Cableizer ®

Short-circuit current, adiabatic

Short-circuit current calculated on an adiabatic basis (r.m.s over duration).

Symbol
$I_{kAD}$
Unit
kA
Formulas
$\sqrt{\frac{{K_{k}}^2 {S_{k}}^2 \ln\left(\frac{\theta_{kf}+\beta_{k}}{\theta_{ki}+\beta_{k}}\right)}{t_{k}}}$calculation of short-circuit current
$\frac{I_{kSC}}{\epsilon_{k}}$calculation of short-circuit temperature
Related
$\beta_{k}$
Reciprocal of temperature coefficient metallic component [K]
$\epsilon_{k}$
Heat loss allowance factor
$I_{kSC}$
Short-circuit current, effective [kA]
$K_{k}$
Specific short-circuit parameter [A.s$^{1/2}$/mm$^2$]
$S_{k}$
Cross-sectional area metallic component [mm$^2$]
$t_{k}$
Duration of short-circuit [s]
$\theta_{kf}$
Final temperature [°C]
$\theta_{ki}$
Initial temperature [°C]
Used in
$I_{k,per}$
Short-circuit current, permissible [kA]
$\theta_{kf}$
Final temperature [°C]