A single phase transformer takes 10 A on no load at p.f. of 0.2 lagging. The turns ratio is 4: 1 (step down). If the load on the secondary is 200 A at a p.f. of 0.85 lagging. Find the primary current and power factor. Neglect the voltage-drop in the winding. (Nagpur University November 1999)

A single phase transformer takes 10 A on no load at p.f. of 0.2 lagging. The turns ratio is 4: 1 (step down). If the load on the secondary is 200 A at a p.f. of 0.85 lagging. Find the primary current and power factor. Neglect the voltage-drop in the winding. (Nagpur University November 1999)

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 3.15P: Rework Problem 3.14 if the transformer is delivering rated load at rated secondary voltage and at...

See similar textbooks

Related questions

Q: Suppose we construct a voltage divider circuit as shown in Figure 1.1 where the voltage source V₁ is…

Q: What is the origin of the mathematical equation in the following script? z=sqrt(pow(x, 3)+pow(y,2));

A: This script can be written as Z=x3+y2 For origin of this equation mean when x=0y=0z=0 so origin…

Q: Sketch the equivalent block diagram for the control system shown and identify the following elements…

A: Given figure is an example of closed loop system where feedback system is used. For shown figure, we…

Q: Given A=4a + 2a and 6a-4a, find the smaller angle between them using the cross product. Show the…

A: We need to find out angle between the given vector

Q: A three-phase induction motor is supplied from a 50 Hz supply and runs at 1200 rev/min when the slip…

Q: 35. In Fig. 28, the 10 resistor dissipates 360 W. What is the voltage drop across the 5 resistor?…

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

Q: Len Aluminum has a bulk resistivity p of 2.7 µ-cm. Find the length, Len, (in meters) of the above…

Q: A 3-phase, 50 Hz, oil cooled core type transformer has the following dimensions: distance between…

Q: In the figure shown, the voltage and current waveforms of a motor are plotted. What is the phase…

A: Given, The time period of waveform T=0.025 sec The time shift between voltage and current waveform…

Q: 10 Using superposition, determine the voltage labeled Vx in the circuit represented in Fig.4. 3Ω 1Ω…

A: In this question, We need to calculate the value of voltage VX using the super position theorem.…

Q: What is the goal of circuit theory?

A: Please comment if you need any clarification. If you find my answer useful please put thumbs up.…

Q: A DC circuit with a 12 V source has three resistors wired in series, with resistances of 5 , 17 ,…

Q: 0-08905 14.67V Om Cable resistance 12.523 1-74A 7.15V 2072 (1)6.67A

Q: A 10 kW shunt generator having an armature circuit resistance of 0.75 ohm and a field resistance of…

Q: Q.3) A synchronous motor operating at rated voltage draws 1.0 pu current at 1.0 power factor. The…

A: Given- Synchronous motor, 1.0 pu current at 1.0 power factor, synchronous reactance 1.0 armature…

Q: The cathode of a zener diode in a voltage regulator is normally O at +0.7 V O at +0.3 V O grounded…

Q: :- Consider the circuit shown in Figure 1. ß-120 a) Find Rc such that VCEQ=2.8 V b) Determine the…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: 10 V A Si Si B R1 1 kohms D Si R2 1 kohms 112 13 Ge

Q: A 200V, 50 Hz supply is connected across a coil of negligible resistance and inductance 0.15 H…

Q: A silicon pn junction at T= 300 K has the doping profile shown in figure 1 below. 1.1 (N₁-N₂) (cm3)…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: This type of Circuits is called --- ‒‒‒‒‒ Vin(1) D₁ + V

Q: The Transfer function T(S)

Q: A 4-pole induction motor and a 6-pole induction motor are connected in cumulative cascade. The…

A: We have been given two motors that are connected in cumulative cascade. one motor is 4 pole…

Q: If an AC signal has a peak voltage of 55V, what is the average value voltage? a. 110 V b. 17.5070 V…

Q: How many digits is the Octal System capable of having?

A: Numbers can be represented using various number system. Four basic number systems are - Decimal…

Q: A battery can deliver 15 joules of energy to move 9.4 coulombs of charge. What is the potential…

A: Given: Energy delivered by battery, E=15 J. Charge, Q=9.4 C.

Q: A parallel plate capacitor has an electrode area of 100 mm², with a spacing of 0.1mm between the…

A: Given- Area- A=100 mm2, Spacing d=0.1 mm, Permittivity- εo=8.85×10-12 F/m, Charge V=100 V, To Find-…

Q: 1. Calculate the synchronous speed of 60-Hz induction motors having four poles 2. Calculate the…

A: (1) Given: Frequency, f = 60 Hz. Number of poles, P = 4

Q: 2 A parallel plate capacitor has an electrode area of 100 mm², with a spacing of 0.1mm between the…

A: In this question, We need to choose the correct option We know energy stored in the capacitance E=…

Q: The armature of a d.c. machine has a resistance of 0.25 ohm and is connected to a 300V supply.…

A: As per the question, it is given that Resistance = 0.25 ohm Voltage = 300 V We have to calculate the…

Q: Convolution the following: A xit) t Jh(t) et

Q: A 3 phase, 4 pole, 11 kV, 10,000 kVA alternator has neutral earthed through a resistance of 9 ohms.…

Q: A capacitor having a Q-factor of 300 is connected in parallel with a coil having a Q-factor of 60.…

Q: What is the equation of this voltage waveform? V(t) = ?

A: The given voltage waveform can be converted into its equivalent voltage expression by observing the…

Q: Q3: Consider a QPSK communication system over an AWGN channel with SN() = No/2 W/Hz. Bit values 0…

A: in QPSK we use the symbol energy and in PSK we use the bit energy.

Q: residential bathroom is served by a 120 V branch circuit that has four loads connected in parallel:…

Q: Q.5) An inductive coil connected to a 200V, 50 Hz ac supply with 10 A current flowing it dissipates…

A: Given- V=200 V,f=50Hz,i=10 A,P=1000 watts. To Find- Which entity has least value in ohms.

Q: Question No.53 What is the value of a octal number (763); in hexadecimal number?

A: Given: Octal number = 7638

Q: given magnetic vector potential A= (6*x^3*y^2) ax+ (2*x*y^4) ay +(3*z) az find magnetic flux through…

Q: In a power supply diagram, which block indicates a smooth dc output? O rectifier regulator filter…

A: We need to select correct option for DC power supply

Q: 5. Connect the circuit as shown below. Measure the voltage across the capacitor and the current…

Q: Determine the value of +1 12 V + www 8592 O A. 0.44 Amps OB. 1.05 Amps OC. 0.15 Amps OD. 0.45 Amps O…

A: We need to find out the current for given circuit.

Q: Find the equivalent Excess -3 for the Decimal 814.

A: Given : 814 in decimal (814) 10 = ( ) xs3

Q: The type of circuits shown in figure is +10 V V ov -10 V O O O " A (A) R ww 1,0 ΚΩ Ideal diodes (C)…

A: Please comment if you need any clarification. If you find my answer useful please put thumbs up.…

Q: A pure element is connected across an AC signal. CH1 and CH2 measures the voltage and current…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: = Sample the input x (t) = et, given the sample period T signal a[n] when n = 6? 0.5. What is the…

A: Given, Sampled input, xt=e-t Sample period, T=0.5 To find: The value of the sampled signal x[n]

Q: 1202 ww equivalent resi 12902 1202 1292 www ice in Tollow 1202

Q: A set of samples is said to be pairwise linearly separable if there exist c(c − 1)/2 linear…

A: The ability to distinguish one class from all other classes using a single discriminator is the…

Q: A generator supplies power to a factory through cables of total resistance 20 ohms. The potential…

Q: Simplified expression/s for following Boolean function F(A, B, C, D) = Σ (0, 1, 2, 3, 6, 12, 13, 14,…

A: Given, Boolean function: FA,B,C,D=∑0,1,2,3,6,12,13,14,15

Concept explainers

Three-Phase Transformers

Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.

Question

A single phase transformer takes 10 A on no load at p.f. of 0.2 lagging. The
turns ratio is 4: 1 (step down). If the load on the secondary is 200 A at a p.f. of 0.85 lagging. Find
the primary current and power factor.
Neglect the voltage-drop in the winding.
(Nagpur University November 1999)

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

Step 2

Step 3

Step 4

Step by step

Solved in 4 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

Consider a source of voltage v(t)=102sin(2t)V, with an internal resistance of 1800. A transformer that can be considered as ideal is used to couple a 50 resistive load to the source. (a) Determine the transformer primary-to-secondary turns ratio required to ensure maxi mum power transfer by matching the load and source resistances. (b) Find the average power delivered to the load, assenting maximum power transfer.
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.
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 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 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.
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.
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.
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 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 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.