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Substitution coefficient $g_s$ for eddy-currents

Symbol
$g_s$
Formulae
$1+\left(\frac{t_{sc}+t_{scs}+t_{sh}}{D_{sh}}\right)^{1.74} \left({10}^{-3}\beta_1 D_{sh}-1.6\right)$Cables, considering screen and sheath
$1+\left(\frac{t_{sh}}{D_{sh}}\right)^{1.74} \left({10}^{-3}\beta_1 D_{sh}-1.6\right)$Cables, considering only sheath
$1+\left(\frac{t_{encl}}{D_{encl}}\right)^{1.74} \left(\beta_1 D_{encl}-1.6\right)$PAC/GIL
Related
$\beta_1$
Substitution coefficient $\beta_1$ for eddy-currents
$D_{encl}$
Outer diameter of enclosure [m]
$D_{sh}$
Diameter over sheath [mm]
$t_{encl}$
Thickness of enclosure [m]
$t_{sc}$
Thickness of the screen [mm]
$t_{scs}$
Thickness of screen serving [mm]
$t_{sh}$
Thickness of the sheath [mm]
Used in
$\lambda_{12}$
Loss factor of shield by eddy currents