Cableizer ®

Electrical resistance shield/armour

Equivalent electrical resistance of screen$||$sheath and armour in parallel at operating temperature.

Symbol
$R_{e}$
Unit
$\Omega$/m
Formulas
$R_{s}$without armour IEC 60287-1-1
$\frac{R_{s} R_{ar}}{R_{s}+R_{ar}}$with armour, IEC 60287
$R_{sh}$CIGRE TB 880 Guidance Point 31, multi-core cables with without/armour
$R_{ar}$with armour without shield
Related
$R_{ar}$
Electrical resistance armour [$\Omega$/m]
$R_{s}$
Electrical resistance shield [$\Omega$/m]
$R_{sh}$
Electrical resistance sheath [$\Omega$/m]
Used in
$\lambda_{1}$
Loss factor shield (screen/sheath)
$\lambda_{11}$
Loss factor shield, circulating currents
$M_{e}$
Substitution coefficient $M_e$ to calculate factor $F_e$
$N_{e}$
Substitution coefficient $N_e$ to calculate factor $F_e$
$W_{sar}$
Total loss in shield and magnetic armour (phase) [W/m]
$\xi_{X}$
Parameter $\xi$ calculation of loss factor