1. The equivalent circuit impedances of a single phase 10-KVA, 480/120 V, 60 Hz transformer are to be determined. The open circuit and short circuit test results as performed on the primary side is as follows. Open-circuit test Short-circuit test Voc = 480 V loc = 0.41 A Poc = 38 W Vsc = 10.0 V Isc = 10.6 A Psc = 26 W %3D %3D |3| %3D %3D %3D a) Find the impedances of the approximate transformer equivalent circuit referred to the primary side, and sketch the circuit. b) What are the impedances when referred to the secondary side. Sketch the resulting circuit.

1. The equivalent circuit impedances of a single phase 10-KVA, 480/120 V, 60 Hz transformer are to be determined. The open circuit and short circuit test results as performed on the primary side is as follows. Open-circuit test Short-circuit test Voc = 480 V loc = 0.41 A Poc = 38 W Vsc = 10.0 V Isc = 10.6 A Psc = 26 W %3D %3D |3| %3D %3D %3D a) Find the impedances of the approximate transformer equivalent circuit referred to the primary side, and sketch the circuit. b) What are the impedances when referred to the secondary side. Sketch the resulting circuit.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.10P: A single-phase step-down transformer is rated 13MVA,66kV/11.5kV. With the 11.5 kV winding...

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