A certain 60-Hz, 20-kVA, 8000/240 V-rms transformer is
Chapter 15, Problem P15.76(choose chapter or problem)
A certain 60-Hz, 20-kVA, 8000/240 V-rms transformer is operated with a shortcircuited secondary and reduced primary voltage. It is found that, for an applied primary voltage of 500 V rms, the primary current is 2.5 A rms (i.e., this is the rated primary current) and the transformer absorbs 270 W. Consider the equivalent circuit of Figure 15.29(b) on page 740. Under the stated conditions, the current and power for Lm and Rc can be neglected. Explain why. Determine the values of the total leakage inductance referred to the primary (L1 + a2L2) and the total resistance referred to the primary (R1 + a2R2).
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