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| Teaching Since: | May 2017 |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
For a single-phase, 60-Hz transformer rated 500 kVA, 2400:480 V, following the notation of Figure 11.3.4, the equivalent circuit impedances in ohms are R1 = 0.06, R2 = 0.003, RC = 2000, and X1 = 0.3, X2 = 0.012, Xm = 500. The load connected across the low-voltage terminals draws rated current at 0.8 lagging power factor with rated voltage at the terminals.
(a) Calculate the high-voltage winding terminal voltage, current, and power factor.
(b) Determine the transformer series equivalent impedance for the high-voltage and low voltage sides, neglecting the exciting current of the transformer.
(c) Considering the T-equivalent circuit, find the Thévenin equivalent impedance of the transformer under load as seen from the primary high-voltage terminals.

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