arunbabu,

The more information the better the answer.

Short-Circuit Calculation Methods

It is apparent that you have never had to make this calculation. You have provided none of the information required. Lyn has provided you a good method to make this calculation. Let us know how you come out.

The short circuit current is depending on the total impedance of your system.

Simply divide your voltage to the total impedance of your system. The result is your short circuit current.

Kindest Regards

data is inadequate

for 230V, Isc = 230/ short circuit resistance

for 415V, Isc = ( 1.732 *230)/ short circuit resistance for 1phase fault