Cableizer ®

Electrical resistance screen

Electrical resistance of screen at operating temperature.

Symbol
$R_{sc}$
Unit
$\Omega$/m
Formulas
${10}^6\frac{\rho_{sc}}{A_{sc}}$at 20°C
${10}^6\frac{F_{lay,sc} \rho_{sc}}{A_{sc}}$CIGRE TB 880 Guidance Point 27, at 20°C
$R_{sc} \left(1+\alpha_{sc} \left(\theta_{sc}-20\right)\right)$at operating temperature
$F_{lay,3c} R_{sc}$CIGRE TB 880 Guidance Point 44, three-core cables at operating temperature
Related
$A_{sc}$
Cross-sectional area screen [mm$^2$]
$\alpha_{sc}$
Temperature coefficient screen material [1/K]
$F_{lay,3c}$
Effective length per unit lay length twisted conductors
$F_{lay,sc}$
Effective length per unit lay length screen wires
$\rho_{sc}$
Specific electrical resistivity screen material [$\Omega$.m]
$\theta_{sc}$
Temperature screen [°C]
Used in
$\lambda_{11,sc}$
Loss factor screen, circulating currents
$\lambda_{11,sh}$
Loss factor sheath, circulating currents
$R_s$
Electrical resistance shield [$\Omega$/m]
$R_{so}$
Electrical resistance screen/sheath 20°C [$\Omega$/m]