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Capacitance shield - amour

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

Symbol
$C_{sa}$
Unit
F/m
Formulae
$2\pi \epsilon_0 \frac{\epsilon_{ab}}{\ln\left(\frac{D_{ab}}{D_{sh}}\right)}$with armour bedding
$2\pi \epsilon_0 \frac{\epsilon_{shj}}{\ln\left(\frac{D_{shj}}{D_{sh}}\right)}$with sheath jacket
$2\pi \epsilon_0 \left(\frac{\epsilon_{shj}}{\ln\left(\frac{D_{shj}}{D_{sh}}\right)}+\frac{\epsilon_{ab}}{\ln\left(\frac{D_{ab}}{D_{shj}}\right)}\right)$with armour bedding and sheath jacket
Related
$D_{ab}$
Diameter over armour bedding [mm]
$D_{sh}$
Diameter over sheath [mm]
$D_{shj}$
Diameter of sheath jacket [mm]
$\epsilon_0$
Vacuum permittivity [F/m]
$\epsilon_{ab}$
Relative permittivity of armour bedding
$\epsilon_{shj}$
Relative permittivity of sheath jacket
$\pi$
Archimedes' constant $\pi$
Used in
$Y_{sa}$
Admittance shield - armour [S/m]