Impedance of shield outer surface

Definition according to Cigré guide 531 chapter 4.2.2.5 for composite screen, parameter $Z_5$.

Symbol
$z_{e5}$
Unit
$\Omega$/m
Formulae
$z_{sh,o}-\frac{{z_{sh,m}}^2}{z_{sc,o}+z_{sc,sh}+z_{sh,i}}$
Related
$z_{sc,o}$
$z_{sh,i}$
$z_{sh,m}$
$z_{sh,o}$
Used in
$z_{ss}$