Question: A 3 MVA, 7 2 / 7 . 2 kV , 5 0 Hz single - phase transformer has a total impedance of 1 2

3

MVA,

72 / 7.2

, 50

Hz single

-

phase transformer has a total impedance of

127

with respect to the primary. Find the primary and secondary currents. Determine the voltage regulation when a

2000

kW resistive load is connected, keeping the supply voltage constant. Determine what the primary and secondary currents will be if the secondary is suddenly short

-

circuited.

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