The voltage from the source is stepped up by the first ideal transformer and then stepped down by the second ideal transformer before the load is delivered. The impedance at the middle is Zm=40+j30 ohms and sees some voltage source at its left side and some impedance on the right side. The load is known to consume 1.2kW and 300Vars as shown in the first figure. Use the current accross the impedance at the middle as the reference phasor where Im=4∠0° A. If there were no transformers used, i.e. Vs is directly connected to Zm and ZL, what will be the real power and reactive power drawn from the source respectively?

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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.