Answer Posted / pankaj

THERE IS A SIMPLE CALCULATION IF ASSUMING INFINITE SOURCE
BUS THE MAX LEVEL OF FAULT AT LT SIDE OF A 11/0.433 5%
1000KVA TRANSFORMER CAN BE CALCULATED AS:

KVA*100/SQRT3*433*Z% kAMPS

1000*100/1.732*433*5 = 26.7kAMS

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