The following values ​​were seen in the measurements made separately by the primary and secondary of a 220/270 V phase transformer. R1 = 4 ohms, X1 = 4.6 ohms, R2 = 0.89 ohms, X2 = 1.79 ohms; R2T = 8.7 ohms, X2T = 8.8 ohms (total values ​​measured on the secondary side), Xm = 60 ohms, Rfe = 750 ohms, (using a T-type equivalent circuit) c.) Active and reactive powers drawn from the transformer d.) Calculate the efficiency of the transformer.

Delmar's Standard Textbook Of Electricity
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Chapter28: Three-phase Transformers
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The following values ​​were seen in the measurements made separately by the primary and secondary of a 220/270 V phase transformer.

R1 = 4 ohms, X1 = 4.6 ohms, R2 = 0.89 ohms, X2 = 1.79 ohms; R2T = 8.7 ohms, X2T = 8.8 ohms (total values ​​measured on the secondary side),

Xm = 60 ohms, Rfe = 750 ohms, (using a T-type equivalent circuit)

c.) Active and reactive powers drawn from the transformer

d.) Calculate the efficiency of the transformer.

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