ANSWER THE FF. PROBLEM, ANSWERS MUST BE IN 2 DECIMAL PLACES AND DRAW AN ILLUSTRATION TO UNDERSTAND IT MORE. 2. The full-load copper losses of a 150-KVA transformer are three times its core loss and its maximumefficiency is 97.8 %. Calculate the half load efficiency of this transformer at 0.707 power factor at allcases.3. A 120 KVA transformer has a maximum efficiency of 98 % and this condition occurs at 10% under load,both at 0.9 pf. Calculate the efficiency at half-load, 0.8 power factor.4.A certain transformer has a maximum efficiency of 98 % and this condition occurs at 10% under load,both at unity pf. If its efficiency at quarter full-load, 0.8 power factor is 95.3%, calculate the KVA ratingof the transformer.

“Since you have posted multiple questions, we will provide the solution only to the first question…

2. The full-load copper losses of a 150-KVA transformer are three times its core loss and its maximum efficiency is 97.8 %. Calculate the half load efficiency of this transformer at 0.707 power factor at all cases.

2. The full-load copper losses of a 150-KVA transformer are three times its core loss and its maximum efficiency is 97.8 %. Calculate the half load efficiency of this transformer at 0.707 power factor at all cases.

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 3.7P: Consider a source of voltage v(t)=102sin(2t)V, with an internal resistance of 1800. A transformer...

See similar textbooks

Related questions

Q: a) Calculate the capacitance of a parallel-plate capacitor whose plates are 20 x 3 cm and are…

A: We need to find out capacitance and electric field and charge and area for given capacitor.

Q: There are two parts. For each part, determine the mode (saturation "S" or triode "T"), then compute…

Q: INVERSE LAPLACE TRANSFORM ( NEED ONLY HANDWRITTEN SOLUTION PLEASE OTHERWISE DOWNVOTE).

Q: The transfer function of a compensator is given as s + a s+b Ge(s) is a lead compensator if Ge(s) =…

A: In this question We need to choose the correct option What is conditions of a and b for lead…

Q: For the following circuit, find Thevenin's and Norton equivalent circuit. 2.5 www 5L V jan m 35.0…

A: In this question We need to determine the Thevenin equivalent and Norton equivalent across the…

Q: 1. Determine the equivalent impedance across 'a' and 'b'. j180 5.0 Coo M 5.290 j110 ao be (0) j120…

Q: A separately excited 300 V DC shunt motor under no load runs at 900 rpm drawing an armature current…

A: 300 V DC shunt motor under no load- Speed N1=900 rpm, Armature current Ia1 =2 A, Armature…

Q: The impedance Z in the balanced three-phase cir- cuit in Fig. P11.19 is 100- j75 N. Find a) IAB,…

A: Given is three phase balanced Delta delta circuit . In delta circuit , Line voltage and phase…

Q: c) Modify the code shown in figure 2, so that the LED turns ON as Yellow for 250 ms and then OFF for…

A: Aim: To modify the given code such that the LED turns ON Yellow for 250ms and the LED remains OFF…

Q: In this given diagram of a BJT amp Circuit Solve for hie, R'in, Vo

Q: Problem 1: Introduction to energy processing. In a short report, explain the concept of power…

A: Step-1-> Power processing is the management and conversion of electrical power in modern…

Q: The frequency of the supply to the stator of 6 poles induction motor is 40 Hz and the rotor…

Q: Single phase half wave controlled rectifier with R load and a = TT/2. Find: FF, RF, and PIV Answers…

A: a single phase half wave controlled rectifier with R load is given firing angle α= 90° to find…

Q: Given the range . Find the per scale value for each range based on the encircled basis only. (Follow…

A: The given image of the analog multi-meter screen is shown below. We need to calculate the values…

Q: The longitudinal dynamics of the aircraft is defined by: x = Ax+Bu, A= B=BT = [0 B=BE = [0 0 0 0 0 0…

A: In the given question, we need to check the stability of the system. The given state matrix is…

Q: Oa. PORTA O b. PORTB O c. PORTC and PORTD all of above O d.

Q: 5) The work done in moving a 10 µC charge from point A(1,30°, 120°) to point B(4, 90°. 60°) = --- -…

Q: G(s) = K s(s+ 2)² and H(s) = 1 A.2. Find two values of gain that will yield closed-loop, overdamped,…

A: The given open-loop transfer function is Gs=Kss+22. The feedback gain is Hs=1. Since nothing is…

Q: d³c d²c +3- dt3 dt2 +7dc dt + 5c = dr +4 + 3r. dt² dt

Q: A RHCP plane with an electric field strength of 10V/m with a frequency of f-3GHz propagating in the…

A: To explain and write the electric and magnetic field vectors of the electromagnetic wave described,…

Q: 3) Non-Inverting Op-Amp Raj 2 k www 10 k 10 km 10 kn OUT VOUT Op-Amp is Ideal A) Calculate the…

Q: Op-Amp is Ideal A) Calculate the voltage gain, A, = Vout/Vin B) Calculate the input resistance, Ri…

A: We need to calculate the inputs resistance, voltage gain and output current.

Q: 6. In a series circuit containing pure resistance and a pure inductance, the current and the voltage…

A: It is given that: it=5sin314t+2π3=5∠2π3° Avt=15sin314t+5π6=15∠5π6° V

Q: 4,6 R₁ AM Rr m 2,374 B

A: Given Data: A DC resistive circuit with, Input Battery voltages, V1=4.6 V V2=2.3 V To Find: The…

Q: A three phase star-connected load is drawing power at a voltage of 0.9 pu and 0.8 power factor…

Q: PART B: Design Problem using Karnaugh Mapping Technique A jet aircraft employs a system for…

Q: 4. In ac circuit, resistance 5 ohm is connected with capacitor having capacitive reactance 12 ohm.…

A: It is given that: R=5 ohmXC=12 ohmV=260 V

Q: v(t)=83cos(10t) V, R = 40 Ohm, C = 0,007 F, L = 5 H . a) Calculate impedances for the…

A: The above question is based on single-phase AC circuit analysis. Since multiple subparts have been…

Q: 23(A): A uniform volume charge density of 0.2μC/m³is presented throughout a spherical shell from r =…

A: The volume charge density, ρV=0.2 μC/m3 The radius, r=3 cm to r=5 cm

Q: Q2 Figure Q2 shows the Zener diode acting as a regulator and having variable input, Vi. Given the…

A: Given: A zener diode voltage regulator, with, VZ=20 V, IZM= 60 mA, R=100?,RL=3 k?, To find: i)…

Q: For the pass transistor chain shown in the figure below, what is the voltage at the output? VDD VDD…

A: Here pairs of MOSFET circuit given we need to find the output voltage. Vth=Vtn Circuit:-

Q: The average value of a sine wave is as ......... times the peak value 0.637 0.5 1.21 0.707

A: Waveform of sine wave is given by,

Q: PROBLEM IO.27 For the circuit shown in Figure 10.128, sketch and label UR versus time. Assume that v…

A: Solution: Given Data: V(1)=K(1) ; t=0 determine: =>here Find and complete equation VR = (K2 -…

Q: A JK Flip Flop is given below. Study the inputs and derive the Q output. वव PR C KCLR 10 INPUTS PR…

A: A flip flop change it's output at active edge of clock. Preset is used to set the output of flip…

Q: 174. The EMF induced in the armature of a shunt generator is 500 V. The armature resistance is 0.2…

A: A shunt generator having, Induced emf in the armature, E=500 V Armature resistance, Ra=0.2Ω Armature…

Q: Suppose you are designing a solar power system for a small house. The system includes a set of solar…

Q: 60 V- A 560 ΩΣ * 1.0 ΚΩ 1.0 ΚΩ Μ 910 Ω Μ 560 Ω Β 56 Ω `1.0 ΚΩ 560 Ω 560 Ω

Q: 17. If a frequency modulator produces 4 kHz frequency deviation for a 10-Vp modulating signal,…

Q: Determine the following VB Vc VE hie R'in Vo Ais R'a C₁ 카 1.0 µF R₁ * 8.2 ΚΩ ww R₂ • 22 ΚΩ + +18 V…

A: I have written this solution as handwritten solution. Hope you find the perfect solution.

Q: A 220 V separately excited dc motor takes 20 A and the armature resistance is 1.0 0. If the armature…

A: Terminal voltage = 220V, Armature current = 20A, Armature resistance = 1ohms and the armature…

Q: Problem 4: In the circuit shown below, v(t)=15 cos(800r) V: v. (1) ( 202 www 6 mH 0000 elle 2:5 Use…

Q: Consider the sequence h[n] of Fourier transform H(w) = w² for all wE [-T, T7] as illustrated in the…

A: To determine if it is possible to find a constant c such that the LTI system with impulse response…

Q: Consider the transfer functions shown below. Analyze the transient response for a step input and…

A: For the given second-order system the response of the system needs to be obtained and based on the…

Q: Assume that the initial energy stored in the inductors f both figures is zero. Suppose that L₁ = 8…

Q: Design a sequential logic circuit based on the following state graph:

A: For the given state diagram the equivalent sequential circuit needs to be designed by using the…

Q: The system matrices in the control canonical form are in the form: ('xxx' indicates a non-zero…

A: here we have to identify the standard controllable canonical form representation.

Q: find yo Vo When V₁ = IV, 12=21

A: It is given that: V1=1 V V2=2 V Assuming op-amp to be ideal.

Q: Does there exists a nonzero input that is canceled by the following system? x[n]. If so, explain in…

A: To determine if there exists a nonzero input that is canceled by the given system, we need to…

Q: 15) For the operational amplifier shown, if Vi is 888 V, find Vo. 20 K ww 200 K www A. 187.78 mV B.…

Q: Find the voltages at the three nonreference nodes in the circuit Ans should be: V1= 80V V2= -64V V3=…

A: The circuit diagram,

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

ANSWER THE FF. PROBLEM, ANSWERS MUST BE IN 2 DECIMAL PLACES AND DRAW AN ILLUSTRATION TO UNDERSTAND IT MORE.

2. The full-load copper losses of a 150-KVA transformer are three times its core loss and its maximum
efficiency is 97.8 %. Calculate the half load efficiency of this transformer at 0.707 power factor at all
cases.
3. A 120 KVA transformer has a maximum efficiency of 98 % and this condition occurs at 10% under load,
both at 0.9 pf. Calculate the efficiency at half-load, 0.8 power factor.
4.
A certain transformer has a maximum efficiency of 98 % and this condition occurs at 10% under load,
both at unity pf. If its efficiency at quarter full-load, 0.8 power factor is 95.3%, calculate the KVA rating
of the transformer.

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: given data :

VIEW

Step 2: calculation :

VIEW

Solution

VIEW

Step by step

Solved in 3 steps

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

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
An ideal transformer has no real or reactive power loss. (a) True (b) False
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 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.
In developing per-unit circuits of systems such as the one shown in Figure 3.10. when moving across a transformer, the voltage base is changed in proportion to the transformer voltage ratings. (a) True (b) False
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.
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.
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
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 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.
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. -