Impedance of shield outer surface

Refer to 'Electromagnetic Transients in Power Cables', F.F. da Silva, C.L. Bak (2013)

Symbol

$\mathscr{z}_{5,s}$

Unit

$\Omega$/m

Formulae

$\frac{m_{z,s} \rho_s}{2\pi r_{z3,sh}} \operatorname{coth}\left(m_{z,s} \left(r_{z3,sh}-r_{z2,sc}\right)\right)-\frac{\rho_s}{2\pi r_{z3,sh} \left(r_{z2,sc}+r_{z3,sh}\right)}$

Related

$m_{z,s}$

Parameter m of shield

$\pi$

Archimedes' constant $\pi$

$r_{z2,sc}$

Radius of screen (inner) [m]

$r_{z3,sh}$

Radius of sheath (outer) [m]

$\rho_s$

Specific electrical resistivity of shield [$\Omega$.m]