(b) A 15-kVA, 2300/230-V transformer is to be tested to determine its excitation branch components, its series impedances, and its voltage regulation. The following test data have been taken from the primary side of the transformer: Open circuit test Short circuit test Vsc = 47 V Ioc =0.21 A Isc = 6 A Poc = 50 W Psc = 160 W PTL o (i) Find the equivalent circuit of this transformer referred to the high-voltage side. (ii) Find the equivalent circuit of this transformer referred to the low-voltage side. (iii) Calculate the full-load voltage regulation at 0.8 lagging power factor, 1.0 power factor, and at 0.8 leading power factor. Also, draw transformer phasor diagrams for these three cases. (iv) What is the efficiency of the transformer at full load with a power factor of 0.8

(b) A 15-kVA, 2300/230-V transformer is to be tested to determine its excitation branch components, its series impedances, and its voltage regulation. The following test data have been taken from the primary side of the transformer: Open circuit test Short circuit test Vsc = 47 V Ioc =0.21 A Isc = 6 A Poc = 50 W Psc = 160 W PTL o (i) Find the equivalent circuit of this transformer referred to the high-voltage side. (ii) Find the equivalent circuit of this transformer referred to the low-voltage side. (iii) Calculate the full-load voltage regulation at 0.8 lagging power factor, 1.0 power factor, and at 0.8 leading power factor. Also, draw transformer phasor diagrams for these three cases. (iv) What is the efficiency of the transformer at full load with a power factor of 0.8

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 3.55P: A single-phase l0-kVA,2300/230-volt,60-Hz two-winding distribution transformer is connected as an...

See similar textbooks

Related questions

Q: XSC1 ХВР1 Tektr IN OUT R4 12kQ 12V U1 C1 C2 5nF 5nF 741 V1 VEE R3 1Vpk 500HZ 0° 12kQ -12V RA 31KQ RB...

Q: G4 G, 2 G2 3 1 4 1 C R 1 5. G3 1.

Q: The x-y plane at z = 0 is a charge-free boundary separating two dielectric media with permittivities...

A: The electric field in the first medium is given, the permittivities of the medium are ε1 and ε2, the...

Q: In a standard parallel RC circuit, the supply voltage is v(t) = 6sin(@t), %3D f= 50 Hz, R = 22 and C...

A: Given data, Parallel RC circuit vt=6sinωtf=50 HzR=2 ΩC=5 mF

Q: An ideal transformer is connected to a 110V(rms), 60HZ source. Line impedance on the primary is 4+5i...

Q: A base biased transistor circuit with the following element values is given VBB = 10V, VCC = 10V, R...

A: Given RB1= 446.5 kohm RB2= 493.5 kohm Rc= 829 ohm Find IBmax and Ibmin

Q: The transistor lead that serves as a source charge is known as?

A: Note: As pert the policy we can answer only one question please re-upload the remaining question as ...

Q: The switch that is moved by a long metal or plastic actuator that extends out of the switch package ...

A: A statement is given and it is asked that which switch is moved by a long metal or plastic actuator ...

Q: Find the DFT of x(n). Show all your work. x(n)= [2 3 4 4]

Q: 2. Obtain Norton equivalent of the circuit with respect to terminal a and b and find i. 12 V +) 2 A ...

Q: 2. Build CMOS circuit using Bubble Pushing & Structure method: a) F = (a + b)(c + d) b) F = ab + cd ...

A: The boolean function is given below,a. F=a+b·c+d¯b. F=ab+cd¯

Q: A system contains three fundamental interdependent components. Examine each of these components in r...

A: Assuming an electric resistive system: The three fundamental components are: Resistive Current Vol...

Q: 7.7 Consider the following first-order systems System I: i+x =r System II: 2x +x =r System III: 5x +...

A: Three system equations are given. Every system is subject to a unit step input. It is mentioned to a...

Q: 4. A Parallel RLC having a resistance of 100 ohms, an inductance of 0.53 henry, with a capacitance o...

A: Resistors are the electrical components which dissipate active power in the form of heat. Capacitors...

Q: QUESTION 28 A three-phase balanced delta connected power system has a line current of 50 amps. What ...

Q: The figure shows a conductor with four strands. Compute the GMR in terms of the radius r. Round-off ...

Q: RI R3 A 72V = RL Calculate vTH and RtH, IN and RN ! Note : TH - thevenin N= Norton.

A: The solution is given below

Q: H.W:- In the circuit shown in the figure, using superposition theorem, find the following:- R1 1- Th...

Q: iii. The impedance triangle representing: (a) RMS value diagram. (b) Average value diagram. (c) Inst...

Q: What is the current when resistance is reduced by 50%

Q: 4.For the following pair of voltage and current, indicate whether the element involved is a capacito...

Q: Calculate the capacitive reactance in Q-km of a bundled 60 Hz three-phase line having three ACSR Rai...

A: Conductor- A conductor is a material which contains a significant population of free electrons that ...

Q: What is the input capacitance of a 4-input NOR gate with drive 3 (three times larger than standard s...

A: Given 4 - input NOR Gate with drive 3 which means Drive = 3 times the standard size. And 4 - input...

Q: A 40µF, 600V paper capacitor is available but we need one having rating of about 300µF. It is propos...

Q: Solve the transfer function of the following systems. Show your intermediary steps for every block r...

Q: 1- What causes a three-phase motor to run backwards? 2- How we can reverse the direction of the indu...

A: Whenever the phase sequence of the motor is reversed it makes the motor to move backwards

Q: For the circuit shown, a) Determine the load impedance that will result in maximum average power bei...

A: Maximum power theorem: This states that in the circuit load resistance is equal to the source resist...

Q: 6 Ohm 1 mH 18 VI50 H0 Deg 3 A/50 Ha0 Deg 1 uF Ohm Fig.2

A: The given circuit diagram is shown below:

Q: R1 L1 R2 C1 5000 795.77mH 2000 5.53µF V1 R3 300Vrms 60HZ 0° L2 530.52mH

A: Maximum power theorem: This states that in the circuit load resistance is equal to the source resist...

Q: QUESTION 28 A three-phase balanced delta connected power system has a line current of 50 amps. What ...

A: Given a three phase balance delta connected power system having, Line current, IL=50 A

Q: The carrier signal of amplitude 10V is frequency

Q: R=330 Q R=1 kQ R=3.3k Q Supply Voltage (V) Calculated I (mA) Calculated I (mA) Calculated I (mA) 1 2...

Q: 8) Before the digtisation process of a recorded ECG signal, high-trequency signal components above 2...

Q: What is the value of Rx in kQ to be connected in parallel to a 75 kO to reduce the value of total re...

Q: Find the current through 3.00 N resistor. Express your answer with the appropriate units. HẢ ? I300 ...

Q: Sketch the RS-232 waveform that results from transmitting the binary value 10100011 over a 14,400-8-...

A: RS-232 Logic Waveform The above waveform applies to the Transmission and Receiving lines on the RS-2...

Q: Q10/ A 3-phase, 6-pole induction motor is connected to a 60 Hz supply. The voltage induced in the ro...

Q: 2. Find I in the circuit of using the superposition principle. 8 V (+ 2 A 6 V

A: According to superposition principle, output across the load is algebric sum of individual outputs w...

Q: 5. Calculate the electric flux of the closed surfaces c and d given the following charges: q1= +3C, ...

A: By gauss law electric flux leaving the surface is same as the charge enclosed.

Q: Question 3 Refer to the circuit in Figure Q3: C=265.25 uF R = 52 L=39.79mH v = 85 sin (377t+10) V Fi...

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

Q: A 415V TPN busbar rising main chipped to a surface is to provide a 240V supply to each of 8 individu...

A: Answer - Following is the circuit arrangement showing how each flat must be connected to the rising ...

Q: а 10 N + 15N b.

Q: Q8: Choose the correct answe i. The voltage and current in AC and DC circuits are: (a) Vector quanti...

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

Q: II. Design the following. NA. 1) Design a clipper circuit of clipping the positive cycle of an AC si...

Q: If an experiment uses a pressure transducer that collects samples at 1000HZ, what is the highest det...

Q: 2 A 6Ω 5Ω www 12Ω V2 value of vo is 29.3 8 mV. me vo1, Vo2. and vo3 are due to the 2-A, 11-V, and 19...

Q: With neat diagram explain the construction and working of CRO.

Q: following components: DC supply, 1k resistor and a) Ideal diode b) silicon diode Vi (V) Vo (V) 10- 1...

Q: Determine the per unit impedance of a transmission line having an impedance of 30 + j110 Ω on 100 MV...

Q: A differentiator has an input of sin wt calculate the output voltage given the following values; R =...

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

(b) A 15-kVA, 2300/230-V transformer is to be tested to determine its excitation
branch components, its series impedances, and its voltage regulation. The following
test data have been taken from the primary side of the transformer:
Open circuit test
Short circuit test
Vsc = 47 V
SC
Ioc = 0.21 A
Isc = 6 A
Poc = 50 W
Psc = 160 W
PLo (i) Find the equivalent circuit of this transformer referred to the high-voltage side.
(ii) Find the equivalent circuit of this transformer referred to the low-voltage side.
(iii) Calculate the full-load voltage regulation at 0.8 lagging power factor, 1.0 power
factor, and at 0.8 leading power factor. Also, draw transformer phasor diagrams for
these three cases.
(iv) What is the efficiency of the transformer at full load with a power factor of 0.8
lagging?
idool transformer having

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

Step 3: Solution of subpart (i).

VIEW

Step 4

VIEW

Step 5

VIEW

Step 6: Solution of subpart (ii).

VIEW

Step 7

VIEW

Step 8: Solution of subpart (iii)

VIEW

Step 9

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 9 steps with 4 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

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
The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d. air core 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.
Two transformers A and B have the following data Transformer A: 6600/440 V, (250 KVA ) requires ( 6%) of rated voltage to circulate (90%) of full load current at power factor (0.25) when the low voltage winding is short circuited and the no load loss is equal to (2500 W). Transformer B: 6600/420 V, (600 KVA) requires (9%) of rated voltage to circulate (80%) of full load current at power factor (0.16) when low voltage winding is short circuited and no load loss is equal to (4500 W). Calculate the followings: If both transformers are connected in parallel to supply a load (1.2 + j 2.3) ohm, find the output power of each transformer.
Two transformers A and B have the following data Transformer A: 6600/440 V, (250 KVA ) requires ( 6%) of rated voltage to circulate (90%) of full load current at power factor (0.25) when the low voltage winding is short circuited and the no load loss is equal to (2500 W). Transformer B: 6600/420 V, (600 KVA) requires (9%) of rated voltage to circulate (80%) of full load current at power factor (0.16) when low voltage winding is short circuited and no load loss is equal to (4500 W). Calculate the followings: The terminal voltage when transformer A is supplying half load at power factor (0.6) lagging and transformer B is supplying (85%) of full load at power factor (0.85) leading.
In the single-phase, three- winding, transformer, the primary current is equal to lo at the condition of ints there is no load on tertiary windings the current in secondary windings equal to zero the resistances (R1, R2, and R3) in transformer windings are equal the inductances (L1, L2, and L3) in transformer windings are equal.
3. Why the copper loss in the primary can be neglected, in the open circuit test? 4. Why the terms Rm and Xm significant when the transformer is loaded?
Q Two transformers A and B have the following data Transformer A: 6600/440 V, (250 KVA ) requires ( 6%) of rated voltage to circulate (90%) of full load current at power factor (0.25) when the low voltage winding is short circuited and the no load loss is equal to (2500 W). Transformer B: 6600/420 V, (600 KVA) requires (9%) of rated voltage to circulate (80%) of full load current at power factor (0.16) when low voltage winding is short circuited and no load loss is equal to (4500 W). Calculate the followings: The maximum efficiency of each transformer at power factor (0.75) lagging.
The circuit for a 20-kVA, 220/3960 V, 50-Hz transformer is shown in Figure (1). The open- circuit test and the short-circuit test was performed on this transformer and the following data were taken: Open-Circuit test: Voc=240 V, Ioc=2.8 A, Poc=260 W Short-Circuit test: Vsc = 350 V, Isc=7.6 A, Psc = 420 W 1) Find the values of Rc, XM, Rp and Xs for this transformer. 2) Find the equivalent circuit of this transformer referred to the high-voltage side and draw the circuit. j 0.163 Q jXM 0.02 02 jXs
A transformer has primary and secondary turns of 1250 and 125 respectively. It has core cross-sectionof 36 cm2 and its rms flux density is to be limited to 1.4 T (to prevent core saturation). Whatmaximum 50 Hz voltage can be applied on the primary side and the corresponding open-circuitsecondary voltage?The core has a mean length of 150 cm and its relative permeability can be assumed to be 8000. Whatwould be the rms exciting current when the transformer’s primary winding is excited at a voltage ascalculated above? Also calculate the magnetizing susceptance as seen from primary and secondarysides.If the transformer were to be excited at 60 Hz, 1. What should be the maximum primary voltage for thecore flux density limit not to be exceeded? 2. What would be the magnetizing susceptance as seen oneach side in this case?
Determine the regulation of a transformer in which thepercentage resistance drop is 1% and the percentagereactance drop is 5% when the power factor 0.8 leading.
Determine the peak-to-peak ripple and dc output voltages. The transformer has a 36 Vrms secondary voltage rating, and the line voltage has a frequency of 60 Hz. Use germanium diodes.