Moving to another question will save this response. Question 12 of 42> >> Question 12 Save Answer A short transmission line connects a step-up transformer on the source side with a series Impedance of 10.5 ohms (referred to the primary) to a step-down transformer on the load side with a series impedance of 50 ohms (referred to the primary. The turn ratio of the step-up transformer is 1:10 and a no-load primary voltage of 23 (line-to-line) KV. The step-down transformer has a turn ratio of 35:2 and it has a Y-connected, balanced load of 0.490 +0.0816 ohms connected to its secondary side. A capacitor bank of j0.171 ohms is added parallel to the load Assuming an ideal transmission line, the load voltage (ine-to-neutral) would be: ⒸA 4900 V 8.12750V OC. None of the other choices are correct 0.7380 V OE62 KV

Moving to another question will save this response. Question 12 of 42> >> Question 12 Save Answer A short transmission line connects a step-up transformer on the source side with a series Impedance of 10.5 ohms (referred to the primary) to a step-down transformer on the load side with a series impedance of 50 ohms (referred to the primary. The turn ratio of the step-up transformer is 1:10 and a no-load primary voltage of 23 (line-to-line) KV. The step-down transformer has a turn ratio of 35:2 and it has a Y-connected, balanced load of 0.490 +0.0816 ohms connected to its secondary side. A capacitor bank of j0.171 ohms is added parallel to the load Assuming an ideal transmission line, the load voltage (ine-to-neutral) would be: ⒸA 4900 V 8.12750V OC. None of the other choices are correct 0.7380 V OE62 KV

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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A Cock-croft Walton type voltage multiplier has 7 stages with capacitance all equal 0.07pF. The supply a frequency of to be supplied is 6.5mA. to transformer secondary voltage is 133kV at 250HZ. If the load current The total voltage ripple of the system is: (a) 15.3kv (b) 12.2kv (c) 9.1kV (d) 10.4kv (e) 1.9kv a. d O b. a OC C O d. e O e. b
Please answer all subparts than i will like a. A current transformer (CT) is rated 200/5 and has a secondary current of 4.0 A. Determine the primary current. b. A 150/5 CT has the primary conductor looped to pass through the donut three times. If the secondary current is 3.0 A, determine the primary current. c. A 60/5 CT has the primary looped to pass through the donut two times. With 25 A in the primary, determine the secondary current. d. A voltage (potential) transformer is rated for 14.4 kV / 115 V and is used to measure the voltage on an industrial power line. If the voltmeter indicates 111 V, calculate the voltage in the power line.
2.Fringing effect is a phenomena occurs in .. (a)Transformers. (bElectrical field. (e)Air gap (d)All of the above. 3, The kVA rating of an ordinary 2-winding transformer is increased when connected as an autotransformer because (@ transformation ratio is increased (b) secondary voltage is increased (c) energy is transferred both inductively and conductivity (d) secondary current is increased. 4. The .... of the hysteresis loop is a measure of energy lost per cycle (a) area. (b) Туре. (c) Frequency (d) No one of the above. 5. At relatively light loads, transformer efficiency is low because (a) secondary output is low (b transformer losses are high (c) fixed loss is high in proportion to the output (d) Cu loss is small. 6. In an ideal transformer, (a) windings have no resistance (b) core has no losses (c) core has infinite permeability (d) all of the above. 7. In electromagnetic circuits, path of eddy current is.... (a) Parallel to the path of the flux. (b) Perpendicular to the path of…
Current transformer has Select one: O a. No relation between primary windings and its secondary windings O b. More secondary windings than its primary windings O C. Primary windings equal to secondary windings O d. More primary windings than its secondary windings
In a single phase transformer, when no-load voltage is 230V and full load terminal voltage is 220, then the percentage regulation is 4.54%. Select one: True False
2. What is tap changing of transformer? Why it is needed?
4. 100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters: RIs=0.0082 Rus=2.62 Rfc-HS=5000n XLs=0.0152 Xus=5.2 XmHs=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.
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.
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
In part c determine the voltage across Rp and Xp .
A short transmission line connects a step-up transformer on the source side with a series impedance of j0.5 ohms (referred to the primary) to a step-down transformer on the load side with a series impedance of 50 ohms (referred to the primary). The turn ratio of the step-up transformer is 1:10 and a no-load primary voltage of 23 (line-to-line) kV. The step-down transformer has a turn ratio of 35:2 and it has a Y-connected, balanced load of 0.490 +j 0.0816 ohms connected to its secondary side. A capacitor bank of -j0.171 ohms is added parallel to the load. Assuming an ideal transmission line, the load voltage (line-to-neutral) would be: O A. 7360 V O B. 6.2 kV O C. 12750 V O D. 4806 V O E. None of the other choices are correct