Ratio of the permissibe current when taking into account the presence of crossing heat sources to the permissible current of the insulated cable (derating factor).

Symbol
$DF_{\mathrm{X}}$
Unit
-
Formulae
$\sqrt{- \frac{\Delta \theta_{\mathrm{0x}}}{- \Delta \theta_{\mathrm{d}} + \Delta \theta_{\mathrm{max}}} + 1}$
Related
$\Delta \theta_{\mathrm{0x}}$
$\Delta \theta_{\mathrm{d}}$
$\Delta \theta_{\mathrm{max}}$
Used in
$I_{\mathrm{c}}$