Cableizer ®

Cross-sectional area armour

Symbol
$A_{ar}$
Unit
mm$^2$
Formulas
$n_{ar} \left(\frac{t_{ar}}{2}\right)^2 \pi$round wires
$n_{ar} t_{ar} w_{ar}$flat wires
$\frac{w_{ar}}{w_{ar}+g_{a,1}} \pi t_{ar} n_{ar} \left(D_{ab}+n_{ar} t_{ar}\right)$steel tape armour, CIGRE TB 880 Guidance Point 42
$\left(\left(\frac{d_{ar}+t_{ar}}{2}\right)^2-\left(\frac{d_{ar}-t_{ar}}{2}\right)^2\right) \pi$TECK
Related
$a_{type}$
Construction of armour
$D_{ab}$
Diameter over armour bedding [mm]
$d_{ar}$
Mean diameter armour [mm]
$g_{a,1}$
Gap between [mm]
$n_{ar}$
Number of wires armour
$\pi$
Archimedes' constant $\pi$
$t_{ar}$
Thickness armour [mm]
$w_{ar}$
Width armour [mm]
Used in
$\delta_{ar}$
Equivalent thickness of armour [mm]
$F_{ppc}$
Permissible pull force [N]
$\lambda_2$
Loss factor armour
$m_{ar}$
Mass armour [kg/m]
$Q_{ar}$
Thermal capacitance armour [J/(m.K)]
$R_{ar}$
Electrical resistance armour [$\Omega$/m]
$\rho_{ar}$
Specific electrical resistivity armour material [$\Omega$.m]