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Transformer output current @ Different tap

MG
Hi all,


Say we have a distribution transformer which has a nominal current output. If this transformer is tapped at the primary should we assume that the power rating of the transformer is constant and as such the output current will change to satisfy the constant power rating?


I.E. 1MVA, 11kV/433V transformer has a nominal output current of 1333 A. If the primary is tapped at +5%, then to satisfy the transformer apparent power rating remaining constant means the output current now is increased by 5% at 1400A.


Thanks
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    Yes and no. The tapping is normally adjusted to compensate for the 11kV voltage, so a 1000 kVA is usually taken as 1333A and a 500 as 666A, as it is adjusted for 433V on no load. 


    Regards,


    Alan.
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    Yes and no. The tapping is normally adjusted to compensate for the 11kV voltage, so a 1000 kVA is usually taken as 1333A and a 500 as 666A, as it is adjusted for 433V on no load. 


    Regards,


    Alan.
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