IEC 61363 - Ship Short-Circuit Current

Initial symmetrical short-circuit current (I_k) at a ship's main switchboard per IEC 61363-1 - used to verify switchgear breaking capacity.

Short circuitIEC 61363Fault

Generator ratingMVAX'd (subtransient)puLine voltageVGenerators in parallel

Gen rated current: 3,936A

Initial I_k: 52.5kA

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

I_k'' = \frac{I_n}{X_d''} \cdot n_{gen}

Symbol	Meaning	Unit
$I_n$	Generator rated current	A
$X_d''$	Subtransient reactance	pu
$n_{gen}$	Generators in parallel

Source: IEC 61363-1

In short

Initial symmetrical short-circuit current (I_k) at a ship's main switchboard per IEC 61363-1 - used to verify switchgear breaking capacity.

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