A 200 kVA, 60 Hz, 4600/230 volt transformer has thefollowing characteristics:R;=2.25 QR,=0.005 NCore Loss ( W. ) = 1500 watts; the no-loadX,=13.4 QX2=0.03 0current is 1.5 A. Determine the voltage regulation atunity power factor and draw the vector diagram .Assume that the transformer is operated at ratedsecondary terminal voltage of 230 volts.

Answered: Image /qna-images/answer/a913df06-8ad9-4f1b-b29a-a01c00ba5df8.jpg

A 200 kVA, 60 Hz, 4600/230 volt transformer has the following characteristics: R;=2.25 Q R,=0.005 N Core Loss ( W. ) = 1500 watts; the no-loa X,=13.4 Q X2=0.03 0 current is 1.5 A. Determine the voltage regulation unity power factor and draw the vector diagram Assume that the transformer is operated at rat secondary terminal voltage of 230 volts.

A 200 kVA, 60 Hz, 4600/230 volt transformer has the following characteristics: R;=2.25 Q R,=0.005 N Core Loss ( W. ) = 1500 watts; the no-loa X,=13.4 Q X2=0.03 0 current is 1.5 A. Determine the voltage regulation unity power factor and draw the vector diagram Assume that the transformer is operated at rat secondary terminal voltage of 230 volts.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.14MCQ: The ideal transformer windings are eliminated from the per-unit equivalent circuit of a transformer....

See similar textbooks

Similar questions

An ideal transformer has no real or reactive power loss. (a) True (b) False
In developing per-unit circuits of systems such as the one shown in Figure 3.10. when moving across a transformer, the voltage base is changed in proportion to the transformer voltage ratings. (a) True (b) False
The ideal transformer windings are eliminated from the per-unit equivalent circuit of a transformer. (a) True (b) False
For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the rated voltage on the other winding? (a) Yes (b) No
Consider an ideal transformer with N1=3000andN2=1000 turns. Let winding 1 be connected to a source whose voltage is e1(t)=100(1| t |)volts for 1t1ande1(t)=0 for | t |1 second. A2- farad capacitor is connected across winding 2. Sketch e1(t),e2(t),i1(t),andi2(t) versus time t.
For an ideal 2-winding transformer, the ampere-turns of the primary winding, N1I1 is equal to the ampere-turns of the secondary winding, N2I2 (a) True (b) False
7. The primary of a single-phase transformer takes 1 A at power factor of 0.4 when connected to a 240-V, 50-Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 50 A at a lagging power factor of 0.8 is now connected across the secondary. What is now the value of the primary current ? transformer.) (Neglect the voltage drops in the
A transformer has a reactive drop of 6% and a resistive drop of 2.5%. Determine the lagging power factor at which the voltage regulation is maximum and the value of this regulation.[0.385 lag]
A 50 Hz 1-phase transformer has a turn-ratio of 6. The resistances are 0.90 ohm and 0.03 ohm and the reactance’s 5 ohm and 0.13 Q for high voltage and low voltage respectively. Determine (a) the voltage to be applied to the high voltage side to obtain full load current of 200 A in the low voltage winding on short circuit (b) the p.f. on short circuit.
An ideal transformer circuit is shown in Figure Q4(a). Its primary and secondary turns are 400 and 200 respectively. (1) Calculate the rms primary current. (ii) Calculate the rms flux in the transformer core. (iii) State two losses that contribute to transformer active power loss that have been ignored in this ideal model. N, Ny 30 + j30 2 300 sin50t Figure Q4(a) 00000000
A 250/125 V, five kVA single-phase transformer has a primary resistance of 0.2 ohms and reactance of 0.75 ohms. The secondary resistance is 0.05 ohm and reactance of 0.2 ohms.a) Determine its regulation while supplying full load on 0.8 leading p.f.b) The secondary terminal voltage on full load and 0.8 leading p.f.Ans.: -0.4.88%; 131.1
The primary ofa certain transformer takes 1 A at a power factor of 0.4 when connected across a 230 V, 50 Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 50 A at a lagging power factor of 0.8 is now connected across the secondary. Sketch, and explain briefly, the phasor diagram for this condition, neglecting voltage drops in the transformer. What is now the value of the primary current?