2. The effective primary and secondary resistances of a 500 kVA, 12,000/2400 volt60 cycle transformer are 1.52 and 0.049 Q, and the corresponding leakagereactance are 6.4 n and 0.26 Q. Determine the equivalent complex impedancereferred to high side. (

Answered: Image /qna-images/answer/d162eb78-9c8f-4244-bb7a-02225b69e793.jpg

2. The effective primary and secondary resistances of a 500 kVA, 12,000/2400 volt 60 cycle transformer are 1.52 n and 0.049 0, and the corresponding leakage reactance are 6.4 n and 0.26 N. Determine the equivalent complex impedance referred to high side. (

2. The effective primary and secondary resistances of a 500 kVA, 12,000/2400 volt 60 cycle transformer are 1.52 n and 0.049 0, and the corresponding leakage reactance are 6.4 n and 0.26 N. Determine the equivalent complex impedance referred to high side. (

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.14MCQ: The ideal transformer windings are eliminated from the per-unit equivalent circuit of a transformer....

See similar textbooks

Related questions

Q: and a 500-KVA, 1-phase transt ers are connected to the s ame bus-bars on the primary side. The…

A: Please find your answer below

Q: True or False? Consider a 3 phase transformer with same line to line voltage ratio. The delta…

A: Delta to Delta transformer: The primary phase current is,I1=13IL1The secondary phase currennt…

Q: Consider a bank of three single-phase two-winding transformers whose high-voltage terminals are…

A: Two connected windings on the same core are modelled by the single-phase two-winding transformer.…

Q: A 100 KVA, 2000/200V 1-phase 2-winding Transformer is to be used as an auto transformer for stepping…

Q: A three phase Y/A transformer rated at 50 MVA, 230/34.5 kV is to be protected using biased…

Q: A three-phase generator step-up transformer i

Q: A 250 MVA, 11/400 kV 3-phase power transformer has a leakage reactance of 0.05 pu on the base of 250…

A: Given values are - Rating=250MVAVLVH=11400Xpu=0.05

Q: Problem-13 A50-kVA, 13,800/208-V, 4-Y distribution transformer has a resistance of 1 percent and a…

Q: A 200 – MVA, 15/200 kV single-phase power transformer has a per – unit resistance of 1.2 percent…

A: Part (1): Consider the base voltage to be 15 V and the base MVA to be 200 MVA. Since the base…

Q: Neglecting resistance, transformer phase shift, and magnetizing reac- tance, draw the equivalent…

Q: 2. If a 250MVA,11/400 KV, Three –Phase power Transformer has leakage reactance of 0.05 pu on the…

Q: 2. A 3-phase, 6,600/415-V, 2,000-kVA transformer has a per unit resistance of 0.02 and a per unit…

Q: The diagram for a single phase 60 MVA transformer is given below. Convert it to a Step-down…

A: Design the step down autotransformer Single phase transformer have 60MVA 50/100kV Find the all…

Q: Consider that three single-phase transformers are connected as Delta in the primary and Wye in the…

Q: The open circuit test in a 100 kVA, 2000/200 V, 50 Hz, single phase transformer gives 200 V, 90 A, 5…

Q: A single phase 500/200 V ,55HZ transformer has an efficiency of 98% at full-load. Determine the…

A: Given input frequency = 55 Hz and no load terminal voltage = 200 volts full load terminal voltage =…

Q: A single phase transformer with 50 kVA, 2400V/240V, 50 Hz; Idle operating voltage 2400V, idle…

Q: Impedance of single phase., two winding transformer referred to primary side is 0.1 + j0.6 p.u. The…

A: Given values are - S=1kVAZPP.U=0.1+j0.6V1V2=200400

Q: What are the advantages of the star/star connected transformer? And why it is preferred by many…

A: advantages of the star/star connected transformer?

Q: You have been tasked with comparing the transformer from ABC Ltd. with a 65 kVA, 11000 V/415 V, 50…

A: Given R1=10 ΩR2 =0.05 ΩX1 =20 ΩX2 =0.12 ΩXm =20 kΩRc = 200 kΩS =65 kVApower factor =0.8V2V1=11000415

Q: 1. Consider a three-phase transformer with a rating of 700 MVA and a secondary voltage of 145 kv.…

Q: transformer (A) having a rating of 2000 KVA is connected in parallel with transformer (B) with 4000…

Q: We wish to connect a 6 kVA, 120/240 V transformer as an autotransformer to a 120 V source to supply…

A: "Since you have posted a question with multiple sub parts we will solve first three subpart for you…

Q: The results of open-circuit test and short-circuit test for a 60 kVA , 2400/500 V single phase…

A: In this question, open-circuit test and short-circuit test for a 60 kVA , 2400/500 V single phase…

Q: Explain the importance of transformer and basic insulation level in the distribution system. Justify…

A: The detailed answer to the given question is solved below according to the given parameters and…

Q: Example: A single-phase, 100-kVA, 1000:100-V, 60-Hz transformer has the following test results:…

Q: During short-circuit test of a transformer, the core loss of a transformer is negligible. Select…

A: In this answer we will discuss whether the core loss of a transformer is less / not when conducting…

Q: Two transformers rated at 100 kVA each are connected in an open-delta connection. What is the total…

A: NOTE: We’ll answer the first question since the exact one wasn’t specified. Please submit a new…

Q: Consider a single phase transformer of rating 150 KVA, 3600/360, 50 Hz. Let the series resistance…

A: Formula to calculate voltage required to produce rated current at short circuit is: VSC=V1×ZPUwhere…

Q: The per-unit system calculations method allows to: Select one: O a. eliminate the need for explicit…

A: Most of human energy requirement is meet by generating electrical energy. Once electrical energy is…

Q: Iron loss and copper loss in a 25 kVA, 200/200 volt single phase transformer are 400 watts and 500…

Q: 9. While conducting short short circuit test in a transformer, which side is short circuited?

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: Consider a single phase transformer of rating 150 KVA, 1500/150, 50 Hz. Let the series resistance…

A: Given: Z1=R1+jX1=0.2+j0.45 ΩZ2=R2+jX2=0.002+j0.0045 ΩKVA=150

Q: Q/ The efficiency of a 400-kVA, single-phase, 60-Hz transformer is 98.77% when delivering full-load…

Q: The following test data were obtained from short-circuit and open-circuit tests of a 50-kVA,…

A: Given data Apparent power is S = 50 kVA Voltage is V = 600 V frequency is f = 60 Hz a) Calculating…

Q: In a transformer test, data from short circuit and open circuit tests of a 75-kVA, 4600-230V, 60Hz…

A: a) Using the given data cosϕo=POCVOCIOC=521230×13.04=0.174 Magnetizing reactance,…

Q: A 40 kVA, 6,600/250V, 50 Hz transformer is having total reactance of 35 ohms when referred to…

A: Given Data: Rating = 40 kVA R1 = 10 ohm R2 = 0.2 ohm E1 = 6600 V E2 = 250 V

Q: A single-phase two-winding transformer rated 90 MVA, be connected as an autotransformer rated 80/200…

Q: Example 22: In a single-phase transformer, the magnitude of leakage reactance is twice that of…

A: Given that magnitude of leakage reactance of transformer is twice that of resistance of primary and…

Q: The nameplate on a 7.97-kV:266-V, 25-kVA single-phase transformer indicates that it has a series…

A: Given: Series reactance, Xs=7.5%=0.075pu V=7.97KV/266V S=25KVA a)Series reactance in both the sides.…

Q: Power transformer A, has Rated power of 150MVA. Line voltage of 330/66 kV Frequency=50Hz Connection…

A: The Figure shows the load sharing in two transformers referred to HV side. V2 = E2A -IAZA…

Q: A 50-kVA 13.8-kV/208-V (rms, line-line) ∆−Ythree-phase distribution transformer has a per-unit…

A: Dear student as per our guidelines we are supposed to solve only one question in which it should…

Q: A single-phase, 10-kVA, 480/120-V transformer is to be used as an autotransformer tying a 600-V…

A: The base impedance referred to the primary side is determined as: Zb=(480 V)210 KvA=23.04 ohmFor…

Q: ratio

Q: 4. Calculate the full-load primary and secondary currents of a 5-kva 2,400/120-volt transformer.

A: Given power S = 5KVA Primary voltage PV = 2400 Full load primary current = S/PV = 5000/2400 =…

Q: TRUE or FALSE: Purchasing three single-phase transformer bank cost less than one three-phase…

A: In this question we will write in which connection cost is less i.e Purchasing three single-phase…

Q: (b) A 40-kVA, 2600/1300-V, single-phase transformer has a core loss of 620 W. The transformer has a…

A: The solution is given below

Q: The per-unit system calculations method allows to: Select one: O a. improve the efficiency of the…

A: In the power systems analysis, Per Unit values are defined for per phase only not for 3 phase . A…

Q: single-phase 50-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down…

Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

2. The effective primary and secondary resistances of a 500 kVA, 12,000/2400 volt
60 cycle transformer are 1.52 and 0.049 Q, and the corresponding leakage
reactance are 6.4 n and 0.26 Q. Determine the equivalent complex impedance
referred to high side. (

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A single-phase 50-kVA,2400/240-volt,60-Hz distribution transformer is used as a step-down transformer at the load end of a 2400-volt feeder whose series impedance is (1.0+j2.0) ohm. The equivalent series impedance of the transformer is (1.0+j2.5) ohms referred to the high-voltage (primary) side. The transformer is delivering rated load at a 0.8 power factor lagging and at a rated secondary voltage. Neglecting the transformer exciting current, determine (a) the voltage at the transformer primary terminals, (b) the voltage at the sending end of the feeder, and (c) the real and reactive power delivered to the sending end of the feeder.
The ratings of a three-phase three-winding transformer are Primary(1): Y connected 66kV,15MVA Secondary (2): Y connected, 13.2kV,10MVA Tertiary (3): A connected, 2.3kV,5MVA Neglecting winding resistances and exciting current, the per-unit leakage reactances are X12=0.08 on a 15-MVA,66-kV base X13=0.10 on a 15-MVA,66-kV base X23=0.09 on a 10-MVA,13.2-kV base (a) Determine the per-unit reactances X1,X2,X3 of the equivalent circuit on a 15-MVA,66-kV base at the primary terminals. (b) Purely resistive loads of 7.5 MW at 13.2 kV and 5 MW at 2.3kV are connected to the secondary and tertiary sides of the transformer, respectively. Draw the per- unit impedance diagram, showing the per-unit impedances on a 15-MVA,66-kV base at the primary terminals.
A single-phase, 50-kVA,2400/240-V,60-Hz distribution transformer has the following parameters: Resistance of the 2400-V winding: R1=0.75 Resistance of the 240-V winding: R2=0.0075 Leakage reactance of the 2400-V winding: X1=1.0 Leakage reactance of the 240-V winding: X2=0.01 Exciting admittance on the 240-V side =0.003j0.02S (a) Draw the equivalent circuit referred to the high-voltage side of the transformer. (b) Draw the equivalent circuit referred to the low-voltage side of the transformer. Show the numerical values of impedances on the equivalent circuits.
A single-phase two-winding transformer rated 90MVA,80/120kV is to be connected as an autotransformer rated 80/200kV. Assume that the transformer is ideal. (a) Draw a schematic diagram of the ideal transformer connected as an autotransformer. showing the voltages, currents, and dot notation for polarity. (b) Determine 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 the kA rating is transferred by magnetic induction?
Consider a bank of this single-phase two-winding transformers whose high-voltage terminals are connected to a three-phase, 13.8-kV feeder. The low-voltage terminals are connected to a three-phase substation load rated 2.0 MVA and 2.5 kV. Determine the required voltage, current, and MVA ratings of both windings of each transformer, when the high-voltage/low- voltage windings are connected (a) Y-, (b) -Y, (c) Y-Y, and (d) -.
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.
For an ideal 2-winding transformer, the ampere-turns of the primary winding, N1I1 is equal to the ampere-turns of the secondary winding, N2I2 (a) True (b) False
A single-phase 100-kVA,2400/240-volt,60-Hz distribution transformer is used as a step-down transformer. The load, which is connected to the 240-volt secondary winding, absorbs 60 kVA at 0.8 power factor lagging and is at 230 volts. Assuming an ideal transformer, calculate the following: (a) primary voltage, (b) load impedance, (c) load impedance referred to the primary, and (d) the real and reactive power supplied to the primary winding.
A single-phase 50-kVA,2400/240-volt,60-Hz distribution transformer has a 1-ohm equivalent leakage reactance and a 5000-ohm magnetizing reactance referred to the high-voltage side. If rated voltage is applied to the high-voltage winding, calculate the open-circuit secondary voltage. Neglect I2RandGc2V losses. Assume equal series leakage reactances for the primary and the referred secondary.
Three single-phase, two-winding transformers, each rated 450MVA,20kV/288.7kV, with leakage reactance Xeq=0.10perunit, are connected to form a three-phase bank. The high-voltage windings are connected in Y with a solidly grounded neutral. Draw the per-unit equivalent circuit if the low-voltage windings are connected (a) in with American standard phase shift or (b) in Y with an open neutral. Use the transformer ratings as base quantities. Winding resistances and exciting current are neglected.
The ideal transformer windings are eliminated from the per-unit equivalent circuit of a transformer. (a) True (b) False
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