Answer Posted / elangovan kp

Isc (Shot circuit Current ) = Full load current of Tranformer / Impedance(%)

Ex: for 1000 KVA, 11/0.415 KV Transformer , Percentage Impedance - 6% :

Full load current of LV side of Transformer = 1000 * 1000 / ( 415 * 1.732)

= (1391 / 6) * 100

= 23187 Amps.

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