3- A 5 kVA 200/1000 V, 50 Hz, single-phase transformer gave the following test results:O.C. Test (L.V. Side): 200 V, 1.2 A, 90 WS.C. Test (H.V. Side): 50 V, 5A, 110 WCalculate the parameters of the equivalent circuit referred to the L.V. side.Ans:- (Ro 444 £2, Xo = 180.2 2, Ro1 = 0.176 2, X01 = 0.362)=

Answered: 3- A 5 kVA 200/1000 V, 50 Hz,…

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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answer: 5.19 – j2.95 A
AC power of 100 volts and 1 ampere enters a transformer with 2 coils and exits the transformer with 20 coils. What is the exiting voltage and current? a.) 1000v/0.1amp b.) 0.1v/1000amp c.)1000v/1amp d.) 2v/20amp e.) No change
A 25 kVA, 2 kV(rms)/100 V(rms) single phase transformer is connected between a 120 V(rms) utility supply and a resistive load. The load current was measured to be 20 A(rms). i. Determine the active power of the load. ii. Determine the primary RMS current. iii. Determine the equivalent resistance of the transformer as seen by the utility supply.
A Buck converter has an output power of 1950 Watts, and a source voltage of 1000V (the constant DC voltage). Using the information provided and the "“transformer-like" relationships derived in class, estimate the corresponding load currents for the following duty ratios: a) D=0.35 b) D=0.9 c) D=0.5
quesntion in photo plz
3.6. A 60-kVA, 4800/2400-V single-phase transformer gave the following test results: 1. Rated voltage is applied to the low voltage winding and the high volt- age winding is open-circuited. Under this condition, the current into the low voltage winding is 2.4 A and the power taken from the 2400 V source is 3456 W. 2. A reduced voltage of 1250 V is applied to the high voltage winding and the low voltage winding is short-circuited. Under this condition, the current flowing into the high voltage winding is 12.5 A and the power taken from the 1250 V source is 4375 W. (a) Determine parameters of the equivalent circuit referred to the high volt- age side. (b) Determine voltage regulation and efficiency when transformer is operat- ing at full-load, 0.8 power factor lagging, and a terminal voltage of 2400 V. (c) What is the load kVA for maximum efficiency and the maximum effi- ciency at 0.8 power factor? (d) Determine the efficiency when transformer is operating at 3/4 full-load, 0.8 power…
Example 2-2. 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) Voc = 8000 V Vsc = 489 V loc = 0.214 A Isc = 2.5 A Voc = 400 W Ps = 240 W
Following are the results of a test carried out on a 230/600 V single phase, 7.5 kVA transformer. O.C. Test : 230 V, 1.2 A, 280 W, on L.V side S.C. Test : LV winding is shorted. 26 V, 11A, 155 W, H.V. Both the full load efficiency and full load regulation of the transformer on the side are 0.8 lagging p.f Search on.
Please explain each step
A voltage transformer in Figure 8 has 1,500 turns of wire on its primary winding and 500 turns of wire for its secondary winding. What will be the turns ratio, a of the transformer. If 240 volts is applied to the primary winding, what will be the resulting secondary voltage. And if a 400 n resistor is connected to the secondary winding, what are the values of current Is and Ip. primary Vp Transformer Core NF Ns Figure 8 secondary Vs
Determine Rz for a 12 V Zener regulator is used with a dc input of 20 V, a load current of 65 mA, and a Zener current of 20 mA. Rz DC Input Zener R diode 91.4 ohms O 14.9 ohms 49.1 ohms O 94.1 ohms
If the secondary side of a dual-voltage single phase transformer, as per figure 1, were to be connected in series, the rated output current would be equal to the -A- current rating of the individual coils, B- sum of the current rating of the individual coils, C- either "a" or "b", D- neither "a" nor "b". If secondary side of the a dual-voltage single phase transformer, as per figure 1, were to be connected in paralle, the rated output current would be equal to the A- current rating of the individual coils, B- sum of the current rating of the individual coils, C- either "a" or "b", D- neither "a" nor "b". The poles of a magnet tend to be____________. A - at the ends of the magnet, B- in the middle of the magnet, C -all around the magnet, D- none of the above.

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