Cableizer ®

Electrical resistance shield

Equivalent resistance of screen $R_{sc}$ and resistance of sheath $R_{sh}$ in parallel at operating temperature.

Symbol
$R_s$
Unit
$\Omega$/m
Formulas
$\frac{R_{sh} R_{sc}}{R_{sh}+R_{sc}}$screen and sheath
$\frac{1}{\frac{1}{R_{sc}}+\frac{1}{R_{sw}}}$screen and skid wires
$0$without screen & sheath
Related
$R_{sc}$
Electrical resistance screen [$\Omega$/m]
$R_{sh}$
Electrical resistance sheath [$\Omega$/m]
$R_{sw}$
Electrical resistance skid wires [$\Omega$/m]
Used in
$E_a$
Induced shield voltage phase a [V/m]
$I_{kx}$
Split fault current [A]
$I_s$
Induced circulating current shield [A]
$\lambda_2$
Loss factor armour
$R_e$
Electrical resistance shield/armour [$\Omega$/m]
$RF$
Reduction factor
$V_{ab}$
Voltages between shields/sheaths at the cross-bonding points phases a — b [V]
$V_{ac}$
Voltages between shields/sheaths at the cross-bonding points phases a — c [V]
$Z_s$
Self impedance of metal screen with earth return [$\Omega$/m]