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Length of lay armour

The value is the average of the length of lay of 1st and 2nd armour layer weighted by their thicknesses.

Symbol
$L_{lay,ar}$
Unit
mm
Formulas
$\frac{p_{a,1} t_{a,1}+p_{a,2} t_{a,2}}{t_{ar}}$
Related
$p_{a,1}$
Length of lay armour 1 [mm]
$p_{a,2}$
Length of lay armour 2 [mm]
$t_{a,1}$
Thickness armour 1 [mm]
$t_{a,2}$
Thickness armour 2 [mm]
$t_{ar}$
Thickness armour [mm]
Used in
$F_{lay,ar}$
Effective length per unit lay length armour
$H_1$
Inductance $H_1$ armour [H/m]
$H_2$
Inductance $H_2$ armour [H/m]
$\phi_{ar}$
Angle between armour and cable axis [rad]