2. A 1-kVA three phase transformer has 500 turns on the primary and 100 turns on the secondary winding, the transformer connection is shown in the following figure, if the transformer supplied with a 400-V, 50-Hz supply, calculate the following: a) Primary rated line current; b) Secondary line voltage; c) Secondary rated phase current. A в Primary side H2 H1 H2 H1 Hz H1 www X2 X1 X2 X1 Secondary side Fig.1

2. A 1-kVA three phase transformer has 500 turns on the primary and 100 turns on the secondary winding, the transformer connection is shown in the following figure, if the transformer supplied with a 400-V, 50-Hz supply, calculate the following: a) Primary rated line current; b) Secondary line voltage; c) Secondary rated phase current. A в Primary side H2 H1 H2 H1 Hz H1 www X2 X1 X2 X1 Secondary side Fig.1

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

In single phase transformer, if the primary turns N1 is greater than the secondary turns N2, then what is the relation between V1 and V2? a.V1 < V2 b.V2 > V1 c.V1 > V2 d.V1 = V2
In single phase transformer, if the secondary turns N2 is greater than the primary turns N1, then what is the relation between V2 and V1? O a. V2 = V1 O b. V2 > V1 O c. V1 < V2 O d. V2 < V1
B- the eddy current losses of 400V, 50 Hz transformer is 1600W and the total iron losses i 2500W. calculate the iron losses at 200V, 25 Hz.
A 120 kVA, 1350/330 V single phase transformer has the following parameters: R1 = 0.34 Q, X1 = 0.59 0, R2 = 0.014 Q, X1 = 0.029 Q, Rc = 380 and Xm = 320 Q. The no load current is 4.7 A at a power factor of 0.36 lagging and the no load losses are 4.6 kW. For a full load and 0.9 power factor lagging with 300 V load terminal voltage, determine (a) equivalent circuit parameters referred to primary side, (b) percentage regulation and (c) full load efficiency. O:01 AM
Figure 5 shows the core of a Linear Variable Differential Transformer (LVDT). S, S2 CORE Figure 5 Explain what happens when the core is at its maximum left, null and maximum right positions.
A single-phase transformer has the following resistances: R1 = 3 ohms, X1 = 6 ohms, R2 = 6 ohms and X2 = 10 ohms. Find the turns ratio (N1/N2) if the sum of the equivalent resistances (Re1 + Re2) is 46.98 ohms.
4. 100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters: RLs-0.008Ω RHs-2.6Ω Ri-HS-500 0Ω XLS-0.015Ω XHs=5.22 Xm,HS=88002 Transformer is delivering 80% of rated load at rated voltage and 0.95 lagging power factor. Determine the following: a) The equivalent impedance of the transformer referred to primary. b) Input impedance of the combined transformer and load. c) Actual input voltage at HV side. d) Input impedance if load is disconnected. e) Exciting current at no load.
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.
4. Using L equivalent circuit in a 220/100 V phase transformer with equivalent circuit parameters; R1 = 0.2 ohm, R2 = 0.025 ohm, X1 = 0.3 ohm, X2 = 0.075 ohm, Xm = 5k ohm, Rre = 45k ohm, a.) Draw the approximate equivalent circuit and reduce the secondary circuit parameters to primary. b.) Since the reduced value of the load connected to the secondary circuit to the primary is given as 44.72 + j32.01 ohms, calculate the magnetization current, primary current, load current, primary and secondary copper losses by using the approximate equivalent circuit. ( please solve all the options,thanks..)
9. Electrical transformer is shown on the figure bellow. Secondary winding Ng turns Primary winding N, tums Magnetic Flux. Primary Secondary current current Primary votage Secondary valtage Transformer Core The ratio between the voltages at the secondary U, and the primary Up windings is equal to: U. b) U, N U а) U, N. U, , c) = 1 N, N U, P