Substitution coefficient $g_s$ for eddy-currents

Symbol
$g_{s}$
Formulae
$\left(\frac{t_{sc} + t_{scs} + t_{sh}}{D_{s}}\right)^{1.74} \left(0.001 D_{s} \beta_{1} - 1.6\right) + 1$cable
$\left(\frac{t_{encl}}{d_{encl}}\right)^{1.74} \left(0.001 \beta_{1} d_{encl} - 1.6\right) + 1$GIL
$t_{encl}$