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Parameter m of shield

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

Symbol
$m_{z,s}$
Formulae
$\sqrt{\frac{j \omega \mu_0}{\rho_s}}$
Related
$\mu_0$
Vacuum permeability [H/m]
$\omega$
Angular frequency [rad/s]
$\rho_s$
Specific electrical resistivity of shield [$\Omega$.m]
Used in
$\mathscr{z}_{3,s}$
Impedance of shield inner surface [$\Omega$/m]
$\mathscr{z}_{4,s}$
Mutual impedance of shield [$\Omega$/m]
$\mathscr{z}_{5,s}$
Impedance of shield outer surface [$\Omega$/m]