Short Circuit Current Formula. Calculate the short circuit current. Isubsc 100 zsubt x isubs 100 2 5 417 16 680a.
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With the help of the basic formula we can easily calculate the short circuit current at the fault location and with the help of those values we can analyze the system and install protective devices and protect the facility from any major harm or damage. In this case you need a breaker who s fault current breaking capacity is more than 2624 1a or 2 6ka. So first we need to calculate secondary full load current isec.
Isec secondary side full load current of the transformer.
Peak value of the short circuit current. Determine the short circuit current isubsc at the transformer s secondary terminals per its impedance. Calculate the short circuit current. So first we need to calculate secondary full load current isec.
