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Plate values ​​of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V,...

Plate values ​​of a three-phase transformer are given below:
1600 kVA, 15 kV / 400 V, 50 Hz, io = 1.2%; ukN = 6%, idle losses 2450 W, rated
copper losses of power 14500 W; Dy5.
a) Calculate primary and secondary line and phase currents.
b) Secondary at 75% load in power factor with 0.85 inductance and 0.85 capacity
calculate the voltage separately. Compare and interpret the results. capacity
at what time of day can the upload be seen? To prevent voltage change
What solution should be applied?
c) Calculate the rated operating efficiency and maximum efficiency of the transformer.
d) Draw the fastening group. How is this transformer parallel with the transformer Dy11 connected
run?
e) If this transformer is operated at 60 Hz, which sizes change how?
Your review.

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