to Cigre TB 531 chap. 4.2.1

Symbol
$\mathscr{z}_2$
Unit
$\Omega$/m
Formulas
$\frac{j \omega \mu_0}{2\pi} \ln\left(\frac{r_{z2}}{r_{z1}}\right)$
Related
$\mu_0$
Vacuum permeability [H/m]
$\omega$
Angular frequency [rad/s]
$\pi$
Archimedes' constant $\pi$
$r_{z1}$
Radius conductor [m]
$r_{z2}$
Radius shield (inner) [m]
Used in
$\mathscr{z}_{cc}$
Impedance conductor [$\Omega$/m]
$\mathscr{z}_{int}$
Impedance cable, internal [$\Omega$/m]