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Question 1 An ideal two winding transformer with a rectangular cross-sectional area of 60cm by 20cm and transformation ratio 0.02 draws a magnetising current of 1.6A when the angle of displacement is 53.13º. It is realised that when the terminal voltage is 220V, at 50HZ, a load current of 200A at 0.8p.f. lagging flows in the secondary. Assuming 400 turns in the transformer secondary windings, a. calculate current drawn from the primary b. calculate the efficiency of the transformer C. calculate the resistance and inductance of the core d. calculate the maximum flux density in the core e. sketch a reflective and labelled phasor diagram

Question 1 An ideal two winding transformer with a rectangular cross-sectional area of 60cm by 20cm and transformation ratio 0.02 draws a magnetising current of 1.6A when the angle of displacement is 53.13º. It is realised that when the terminal voltage is 220V, at 50HZ, a load current of 200A at 0.8p.f. lagging flows in the secondary. Assuming 400 turns in the transformer secondary windings, a. calculate current drawn from the primary b. calculate the efficiency of the transformer C. calculate the resistance and inductance of the core d. calculate the maximum flux density in the core e. sketch a reflective and labelled phasor diagram

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
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Question 1 An ideal two winding transformer with a rectangular cross-sectional area of 60cm by 20cm and transformation ratio 0.02 draws a magnetising current of 1.6A when the angle of displacement is 53.130. It is realised that when the terminal voltage is 220V, at 50HZ, a load current of 200A at 0.8p.f. lagging flows in the secondary. Assuming 400 turns in the transformer secondary windings, a. calculate current drawn from the primary b. calculate the efficiency of the transformer C. calculate the resistance and inductance of the core d. calculate the maximum flux density in the core e. sketch a reflective and labelled phasor diagram
Transcribed Image Text:Question 1 An ideal two winding transformer with a rectangular cross-sectional area of 60cm by 20cm and transformation ratio 0.02 draws a magnetising current of 1.6A when the angle of displacement is 53.130. It is realised that when the terminal voltage is 220V, at 50HZ, a load current of 200A at 0.8p.f. lagging flows in the secondary. Assuming 400 turns in the transformer secondary windings, a. calculate current drawn from the primary b. calculate the efficiency of the transformer C. calculate the resistance and inductance of the core d. calculate the maximum flux density in the core e. sketch a reflective and labelled phasor diagram
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