Cableizer ®

Total loss in shield and magnetic armour (phase)

The total loss in shield (screen$||$sheath) and magnetic armour is given acc. IEC 60287-1-1 chapter 2.4.2.1 and is used to calculate the loss factors $\lambda_1$ and $\lambda_2$ which may be assumed to be approximately equal.

Symbol
$W_{sar}$
Unit
W/m
Formulas
${I_{c}}^2 R_{e} \frac{{B_{2}}^2+{B_{1}}^2+R_{e} B_{2}}{\left(R_{e}+B_{2}\right)^2+{B_{1}}^2}$
Related
$B_{1}$
Loss coefficient $B_1$ armour [$\Omega$/m]
$B_{2}$
Loss coefficient $B_2$ armour [$\Omega$/m]
$I_{c}$
Conductor current [A]
$R_{e}$
Electrical resistance shield/armour [$\Omega$/m]
Used in
$\lambda_{11}$
Loss factor shield, circulating currents
$\lambda_{2}$
Loss factor armour