Example: A single-phase, 100-kVA, 1000:100-V, 60-Hz transformerhas the following test results:Open-circuit test (HV side open): 100 V, 6 A, 400 WShort-circuit test (LV side shorted): 50 V, 100 A, 1800 WDraw the equivalent circuit of the transformer referred to the high-voltage side. Label impedances numerically in ohms and in perunit.Determine the voltage regulation at rated secondary current with0.6 power factor lagging. Assume the prirated voltageary is supplied withDetermine the efficiency of the transformer when the secondarycurrent is 75% of its rated value and the power factor at the load is0.8 lagging with a secondary voltage of 98 V across the load

TRANSFORMER: The transformer transfers power from one circuit to another circuit without a change…

Answered: Example: A single-phase, 100-kVA,…

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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Similar questions

Find the elements of the equivalent circuit relative to the secondary of a single-phase transformer. The no-load voltages in the primary and secondary circuits are 200,400 volts, respectively, at a frequency of 50 Hz The primary no-load current at voltage 200 equals 0.7 amps and pulp losses equal to 70 watts Primary resistance and reactance 3.2 , 1.25 In order, the reactance of the resistance and the coil 0.6 , 0.7 Then draw the equivalent circle, explaining the values
A 10kVA, 2400/240 V, 60HZ single phase transformer has Zp =5.2+j2.5 ohms and Zs = 0.06+0.12 ohms. When operating at rated primary voltage and frequency. The transformer delivers rated current to its load at 0.8 pf lagging. Find the load voltage in volts. Neglect no load current. round off answer to whole number
a single-phase transformer serves a 7.2kw resistive loadlocated 200 ft from the transformer. each conductor from the transformer to load has an impedence of (0.78+j0.052) ohms per 1000ft. if the voltage at the load terminal is 240v, the magnitude of the voltage (v) at the transformer secondary is most nearly:
The equivalent circuit impedances of a 20-kVA, 8000/240-V, 60-Hz transformer are to be determined. The open-circuit test and the short- circuit test were performed on the primary side of the transformer, and the following data were taken: Open-circuit test (on primary) Short-circuit test (on primary) 8000 V V= 489 V I0.214 A 2.5 A P= 400 W P= 240 W Find the impedances of the approximate equivalent circuit referred to the primary side, and sketch the circuit.
A single phase 220/6 Volt, 50 Hz transformer has a rated primary current = 0.5 A. its maximum efficiency is at load current = 15 A and equal to 94% at unity p.f. Its efficiency at rated load, 0.65 p.f. lagging is: 087.8%. 092.3%. 090.9%. ONone.
Q5:Choose the correct answer from the given alternatives (answer five only) 1.In an ideal transformer, (a) windings have no resistance (b) core has infinite permeability (d) all of the above. (c) core has no losses 2. The primary and secondary induced e.m.fs. El and E2 in a two-winding transformer are always: (a) equal in magnitude (b) in-phase with each other (c) antiphase with each other (d) determined by load on transformer secondary. 3. In relation to a transformer, the ratio 20 : 1 indicates that (a) there are 20 turns on primary one turn on secondary (b) secondary voltage is 1/20th of primary voltage (c) primary current is 20 times greater than the secondary current. (d) for every 20 turns on primary, there is one turn on secondary. 4. A transformer has negative voltage regulation when its load power factor is: (a) zero (b) lagging. (d) unity (c) leading
A 30 KVA , 2400/120 V ,50hz, transformer a high voltage winding resistance of 0.1 ohm and leakage reactance of 0.22 ohm .The low voltage winding resistance is 0.035 ohm and the leakage reactance is 0.012 ohm. Calculate a) Equivalent resistance as impedance as referred to both primary and secondary b) Copper loss at full load.
calculate the iron loss P; and copper loss Peu of each transformer for full load condition.
The maximum efficiency of a 200KVA, 6000/230volt, 50HZ, single phase transformer occurs at half load and is 95% at unity power factor. What is the full load efficiency at 0.7 power factor?

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