Mutual impedance of sheath

Definition according to Cigré guide 531 chapter 4.2.1, analogue to screen.

Symbol
$z_{sh,m}$
Unit
$\Omega$/m
Formulae
$\frac{1\frac{m_{e45} \rho_{sh}}{\pi \left(r_{e4}+r_{e5}\right)}}{sinh\left(m_{e45} \left(r_{e3}-r_{e2}\right)\right)}$
Used in
$z_{e4}$