1. Find the all-day efficiency of a transformer having maximum efficiency of 96% at 30-kVA load at UPF. If during the day the transformer is loaded as follows: 12 hours....... ...5 kW at 0.6 p.f. lagging ......24 kW at 0.8 p.f. 6 hours... agging 6 hours...... ..at no-load.

1. Find the all-day efficiency of a transformer having maximum efficiency of 96% at 30-kVA load at UPF. If during the day the transformer is loaded as follows: 12 hours....... ...5 kW at 0.6 p.f. lagging ......24 kW at 0.8 p.f. 6 hours... agging 6 hours...... ..at no-load.

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: For a multiplexer based bus system in an 8 bit computer system a- What is the MUX size we use? b-…

A: Given 8 bit computer system with 4 registers. we need to find the MUX size,no of MUX required and no…

Q: The power dissipated in Diode D1 is D2 power R1k ww D₁ 1N4007 R 100 k 230 V AC CRO D₂ 5.6V, 400 mW…

A: The solution is given below

Q: If A = 5V and B = 5V, find Vo. (Rc = 500, Rb1 = Rb2 = 5k. Assume beta = 100 and Vce,sat = 0.2V) +5V…

Q: 4- In order to increase VUTP in triangular wave oscillator, R3 must: a- Increase b- Decrease c- Not…

A: 1. In order to increase Vutp we should decrease the resistance as it is inversely proportional to…

Q: Statistic question for signals please help. Let Z(t)=X(t)+Y(t), where X(t) and Y(t) are independent…

Q: Write the mesh equations for the network of Fig. 18.69. Determine the current through the resistor…

A: In this question we will write mesh equation and will find current through R1.....

Q: A three-phase squirrel cage induction machine with rated frequency of f = 50 Hz has a rated slip Sn…

Q: Q4 A 500-V, 37.3 KW, 1000 r.p.m. d.c. shunt motor has on full-load an efficiency of 90 percent. The…

A: In this question, We need to determine the full load line current IL and full load shaft torque?…

Q: 10

A: for our policy i can solve first three questions

Q: Capacitor Problem Set. 8.9 Find the total capacitance Cr of the circuit shown in Fig. 8-7.

Q: #6.) If A = 5V and B = 5V, find Vo. (Rc = 500, Rb1 = Rb2 = 5k. Assume beta = 100 and Vce,sat = 0.2V)…

A: The solution is given below

Q: 1. What is the effect of the diode voltage drop on the output of the clipping circuit in Fig.4?…

Q: 7.5k2 Q4 5 ΚΩ, Q₁ -15V +15V :5K2 Voz O₂ 5KR -oVoz K₂Q3 1.2KS2 Consider the BJT differential…

A: Given The transistor parameters are: Beta n = 180 VBE (on) = 0.65V; and VA = 60V. And from the…

Q: 15 X has has CDF :16 A continuous X Co F(x1= ==== X 0 KX CI 18X Find value of k V-V. 17 18 19 20 21

A: We need to find out value of unknown for given cdf .

Q: = (4) A feedback system has the loop transfer function (s)H(s) 20(s+0.1)/[s(s+4)(s+8)]. Determine…

A: In this question we will solve corner frequencies and slope at low and high frequencies....

Q: If A = OV and B = 5V, find Z. (Assume Si diodes) D1 A до D2 Bo- R N

A: In this question we will find output Z...

Q: Transients: What is the time constant of the following circuit in milliseconds? R₂ R4 UO Parameters:…

A: Given, R1=2 ΩR2=3 ΩR3=1 ΩR4=5 ΩL=2 mH

Q: Q2 A An ac bridge marked A-B-C-D consecutively around the corners has the following impedance value;…

Q: The switch in the circuit has been in position b for a long period of time and at t = 0 it moves to…

A: In this question we will find inductor current and voltage etc....

Q: 8 A system's transfer function is G(s) 4s+1 sampled, what is the best range of the sampling…

A: sampling is done in order to make continous signal to discrete form. It is done at not less than…

Q: 4. Consider the IVP given below, which models "damped harmonic motion." 13 y"+y+y = cos(wt), y(0) =…

A: Consider the IVP given below: y''+y'+134y=cos(ωt) , y(0)=0, y'(0)=1 a) We need to find the transfer…

Q: Communication Fundamentals Second Year Homework 1 // AM transmitter has a total power (480kw) and…

Q: What suffix would you add to the word 'blame' to show you have done nothing wrong? O ed O ful O less…

A: given statement of

Q: It is my opinion. The room needs to be painted. * The room needs to be painted, it is my opinion. To…

A: 1) Option b To my opinion, the room needs to be painted Explanation : Option c and d are wrong…

Q: A loss less transmission line of length 50 cm with L = 10 µH/m, C = 40 pF/m is operated at 30 MHz.…

A: Given a loss less transmission line has, Length, l = 50 cm = 0.5 m Inductance, L = 10 μHm…

Q: Is the output true or false, I need the output step by step and a clear line please al = 25 dB al =…

A: Brief description : In the above given question they want to have a clarification about the given…

Q: 1. A more linear source follower VDD 100 Vio-M 500 ܚܠܕ M1 500 M2 V Consider the circuit on the left.…

A: The linear source follower circuit is shown below, Consider,VTH=4Vk=0.5 mA/V2VDD = 20VID2=2 mA

Q: A-An Owen Bridge is used to measure the properties of a sample of sheet steel 2 KHz. At balance, arm…

Q: A continuous. FIXE Find V-V. Lisx P (LEX (1) has X Orxci CDF

A: We need to find out probability of given function .

Q: Transients: What is the time constant of the following circuit in milliseconds? R2 R4 ULO…

Q: ts) Find I and I₂ лип 212 6V - 101 D₁ H 1(1 + 12V ≤ 42 Iz

Q: A transistor has ...... O one pn junction O 4 pn junctions O 3 pn junctions O2 pn junctions

A: There are two p-n junctions in the transistor. One junction is in between the emitter and the base…

Q: It's difficult for a person with a broken leg to---- O get ahead O come about *

A: Given sentence, 1. It's difficult for a person with broken legs........ The correct word in fill in…

Q: Find the Diode Current (ID), Diode Voltage (VD), and Load Voltage (VL)

A: In this question, We need to find the Diode Current (ID), Diode Voltage (VD), and Load Voltage…

Q: a. Find the necessary KVL/KCL equations to solve the problem. b. Compute for 1₁, 12, and 13 c.…

A: The required parameters can be calculated by using the kirchhoff's voltage law and ohms law.

Q: A transformer has an input of 78V and an output of 15V if the input is changed to 75V what would the…

Q: A telephone cable with R=52.5 KQ/Km, C=62 nF/Km, G=0 and L=1.1 mH/Km, find,x,ß,Vp and λ, length of…

A: Given data, A telephone cable has Resistance R=52.5 kΩ/km Capacitance C=62 nF/km Conductance G=0…

Q: A faire dice is tussed twice Find the Probability that the two faces are the same CLEAR

A: Solve the problem

Q: At t=0 S switch is closed. Initially the capacitor was uncharged. What is the steady state value of…

A: Given circuit: R1=3 ΩR2=5 ΩR3=5 ΩU=10 VC=20 μF Initially the capacitor was uncharged. The switch is…

Q: If VOH = 3V, find VIL. (Rc = 1k, Rb = 10k. Assume beta = 100 and Vce,sat = 0.2V) +5V vio Answer: Rb…

Q: Q4/A shunt type ohmmeter uses a basic meter with a full scale current of 2mA and an internal…

Q: 3. Consider a series RLC circuit with v. = 25 cos 10³t, R = 10 92, L 30 mH and C= 100µF. Calculate…

A: Given,vs=25cos103twhere,Vm=25Vrms=Vm2=252∠0°Inductive reactance XL=ωL=103×30×10-3…

Q: 2. Explain why Phasor and impedance diagrams have the same angles.

A: We are authorized to answer the first question since the exact one wasn’t specified. Please submit a…

Q: 2. Variable gain amplifier Consider the circuit on the right. Varying VG will let the non-inverting…

A: MOSFET is a metal oxide semiconductor field-effect transistor, it belongs to the family FET. It is…

Q: 3. Design a clipping circuit that will limit the output voltage to 5V when applying an input…

A: The clipping circuit can be designed by using the diode and the resistors. The diode should be…

Q: 2.63 Find the voltage gain vo/via for the difference amplifier of Fig. 2.16 for the case R₁ = R3 = 5…

A: Given: R1=R3=5kΩR2=R4=50kΩ

Q: MULTIPLE CHOICE Choose the letter of correct answer. You may choose MANY that apply. In the cutoff…

A: In this question we will write about cut off region of N-Mosfet....

Q: The power dissipated in Diode D1 is D2 power R 1k ww D₁ 1N4007 230 V AC 100 k D₂ 5.6V, 400 mW eeeee…

A: We need to select correct option

Q: Example2/ Draw the vand is as a function of time when the switch on at t=0 R3 S2 ↑ Vs Rr=00 > Ro

A: In this question we need to find Vs and Is as function of time

Q: Use the Mesh theorem to find į.? 12 V Μ 24 V 4Ω 8 Ω 3 Ω 4Ω 3A

Concept explainers

Maximum power transfer theorem

A resistive load will consume maximum power from a network when the load resistance is equal to the resistance of the network as viewed from the open-circuit terminals, with all energy sources removed leaving only the internal resistances. Physicist Moritz von Jacobi introduced the maximum power transfer theorem in 1940. Therefore, this theorem is also known as Jacobi's law.

Question

1. Find the all-day efficiency of a transformer having
maximum efficiency of 96% at 30-kVA load at UPF. If
during the day the transformer is loaded as follows:
12 hours....
6 hours...
.5 kW at 0.6 p.f. lagging
..24 kW at 0.8 p.f.
lagging
6 hours.....
..at no-load.

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 3

VIEW

Step by step

Solved in 3 steps with 3 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 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.
An ideal transformer has no real or reactive power loss. (a) True (b) False
For the transformer in Problem 3.10. The open-circuit test with 11.5 kV applied results in a power input of 65 kW and a current of 30 A. Compute the values for GcandBm in siemens referred to the high-voltage winding. Compute the efficiency of the transformer for a load of 10 MW at 0.8 p.f. lagging at rated 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.
The transformer of Problem 3.16 is supplying a rated load of 50 kVA at a rated secondary voltage of 240 V and at 0.8 posr factor lagging. Neglect the transformer exciting current. (a) Determine the input terminal voltage of the transformer on the high-voltage side. (b) Sketch the corresponding phasor diagram. (c) If the transformer is used as a step-down transformer at the load end of a feeder whose impedance is 0.5+j2.0, find the voltage VS and the power factor at the sending end of the feeder.
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.
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.
Consider Figure 3.4. For an ideal phase-shifting transformer, the imda nce is unchanged when it is referred from one side to the other. (a) True (b) False
Consider an ideal transformer with N1=3000andN2=1000 turns. Let winding 1 be connected to a source whose voltage is e1(t)=100(1| t |)volts for 1t1ande1(t)=0 for | t |1 second. A2- farad capacitor is connected across winding 2. Sketch e1(t),e2(t),i1(t),andi2(t) versus time t.
A three-phase transformer is rated 1000MVA,220Y/22kV. The Y-equivalent short-circuit impedance, considered equal to the leakage reactance, measured on the low-voltage side is 0.1. Compute the per-unit reactance of the transformer. In a system in which the base on the high-voltage side of the transformer is 100MVA,230kV what value of the per-unit reactance should be used to represent this transformer?
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?
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