Activity 5: Check for Understanding (5 mins)3. Calculate all listed values for this transformer circuit:Rai37 VAC13000 turms4000 turns1.5 k2Vprimary =Vsecondary =Iprımary =Isecondary =Explain whether this is a step-up, step-down, or isolation transformer, and also explainwhat distinguishes the "primary" winding from the "secondary" winding in any transformer.

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Answered: %3D %3D Vprimary Vsecondary Iprimary…

Engineering

Electrical Engineering

%3D %3D Vprimary Vsecondary Iprimary Isecondary = Explain wh what distin

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter28: Three-phase Transformers

Section: Chapter Questions

Problem 4RQ: An open-delta three-phase transformer system has one transformer center-tapped to provide a neutral...

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Similar questions

An open-delta three-phase transformer system has one transformer center-tapped to provide a neutral for single-phase voltages. If the voltage from line to center tap is 277 V, what is the high-leg voltage?
A two-winding single-phase transformer rated 60kVA,240/1200V,60Hz, has an efficiency of 0.96 when operated at rated load, 0.8 power factor lagging. This transformer is to be utilized as a 1440/1200-V step-down autotransformer in a power distribution system. (a) Find the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the ratings as a two-winding transformer. Assume an ideal transformer. (b) Determine the efficiency of the autotransformer with the kVA loading of part (a) and 0.8 power factor leading.
What is the purpose of a transformer? Draw the symbols for a transformer.
A single-phase l0-kVA,2300/230-volt,60-Hz two-winding distribution transformer is connected as an autotransformer to step up the voltage from 2300 to 2530 volts (a) Draw a schematic diagram of this arrangement, showing all voltages and currents when delivering full load at rated voltage. (b) Find the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the rated values as a two-winding transformer. How much of this kVA rating is transformed by magnetic induction? (C) The following data are obtained from tests carried out on the transformer when it is connected as a two-winding transformer: Open-circuit test with the low-voltage terminals excited: Applied voltage =230V, input current =0.45A, input power =70W. Short-circuit test with the high-voltage terminals excited: Applied voltage =120, input current =4.5A, input power =240W. Based on the data, compute the efficiency of the autotransformer corresponding to full load, rated voltage, and 0.8 power factor lagging. Comment on why the efficiency is higher as an autotransformer than as a two-winding transformer.
An infinite bus, which is a constant voltage source, is connected to the primary of the three-winding transformer of Problem 3.53. A 7.5-MVA,13.2-kV synchronous motor with a sub transient reactance of 0.2 per unit is connected to the transformer secondary. A5-MW,2.3-kV three-phase resistive load is connected to the tertiary Choosing a base of 66 kV and 15 MVA in the primary, draw the impedance diagram of the system showing per-unit impedances. Neglect transformer exciting current, phase shifts, and all resistances except the resistive load.
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
Rework Problem 3.14 if the transformer is delivering rated load at rated secondary voltage and at (a) unity power factor, (b) 0.8 power factor leading. Compare the results with those of Problem 3.14. -
A 4.6-kVA, 308 / 155 -volt distribution transformer has the following equivalent resistance and leakage-reactance values referred to the primary: rep = 1.5 ohm; xep = 7.5 ohms. The core losses of this transformer amount to 500 watts. If this transformer is operating at full-load unity power factor, what is its percent efficiency?
19.A 25kVA, 2400/240, 60Hz single phase transformer gave the following short circuit test result Vsc = 100V, Isc = 10.41A, Psc = 116. Find the equivalent resistance in ohms referred to primary. Assume Ip rated is equal to Isc. round off answer to 4 decimal places if necessary.
Show all steps and working please. You have been hired as an engineering consultant to diagnose an overheating and low output voltage problem with a three-phase transformer. The service technicians informed you that the transformer has a solid nickel core, insulated aluminum windings and a single phase of the transformer is rated at 50 kVA, 6900/400 V, 60 Hz. The transformer cannot be disconnected for open and short circuit testing and only the input lines and output outlets are accessible for current and voltage measurements. (a) The following measurements were taken after and during working hours when all the electrical devices were off and on,respectively. No load condition: Input Phase Current = 3∠−60°A, Output Voltage = 400∠0°V Load condition: Input Phase Current = 8.45∠−37.35°A, Output Voltage = 370∠−0.64°V Assuming the input voltage is maintained at its rated value, calculate the modelled internal parameters Ro, Xm, Reqand Xeq of the transformer referred to the high voltage…
1-) A phase transformer with equivalent circuit parameters R1 = 1 ohm, R2 '= 1.4 ohm, X1 = 2 ohm, X2' = 1.8 ohm, Xm = 1100 ohm, Rre = 6400 ohm, the idle primary voltage is 220 volts and the secondary voltage is 22 volts. a.) Calculate the actual values of the parameters of the secondary side. b.) Calculate the idle running iron and magnetizing currents and transformer losses in idle operation. c.) The transformer is connected to the network whose voltage does not change and it feeds a load with impedance Zy = 0.5 + j0.3 ohms. In this operating condition, calculate the secondary voltage of the transformer and the active and reactive powers drawn from the secondary side by using the T equivalent circuit. ( please solve them all,thanks..)
I ONLY NEED B PART III ANSWERED. NO OTHER PART OF THE QUESTION. You have been hired as an engineering consultant to diagnose an overheating and low output voltage problem with a three-phase transformer. The service technicians informed you that the transformer has a solid nickel core, insulated aluminum windings and a single phase of the transformer is rated at 50 kVA, 6900/400 V, 60 Hz. The transformer cannot be disconnected for open and short circuit testing and only the input lines and output outlets are accessible for current and voltage measurements. (a) The following measurements were taken after and during working hours when all the electrical devices were off and on,respectively. No load condition: Input Phase Current = 3∠−60°A, Output Voltage = 400∠0°V Load condition: Input Phase Current = 8.45∠−37.35°A, Output Voltage = 370∠−0.64°V Assuming the input voltage is maintained at its rated value, calculate the modelled internal parameters Ro, Xm, Reqand Xeq of the transformer…