Initial symmetrical short-circuit current (I_k) at a ship’s main switchboard per IEC 61363-1 - used to verify switchgear breaking capacity.
Formula
$$ I_k’’ = \frac{I_n}{X_d’’} \cdot n_{gen} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $I_n$ | Generator rated current | A | machine data |
| $X_d’'$ | Subtransient reactance | pu | generator data |
| $n_{gen}$ | Generators in parallel | - | operation mode |
Sources
- IEC 61363-1.