Cableizer ®

Voltages between shields at CB point phases a—c

Definition according to IEEE 575-2014 Annex E.1.4

Symbol
$V_{ac}$
Unit
kV
Formulas
${10}^{-3}I_{kc}L_{sys}\left(Z_{sg}-Z_{ss}+R_{s}\right)$single-phase fault in phase a
$0$single-phase fault in phase b
${10}^{-3}I_{ka}L_{sys}\left(Z_{sg}-Z_{ss}+R_{s}\right)$single-phase fault in phase c
${10}^{-3}I_{kc}I_{kx} \left(Z_{ss}-R_{s}-Z_{oog}\right)$single-phase fault in phase a, flat
Related
$e$
Constant $e$ [m/s$^2$]
$I_{ka}$
Complex conductor current a [A]
$I_{kc}$
Complex conductor current c [A]
$I_{kx}$
Split fault current [A]
$L_{sys}$
System length [m]
$R_{s}$
Electrical resistance shield [$\Omega$/m]
$Z_{oog}$
Mutual impedance between shields/sheaths of outer cables with ground return [$\Omega$/m]
$Z_{sg}$
Mutual impedance of shield/sheath with ground return [$\Omega$/m]
$Z_{ss}$
Self impedance of the shield/sheath with ground return [$\Omega$/m]