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Short-circuit current (adiabatic)

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

Symbol
$I_{kAD}$
Unit
kA
Formulae
$\sqrt{\frac{{K_k}^2 {S_k}^2 \ln\left(\frac{\theta_{kf}+\beta_k}{\theta_{ki}+\beta_k}\right)}{t_k}}$calculation of short-circuit current
$\frac{I_{kSC}}{\epsilon_k}$calculation of short-circuit temperature
Related
$\beta_k$
Reciprocal of temperature coefficient of resistance [K]
$\epsilon_k$
Heat loss allowance factor
$I_{kSC}$
Effective short-circuit current [kA]
$K_k$
Specific short-circuit parameter [A.s$^{1/2}$/mm$^2$]
$S_k$
Cross-sectional area of current carrying component [mm$^2$]
$t_k$
Duration of short-circuit [s]
$\theta_{kf}$
Final temperature [°C]
$\theta_{ki}$
Initial temperature [°C]
Used in
$I_{k,per}$
Permissible short-circuit current [kA]
$\theta_{kf}$
Final temperature [°C]