The equivalent circuit of a 50 kVA 2400/240 V transformer is shown below. The transformer is connected to 0.8 pf lagging load at rated voltage at secondary terminals at rated kVA. The transformer efficiency and voltage regulation are found to be 97% and 2% respectively. It was found that copper loss 600 W. The impedance seen at primary terminals is 110 40° 2. Take Rei 1.21 2 and Rea- 90.41 2. Find Xmz and Xet Re1 Xe1 E E Xm2 Ra

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Z parameter

The Z-parameters that are the impedance parameters of a two-port network are defined by expressing the two-port voltages V1 and V2 in terms of two-port currents I1 and I2. The Z-parameters are calculated by open circuiting one of the two ports at a time henceforth they are called open-circuit impedance parameters.