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Problem 3.3: A transformer has a no-load loss of 30 kW and full-load loss of 90 kW when delivering 3 MW power. Determine its (i) full load effi- ciency, and (ii) maximum efficiency with the corresponding loading level in percentage of the full load and in kW.

Problem 3.3: A transformer has a no-load loss of 30 kW and full-load loss of 90 kW when delivering 3 MW power. Determine its (i) full load effi- ciency, and (ii) maximum efficiency with the corresponding loading level in percentage of the full load and in kW.

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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Problem 3.3: A transformer has a no-load loss of 30 kW and full-load loss of 90 kW when delivering 3 MW power. Determine its (i) full load effi- ciency, and (ii) maximum efficiency with the corresponding loading level in percentage of the full load and in kW. Problem 3.4: A de source with open-circuit voltage of 120 V drops to 105 V under 15 A load. Determine its Thevenin parameters, that is, the source voltage V, and the source resistance R.
Transcribed Image Text:Problem 3.3: A transformer has a no-load loss of 30 kW and full-load loss of 90 kW when delivering 3 MW power. Determine its (i) full load effi- ciency, and (ii) maximum efficiency with the corresponding loading level in percentage of the full load and in kW. Problem 3.4: A de source with open-circuit voltage of 120 V drops to 105 V under 15 A load. Determine its Thevenin parameters, that is, the source voltage V, and the source resistance R.
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