Cableizer ®

Parameter m armour

Definition according to CIGRE TB 531 chap. 4.2.1

Symbol
$m_{z,ar}$
Formulas
$\sqrt{\frac{\omega \mu_0}{\rho_{ar}}}$armour
$\sqrt{\frac{j Romega \mu_0}{\rho_{sp}}}$steel pipe
Related
$\mu_0$
Vacuum permeability [H/m]
$\omega$
Angular frequency [rad/s]
$\rho_{ar}$
Specific electrical resistivity armour material [$\Omega$.m]
$\rho_{sp}$
Specific electrical resistivity steel pipe material [$\Omega$.m]
Used in
$\mathcal{Z}_{pin}$
Impedance armour inner surface [$\Omega$/m]
$\mathcal{Z}_{pmut}$
Mutual impedance armour [$\Omega$/m]
$\mathcal{Z}_{pout}$
Impedance armour outer surface [$\Omega$/m]