Diameter of sheath and armour

Equivalent diameter between screen/sheath and armour.

Symbol
$d_{e}$
Unit
mm
Formulae
$\sqrt{\frac{d_{a}^{2}}{2} + \frac{d_{s}^{2}}{2}}$with non-magnetic armour
$d_{s}$otherwise
Related
$d_{a}$
$X_{0}$
$X_{S1}$
Reactance section 1 [$\Omega$/m]
$X_{S2}$
Reactance section 2 [$\Omega$/m]
$X_{S3}$
Reactance section 3 [$\Omega$/m]