Try the following Problems Problem I The equivalent circuit of a 50 kVA 2400/240 V transformer is shown below. The transformer is connected to 0.8 pf lagging load at rated voltage at secondary terminals at rated kVA. The transformer efficiency and voltage regulation are found to be 97% and 2% respectively. It was found that copper loss 600 W. The impedance seen at primary terminals is 110 40° 2. Take Rel = 1.21 2 and R2=90.41 2. Find Xm2 and Xel Re1 Xel E E Xm2 Rc2

Try the following Problems Problem I The equivalent circuit of a 50 kVA 2400/240 V transformer is shown below. The transformer is connected to 0.8 pf lagging load at rated voltage at secondary terminals at rated kVA. The transformer efficiency and voltage regulation are found to be 97% and 2% respectively. It was found that copper loss 600 W. The impedance seen at primary terminals is 110 40° 2. Take Rel = 1.21 2 and R2=90.41 2. Find Xm2 and Xel Re1 Xel E E Xm2 Rc2

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 3.28MCQ

See similar textbooks

Related questions

Q: AA-A three transformer bank, each of 10 KVA SL transformer become, disable and hence the circuit…

A: Since you have asked multiple questions in a single request, we will be answering only the first…

Q: 6. A single-phase, 225-kVA, 460/120-V transformer has 6% impedance and 96% efficiency. Find its…

A: In this question we need to find series R and X of the given transformer

Q: A 3-phase 100OKVA, 11000/416 transformer is delta-connected on the primary and star connected on the…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Consider the circuit in the figure below: a) What are the benefites of using the transformer in this…

A: Cut in voltage of silicon diode is 0.7V and cut in voltage of germanium diode is 0.3V. During…

Q: Find The primary current is ...... A * The primary power factor is ........ lagging *

Q: A transformer has 700 primary turns and 150secondary turns. The primary and secondary resistances…

Q: In a single phase transformer, when no-load voltage is 230V and full load terminal voltage is 220,…

Q: 11. A single-phase transformer has a voltage ratio on open-circuit of 3300/660-V. The primary and…

A: step-1Primary voltage V1=3300 vsecondary voltage V2=660 vprimary resistance R1=0.8𝞨secondary…

Q: Draw the scheme of a single-phase transformer with two secondary windings and mark the main symbols…

Q: A three-phase two winding transformer is rated 1200MVA, 24/345kV 50Hz. It has a leakage reactance of…

A: PU Kva = Actual KVA / Base KVA PU Voltage = Actual Voltage/ Base voltage In star connection, N1/N2…

Q: A transformer has equivalent resistance referred to secondary R02 and reactance referred to…

Q: Ехample 5: A transformer has 600 primary turns and 150 secondary turns. The primary and secondary…

Q: In no load phasor diagram of practical transformer, the magnetizing current is with flux 4. O In…

A: Given No load magnetizing current and flux relation

Q: short transmission line connects a step-up transformer on the source side with a series impedance of…

Q: In a transformer that has 10 times more turns on the secondary side (side 2) than on the primary…

A: The above question is based on the EMF equation of a transformer.

Q: A Cockcroft-Walton type voltage multiplier has six stages with capacitances, all equivalent to…

A: Given n=6 I= 6mA f=150-220 Hz C=0.03 micro farad Secondary voltage=100-200 kV Assumption We assume…

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

Try the following Problems
Problem I
The equivalent circuit of a 50 kVA 2400/240 V transformer is shown below. The
transformer is connected to 0.8 pf lagging load at rated voltage at secondary terminals
at rated kVA. The transformer efficiency and voltage regulation are found to be 97%
and 2% respectively. It was found that copper loss = 600 W. The impedance seen at
primary terminals is 110 40° 2. Take Rel = 1.21 2 and R2=90.41 2. Find Xm2 and
Xel
Re1
Xet
E
E Xm2
Re2

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

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 step-down transformer is rated 13MVA,66kV/11.5kV. With the 11.5 kV winding short-circuited, rated current flows when the voltage applied to the primary is 5.5 kV. The power input is read as 100 kW. Determine Req1andXeq1 in ohms referred to the high-voltage winding.
For an ideal 2-winding transformer, an impedance Z2 connected across winding 2 (secondary) is referred to winding 1 (primary) by multiplying Z2 by (a) The turns ratio (N1/N2) (b) The square of the turns ratio (N1/N2)2 (c) The cubed turns ratio (N1/N2)3
For an ideal transformer, the efficiency is (a) 0 (b) 100 (c) 50
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.
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.
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. -
The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d. air core transformer.
An ideal transformer has no real or reactive power loss. (a) True (b) False
A 23/230-kV step-up transformer feeds a three-phase transmission line, which in turn supplies a 150-MVA,0.8 lagging power factor load through a step-down 230/23-kV transformer. The impedance of the line and transformers at 230kVis18+j60. Determine the tap setting for each transformer to maintain the voltage at the load at 23 kV.
Consider the three single-phase two-winding transformers shown in Figure 3.37. The high-voltage windings are connected in Y. (a) For the low-voltage side, connect the windings in , place the polarity marks, and label the terminals a, b, and c in accordance with the American standard. (b) Relabel the terminals a, b, and c such that VAN is 90 out of phase with Va for positive sequence.
In per-unit equivalent circuits of practical three-phase transformers, under balanced thr-phase operation, in which of the following connect ions would a phase-shifting transformer come up? (a) Y-Y (b) Y- (c) -
(a) An ideal single-phase two-winding transformer with turns ratio at=N1/N2 is connected with a series impedance Z2 across winding 2. If one wants to replace Z2, with a series impedance Z1 across winding 1 and keep the terminal behavior of the two circuits to be identical, find Z1 in terms of Z2. (b) Would the above result be true if instead of a series impedance there is a shunt impedance? (c) Can one refer a ladder network on the secondary (2) side to the primary (1) side simply by multiplying every impedance byat2 ?