why the value of impedence is taken as %impedence in fault currrent calculatio

why the value of impedence is taken as %impedence in fault
currrent calculation

Question Posted / anil.prince

why the value of impedence is taken as %impedence in fault currrent calculation..

Percentage impedance = Full load current x impedance x
100/rated voltage . It is the percentage voltage drop at
full load ,in the tr.

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