A single phase 22 kVA 2200 V 220 V 50 Hz distribution transformer is to be connected as an auto transformer to get an output

Question

A single phase 22 kVA 2200 V 220 V 50 Hz distribution transformer is to be connected as an auto transformer to get an output voltage of 2420 V Its maximum kVA rating as an auto transformer is 1 2 22 24 2 3 242 2100

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