The circuit for a 20-kVA, 220/3960 V, 50-Hz transformer is shown in Figure (1). The open-circuit test and the short-circuit test was performed on this transformer and the followingdata were taken:Open-Circuit test: Voc=240 V, Ioc=2.8 A, Poc=260 WShort-Circuit test: Vsc = 350 V, Isc=7.6 A, Psc = 420 W1) Find the values of Rc, XM, Rp and Xs for this transformer.2) Find the equivalent circuit of this transformer referred to the high-voltage side and drawthe circuit.j 0.163 QjXM0.02 02jXs

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The circuit for a 20-KVA, 220/3960 V, 50-Hz transformer is shown in Figure (1). The open- circuit test and the short-circuit test was performed on this transformer and the following data were taken: Open-Circuit test: Voc=240 V, loc=2.8 A, Poc=260 W Short-Circuit test: Vsc = 350 V, Isc = 7.6 A, Psc = 420 W 1) Find the values of Rc, XM, Rp and Xs for this transformer. 2) Find the equivalent circuit of this transformer referred to the high-voltage side and draw the circuit. j 0.163 Q jXM 0.02 2 Mm jxs

The circuit for a 20-KVA, 220/3960 V, 50-Hz transformer is shown in Figure (1). The open- circuit test and the short-circuit test was performed on this transformer and the following data were taken: Open-Circuit test: Voc=240 V, loc=2.8 A, Poc=260 W Short-Circuit test: Vsc = 350 V, Isc = 7.6 A, Psc = 420 W 1) Find the values of Rc, XM, Rp and Xs for this transformer. 2) Find the equivalent circuit of this transformer referred to the high-voltage side and draw the circuit. j 0.163 Q jXM 0.02 2 Mm jxs

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 3.11P: For the transformer in Problem 3.10. The open-circuit test with 11.5 kV applied results in a power...

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