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2.4 A 240/24 V single phase transformer has the following parameters: R1 = 6 ohm, X1 = 20 ohm, R2 = 0.05 ohm and X2 = 0.18 ohm. When the transformer is supplied at 240 V on no-load, the primary current is 0.02 A at a power factor of 0.3 lagging. Determine the following when the transformer secondary is connected to a load of (3.9 + j1.9) ohm and the primary is supplied at 240 V. (d) The % efficiency of the transformer.

2.4 A 240/24 V single phase transformer has the following parameters: R1 = 6 ohm, X1 = 20 ohm, R2 = 0.05 ohm and X2 = 0.18 ohm. When the transformer is supplied at 240 V on no-load, the primary current is 0.02 A at a power factor of 0.3 lagging. Determine the following when the transformer secondary is connected to a load of (3.9 + j1.9) ohm and the primary is supplied at 240 V. (d) The % efficiency of the transformer.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Electrical Machines 2.4b please round off to 2 decimal places

2.4 A 240/24 V single phase transformer has the following parameters: R1 = 6 ohm, X1 = 20 ohm, R2 = 0.05 ohm and X2 = 0.18 ohm. When the transformer is supplied at 240 V on no-load, the primary current is 0.02 A at a power factor of 0.3 lagging. Determine the following when the transformer secondary is connected to a load of (3.9 + j1.9) ohm and the primary is supplied at 240 V. (d) The % efficiency of the transformer.
Transcribed Image Text:2.4 A 240/24 V single phase transformer has the following parameters: R1 = 6 ohm, X1 = 20 ohm, R2 = 0.05 ohm and X2 = 0.18 ohm. When the transformer is supplied at 240 V on no-load, the primary current is 0.02 A at a power factor of 0.3 lagging. Determine the following when the transformer secondary is connected to a load of (3.9 + j1.9) ohm and the primary is supplied at 240 V. (d) The % efficiency of the transformer.
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