Question A step-down transformer has primary voltage 1100 V. The ratio of turns of primary to secondary coil is 5 : 1. If the primary current is 10A then what is the secondary voltage and secondary current assuming the transformer to be an ideal transformer?

Question A step-down transformer has primary voltage 1100 V. The ratio of turns of primary to secondary coil is 5 : 1. If the primary current is 10A then what is the secondary voltage and secondary current assuming the transformer to be an ideal transformer?

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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Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

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Experimental Values: 200 800 100 1002 Table - Measured Values Input voltage Input Current Output Voltage Output current Vp [V] Ip [A] Vs [V] Is [A] 5.1 0.916 15 0.166
Ideal transformer.
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4. Why the efficiency of the transformer is high at half load compared to full load?
Calculate the total equivalent resistance, in terms of the primary winding, of a 10 to 1 ratio transformer in which the primary copper loss is 20 per cent greater than the secondary copper loss, given that the resistance of the secondary (low tension) winding is 1.5 ohms.
b) The parameters of the transformer equivalent circuit are given bellow, Primary =1290. Secondary winding turns =130. The resistance of the primary winding =0.2 O. The resistance of the secondary winding =0.06 N. The leakage reactance of the primary winding =1.47 Q. The leakage reactance of the secondary winding =0.07 Q. using the above parameter values, referred to the primary winding, determine (a) Equivalent resistance, (b) Equivalent reactance, (c) Equivalent impedance and (d) The phase angle of the impedance.
1. A 1000-VA 350/140-V transformer has been tested to determine its equivalent circuit. The results of the tests are shown below. Open-circuit test Short-circuit test Voc = 235 V Vsc = 20.1 V loc = 0.57 A Isc = 9.6 A Poc = 34.3 w Psc = 42.7 W All data given were taken from the primary side of the transformer. Evaluate the equivalent circuit of this transformer referred to the low-voltage side of the transformer.