Mutual impedance of screen

Definition according to Cigré guide 531 chapter 4.2.1, parameter $z_4$.

Symbol
$z_{sc,m}$
Unit
$\Omega$/m
Formulae
$\frac{1\frac{m_{e23} \rho_{sc}}{\pi \left(r_{e2}+r_{e3}\right)}}{sinh\left(m_{e23} \left(r_{e3}-r_{e2}\right)\right)}$
Used in
$z_{e4}$