Cableizer ®

Loss factor screen, circulating currents

This is the loss factor caused by circulating current losses in screen wires for cables which have screen and sheath and are not single-side bonded. Please refer to CIGRE TB 880 chapter 5.1.5 (case study 1).

Symbol
$\lambda_{11,sc}$
Formulas
$\lambda_{11} \frac{R_{sh}}{R_{sc}+R_{sh}}$
Related
$\lambda_{11}$
Loss factor shield, circulating currents
$R_{sc}$
Electrical resistance screen [$\Omega$/m]
$R_{sh}$
Electrical resistance sheath [$\Omega$/m]
Used in
$\lambda_1$
Loss factor shield (screen/sheath)
$\lambda_{1s}$
Loss factor screen, circulating currents
$\theta_{sh}$
Temperature sheath [°C]
$W_{sc}$
Screen losses (phase) [W/m]