The resistance and reactance of a 100 kVA, 11000/400V, A - Y distribution transformer are 0.02 p.u. and 0.07 p.u. respectively. The phase impedance of the transformer referred to the primary is

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Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.