Answered: A12 Efficiency of DC machine is high as…

Engineering

Electrical Engineering

A12 Efficiency of DC machine is high as compared to the transformer. (TRUE/FALSE)

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: A Transformer with 10:1 ratio and rated at 50-kVA, 2400/240-V, 50-Hz is used to step down the…

Q: 7- The Full load. Cu loss and iron loss of a transformer are 920 W and 430 W respectively. (i)…

A: In this question we need to find loading of the transformer at which maximum efficiency occurs and…

Q: During short-circuit test of a transformer, the core loss of a transformer is negligible. Select…

A: Need to find true false

Q: In open circuit test of a single phase transformer, the voltmeter gives us rated voltage. Select…

A: Need to find the true false

Q: A transformer has 500 primary turns and 3000 secondary turns. If the primary voltage is 240V,…

Q: As a production engineer in Super Power Electrical Technology Sdn. Bhd., you have been given a…

Q: A transformer is rated 20k V/200KV, 350MVA and has an internal impedance of j6.42 as seen from the…

A: Data given for transformer are: 20kV/200kV, 350MVA and Z=j6.4Ω The impedance referred to secondary…

Q: Q2) A 140-kVA, 7500/277-V distribution transformer has the following resistances and reactances: R,…

A: As per the guidelines of Bartley we supposed to answer first three subpart only.

Q: a) With the aid of a well-labeled diagram, describe a step by step approach of conducting a…

A: A continuity test provides the information about a break in either of the coil wires. To perform…

Q: Draw and explain the scheme illustrating the principle of a transformer voltage U2 regulation…

A: OLTC (On-load tap changer transformer): The tap changer is a device that is tied to the power…

Q: 0 A method for determining the equivalent circuit of a transformer consists of two tests: the…

A: Open circuit test: Since the no-load current is limited to 5% of full load value, the primary copper…

Q: Explain 3-phase auto transformer with necessary diagram. Also write the applications.

A: Three phase Auto transformer: Circuit diagram:

Q: A 500KVA transformer has iron loss of 500W and copper losses at full load of 2000W. Then at what KVA…

Q: SUBJECT: Elements of Electrical Machines Design INSTRUCTIONS: - Please write clearly and…

A: Transformer: It is a static device that is used for electrical to electrical power transfer without…

Q: The Full load. Cu loss and iron loss of a transformer are 920 W and 430 W respectively. (i)…

Q: 7- The Full load. Cu loss and iron loss of a transformer are 920 W and 430 W respectively. (i)…

A: In this question we will find loading of transformer for maximum efficiency...

Q: Power losses in a transmission line can be decreased by stepping up the voltage using transformer.…

A: We need to tell about whether given statement is true or false.

Q: The burden of current transformer is specified as the ratio of primary to secondary turns of the…

Q: The rating of current transformer is given as 200/5A 5P10 20VA. Assume that the secondary resistance…

A: Given CT secondary resistance =Rc t =0.12 Ω from CT data 200/5A 5P10 20VA Sn =20 VA I=5 A Fn=10

Q: A 500 kVA transformer has an efficiency of 95% at full load and also at 60% of full load; both at…

A: (a)Separation of losses: Where Pi is iron loss and PC is full load cu loss.…

Q: Please provide me background of maintenance about transformer, motors, industrial plant.

Q: please write introduction of Study of transformers

A: we need to explain introduction of Study of transformers

Q: 3. WRITE IN DETAIL ABOUT TRANSFOERMER, WHAT IS STEP DOWN TRANSFORMER USED FOR? with the help of…

A: A transformer is a static device, which converts electrical power from one circuit to the other…

Q: A short-circuit test was performed on a 10kVA, 2000/400 V single phase transformer. The instruments…

Q: 2. Sketch a simplified equivalent circuit of a transformer

A: Electrical machines can be either generator, transformer or motors. They can be either Ac machines…

Q: Explain the importance of transformer and basic insulation level in the distribution system. Justify…

A: The Basic Insulation Level (BIL) of a transformer is a method of expressing the voltage surge the…

Q: The transformer is the static device which works on the principle electromagnetic induction. O True…

A: Transformer is device which used to step up or step down the input voltage.

Q: DC 200 V was applied to the primary of a transformer with a conversion ratio of 1/5. Obtained from…

Q: For a 150 kVA, 2400/240 V transformer, the equivalent circuit parameters are given as R1 = 0.2 Ohm,…

Q: A 2.4-kVA, 2400/240-V, 50-Hz, step-down transformer has the following parameters: R, = 1.5 a, X, =…

Q: Discuss the types of transformers with their applications. Explain with a neat diagram an isolation…

A: A transformer is a stationary machine that transfers the power from one circuit to another which is…

Q: A 15 kVA, 2300/230 volt transformer is under test. With the low side supplied with rated voltage and…

Q: Electrical transformer can transformer DC voltages and current Group of answer choices True False

A: In this question , choose the correct options Check the given Statment is true or false. Electrical…

Q: Q2. Consider a 40MVA, 132/11kV transformer with a reactance of 15% on its rating, (a) shown in…

A: Given: Consider a 40MVA, 132/11 kV transformer with a reactance of 15% on its rating, shown in the…

Q: 4.1 Assume that an ideal transformer used to step down 13.8–2.4kV and that it is fully loaded when…

A: Given:Transormer is ideal,Hence, the i/p KVA = o/p KVAVoltage rating 13.8 kV/ 2.4 kVAlso, o/p KVA =…

Q: Q1. what are the advantages of transferring parameters from 1 side of transformer to other side?…

A: Advantages of transferring parameters from 1 side of transformer to other side- 1.Easy to calculate…

Q: A transformer of 100MVA, 60Hz, 138/69 kV, works as step down, has the following parameters: r1 =…

Q: SUBJECT: Elements of Electrical Machines Design INSTRUCTIONS: - Please write clearly and…

A: All Day Efficiency: All Day efficiency Consider as the ratio of output power to input in KWH in All…

Q: A 25-cycle transformer has 2,250 primary turns and 150 secondary turns. If the maximum value of the…

A: A 25 cycle transformer means frequency =25 Hz N1 = 2250 N2 = 150 Flux =0.0264 weber

Q: The purpose of the short circuit test of a transformer is to determine iron losses of its

A: Short circuit test is conducted on low voltage side.

Q: TRUE or FALSE: If a transformer operates at maximum efficiency, then the power factor is at unity

A: condition for maximum efficiency is copper losses are made equal to iron losses . and maximum…

Q: (B)- Draw the graph of efficiency against load current when the transformer is loaded

A: Efficiency of transformer is given by, η=outputoutput+losses Losses of the transformer is the…

Q: Transformers are widely used for industrial and residential applications. In long distance…

A: The transformer has a primary and a secondary side. It converts electrical power to electrical power…

Q: Assertion (A): The regulation of the good transformer should be less than 3 percent. Reason (R):…

A: The percentage difference in the output voltage from no-load to full-load is the transformer's…

Q: the insulation of the equipment tested is healthy?Justify

A: What is Insulation?In simple terms Insulation is nothing but a material which opposes the flow of…

Q: Primary of Current Transformer is having less number of turns. Select one: True False

A: In this question , we will define turns in primary of current transformer..

Q: Investigate the different types of power transformers that exist today, mentioning their principle…

A: According to the question, we need to discuss the different types of power transformers that exist…

Q: What is the level of the peak voltage at the secondary 1 (Vsecondary 1) and secondary 2 (Vsecondary…

Q: Draw a complete circuit diagram for a transformer with definition.

A: According to the question we have to draw a complete circuit diagram for a transformer with a…

Question

A12
Efficiency of DC machine is high as compared to the transformer.
(TRUE/FALSE)

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 by step

Solved in 2 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 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
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
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.
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.
Reconsider Problem 3.64 with the change that now Tb includes both a transformer of the same turns ratio as Ta and a regulating transformer with a 4 phase shift. On the base of Ta, the impedance of the two comp onents of Tb is jO.1 per unit. Determine the complex power in per unit transmitted to the load through each transformer. Comment on how the transformers share the real and reactive pors.
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.
The per-unit equivalent circuit of two transformers Ta and Tb connected in parallel, with the same nominal voltage ratio and the same reactan of 0.1 per unit on the same base, is shown in Figure 3.43. Transformer Tb has a voltage-magnitude step-up toward the load of 1.05 times that of Ta (that is, the tap on the secondary winding of Tb is set to 1.05). The load is represented by 0.8+j0.6 per unit at a voltage V2=1.0/0 per unit. Determine the complex power in per unit transmitted to the load through each transformer, comment on how the transformers share the real and reactive powers.
The direct electrical connection of the windings allows transient over voltages to pass through the auto transfonner more easily, and that is an important disadvantage of the autotransformer. (a) True (b) False
PowerWorid Simulator case Problem 3_60 duplicates Example 3.13 except that a resistance term of 0.06 per unit has been added to the transformer and 0.05 per unit to the transmission line. Since the system is no longer lossless, a field showing the real power losses has also been added to the oneline. With the LTC tap fixed at 1.05, plot the real power losses as the phase shift angle is varied from 10 to +10 degrees. What value of phase shift minimizes the system losses?
The ideal transformer windings are eliminated from the per-unit equivalent circuit of a transformer. (a) True (b) False
Consider the single-line diagram of the power system shown in Figure 3.38. Equipment ratings are Generator 1: 1000MVA,18kV,X=0.2perunit Generator 2: 1000MVA,18kV,X=0.2p.u. Synchronous motor 3: 1500MVA,20kV,X=0.2p.u. Three-phase -Y transformers T1,T2,T3,T4,: 1000MVA,500kV,Y/20kV,X=0.1p.u. Three-phase YY transformer T5: 1500MVA,500kV,Y/20kVY,X=0.1p.u. Neglecting resistance, transformer phase shift, and magnetizing reactance, draw the equivalent reactance diagram. Use a base of 100 MA and 500 kV for the 50-ohm line. Determine the per-unit reactances.
Consider the single-Line diagram of a power system shown in Figure 3.42 with equipment ratings given: Generator G1: 50MVA,13.2kV,x=0.15p.u. Generator G2: 20MVA,13.8kV,x=0.15p.u. Three-phase -Y transformer T1: 80MVA,13.2/165YkV,X=0.1p.u. Three-phase Y- transformer T2: 40MVA,165Y/13.8kV,X=0.1p.u. Load: 40MVA,0.8PFlagging,operatingat150kV Choose a base of 100 MVA for the system and 132-kV base in the transmission-line circuit. Let the load be modeled as a parallel combination of resistance and inductance. Neglect transformer phase shifts. Draw a per-phase equivalent circuit of the system showing all impedances in per unit.