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Radius of screen (inner)

Definition according to Cigré guide 531 chapter 4.2.2.5 for composite screen and sheath

Symbol
$r_{z2,sc}$
Unit
m
Formulae
$\left(\frac{d_{sc}}{2}-t_{sc}\right) \frac{1}{1000}$
Related
$d_{sc}$
Mean diameter of screen [mm]
$t_{sc}$
Thickness of the screen [mm]
Used in
$\mathscr{z}_{3,s}$
Impedance of shield inner surface [$\Omega$/m]
$\mathscr{z}_{3,sc}$
Impedance of screen inner surface [$\Omega$/m]
$\mathscr{z}_{4,s}$
Mutual impedance of shield [$\Omega$/m]
$\mathscr{z}_{4,sc}$
Mutual impedance of screen [$\Omega$/m]
$\mathscr{z}_{5,s}$
Impedance of shield outer surface [$\Omega$/m]
$\mathscr{z}_{5,sc}$
Impedance of screen outer surface [$\Omega$/m]