Cableizer ®

Capacitance shield - ground

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

Symbol
$C_{sg}$
Unit
F/m
Formulas
$2\pi \epsilon_{0} \frac{\epsilon_{j}}{\ln\left(\frac{D_{j}}{D_{sh}}\right)}$with jacket
$2\pi \epsilon_{0} \frac{\epsilon_{ab}}{\ln\left(\frac{D_{ab}}{D_{sh}}\right)}$with armour bedding
$2\pi \epsilon_{0} \left(\frac{\epsilon_{j}}{\ln\left(\frac{D_{j}}{D_{ab}}\right)}+\frac{\epsilon_{ab}}{\ln\left(\frac{D_{ab}}{D_{sh}}\right)}\right)$with jacket and armour bedding
Related
$D_{ab}$
Diameter over armour bedding [mm]
$D_{j}$
Diameter over jacket [mm]
$D_{sh}$
Diameter over sheath [mm]
$\epsilon_{0}$
Vacuum permittivity [F/m]
$\epsilon_{ab}$
Relative permittivity armour bedding
$\epsilon_{j}$
Relative permittivity jacket
$\pi$
Archimedes' constant $\pi$
Used in
$Y_{sg}$
Admittance shield - ground [S/m]