Impact factor

According to ECT185 Calculation of short-circuit currents (SchneiderElectric2005), chap. 3.4

Typical values are 1.8 for high and 1.4 for medium voltage cable.

Symbol
$\kappa_k$
Formulas
$1.02+0.98e^{-3\frac{R_c}{X_1}}$
Related