Three 20-kVA, 24KV/277V distribution transformers are connected in A-Y. The open circuit testwas performed on low-voltage side of this three-phase transformer bank and the following datawas recorded: Vine,OC = 480 V, Ijine.Oc = 4.25 A, and P3p. OC = 950 W.The short-circuit test was performed on the high-voltage side and the following data wererecorded: Vine sc = 1400V, Iine, Sc = 2A, and P3p sc = 900 W.Find the equivalent circuit for this transformer bankb. Find the voltage regulation for this transformer bank at the rated load and 0.9 pf lagging.

we need to find equivalent circuit and voltage regulation for the given transformer.

Answered: Three 20-kVA, 24KV/277V distribution…

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...

See similar textbooks

Similar questions

Draw a block diagram of a power supply from transformer up to regulator with corresponding waveform.
don't copy
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
A 50 Hz, Scott connected transformer supplies an unbalanced two phase load at ( 400 V) per phase. For the leading phase the load has a resistance of (13.3 ohm) and capacitor of (318) micro farad in series. For the other phase the load consists of resistance (10) ohm and an inductance of (42.3) mH. Calculate both mathematically and graphically the lines currents on 3-phase side. The main transformer primary to secondary turns ratio is (12/1).
Ql-phase step down transformer 1250 KVA, 10002200 V, 50 Hz The resistance /phase and leakage reactanceiphase of the primary winding are 0.78 2 and 4.82 and the corresponding values for the secondary winding are 0.012 and 0.002 respectively if the primary winding is connected in delta and secondary in star calculate: )The voltage to be applied at normal frequency to the primary to circulate full-load through it when the secondary is short-circuited li) The full load copper loss
4. 100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters: RLs=0.0082 RHs=2.62 Rfe-HS=50002 XLs=0.015N XHs=5.2N 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.
what is the turns ratio or voltage ratio of the two transformers?
A 36/240 V phase transformer, belonging to a phase measured from the no-load (idle) run and short-circuit test. values are given in the table below. High voltage by applying rated voltage to the low voltage winding (The winding ends were left unloaded and the results of the no-load test results were obtained. By applying nominal current to the high voltage windings, the low voltage windings were short-circuited, and the results of the short circuit test were obtained. In direct current test 1 V direct voltage is applied to the low voltage winding, and the transformer draws 500 A direct current. All equivalent Calculate the circuit elements as moved to the low voltage side. Idle run test: Voltage : 36V Power : 68W Current : 2,8A Short circuit test: Voltage : 15V Power : 325W Current : 42,2A
A 10 MVA three phase load is to be served by a three phase transformer at aline voltage of 13.8 kV. The supply side voltage(line-line) is 138 kV. Varioussingle phase transformers are available in the warehouse but all havewindings with voltage ratings under 100 kV and current ratings under 250 A.Is it possible to serve the load using only three single phase transformers? Ifso, specify the three phase connections and the low and high voltage ratingsof the single phase transformers.
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.
In part c determine the voltage across Rp and Xp .
What's The procedure of open circuit test on single phase transformer?

Recommended textbooks for you

Introductory Circuit Analysis (13th Edition)

Electrical Engineering

ISBN:

9780133923605

Author:

Robert L. Boylestad

Publisher:

PEARSON

Delmar's Standard Textbook Of Electricity

Electrical Engineering

ISBN:

9781337900348

Author:

Stephen L. Herman

Publisher:

Cengage Learning

Programmable Logic Controllers

Electrical Engineering

ISBN:

9780073373843

Author:

Frank D. Petruzella

Publisher:

McGraw-Hill Education

Introductory Circuit Analysis (13th Edition)

Electrical Engineering

ISBN:

9780133923605

Author:

Robert L. Boylestad

Publisher:

PEARSON

Delmar's Standard Textbook Of Electricity

Electrical Engineering

ISBN:

9781337900348

Author:

Stephen L. Herman

Publisher:

Cengage Learning

Programmable Logic Controllers

Electrical Engineering

ISBN:

9780073373843

Author:

Frank D. Petruzella

Publisher:

McGraw-Hill Education

Fundamentals of Electric Circuits

Electrical Engineering

ISBN:

9780078028229

Author:

Charles K Alexander, Matthew Sadiku

Publisher:

McGraw-Hill Education

Electric Circuits. (11th Edition)

Electrical Engineering

ISBN:

9780134746968

Author:

James W. Nilsson, Susan Riedel

Publisher:

PEARSON

Engineering Electromagnetics

Electrical Engineering

ISBN:

9780078028151

Author:

Hayt, William H. (william Hart), Jr, BUCK, John A.

Publisher:

Mcgraw-hill Education,

SEE MORE TEXTBOOKS