Explain the importance of transformer and basic insulation level in the distribution system. Justify your answer with real tıme applications. I
Q: A Transformer with 10:1 ratio and rated at 50-kVA, 2400/240-V, 50-Hz is used to step down the…
A:
Q: 120/480 V, 10 kVA two-winding transformer is to be used as an auto-transformer to supply a 480 V…
A:
Q: Using various types of transformers, give 1 impact to the end-users per type of transformer in terms…
A: NOTE:- As per our company policy, only FIRST 3 sub-parts of a Question can be answered at a time,…
Q: a) What is the minimum required transformer rating in kVA? b) By what percentage could the required…
A: It is given that:
Q: 2. A single-phase transformer has a rating of 100KVA, 7200V/600V, 60HZ. a. If it is reconnected as…
A:
Q: The efficiency of a 20 kVA 15.4 / 0.4 kV three-phase power transformer is 79.1% for a load with unit…
A: Given: For a 20 kVA, 15.4/0.4 kV, 3-phase star-delta transformer, Relative idle or no-load %I0=30,…
Q: Example 33.5. A 3-phase transformer, ratio 33/6.6-kV, A/Y, 2-MVA has a primary resistance of 8 per…
A:
Q: A12 Efficiency of DC machine is high as compared to the transformer. (TRUE/FALSE)
A: In all electrical machines transformer will have higher efficiency. Because there are no rotational…
Q: Given a transformer (single-phase, 10kVA, 2400/240V, 60Hz) Z1 = 5.2 + j12.5 ohms; Z2 = 0.06 + j0.12…
A: In this question we need to find a load voltage of transformer for given condition.
Q: A 20-ohm resistance is connected across the secondary winding of a single-phase power transformer…
A: Given:-Secondary voltage,V2=150vResistance is connected across secondary winding,∴R2=20ΩSupply…
Q: Please, answer reminding questions. 1.The data of a three-phase transformer gives specifications,…
A: a) According to the statement, circuit will look like Power delivered to the load…
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: Explain the Different connections of Three Phase Transformer including the working principle
A: Electrical machines can be either generator, motors or transformers. They can be either Ac machines…
Q: It is possible to connect A-Y transformer in parallel with another A-Y transformer? True O False
A: Is it possible to connect delta star transformer with another delta star transformer in parallel
Q: The single-phase transformer in the following figure has a load voltage Zl of 120 Vrms. If the load…
A:
Q: Use the knowledge on transformer to demonstrate ots application in power distribution i.e. from…
A: The Transformers are the devices that are capable of converting quantities from one value to the…
Q: A single-phase, 2,959 VA, 2200/220 transformer has the following open circuit and short circuit test…
A: 'Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: Explain 3-phase auto transformer with necessary diagram. Also write the applications.
A: Three phase Auto transformer: Circuit diagram:
Q: - When a 100-kVA single-phase transformer was tested in this way, the following data were obtained:…
A:
Q: 1-A single phase transformer with a ratio of 6600 400 V takes to no-load current of 0-7 A at 0-24…
A:
Q: Q2: a) Determine the efficiency of three-phase 400 kVA, 11kV/ 380 V transformer at over-loading…
A: The efficiency of a three-phase transformer is determined as shown below
Q: Question 2: Determine the below parameters for the given transformer while switch is ON and OFF.…
A: Given
Q: A) A single-phase transformer with a ratio of 440/110-V takes a no-load current of 5A at 0.2 power…
A: In the single phase transformer. What is primary current Ip = Io + IS ' Where Is' is secondary…
Q: (a) A 5 MVA 230/10.5-kV single-phase power transformer has a per-unit resistance of 1.5% and a…
A:
Q: 1- A single phase transformer with a ratio of 6600/400 V takes to no-load current of 0-7 A at 0-24…
A: Following data is given in the question.
Q: Three single phase transformers, each rated at 12kVA, 120/240V, 60Hz, are connected to form a…
A: Given data : Each rating of transformer =12 KVA Power factor =0.8 lagging
Q: Using various types of transformers, give 10 impacts to the end-users per type of transformer in…
A: As per Bartleby policy we can answer only first 3 parts. Please repost the question for other parts.…
Q: A step down transformer is also called Autotransformer O Distribution transformer O Star-star…
A:
Q: 8. The two winding transformer and the autotransformer of the circuit shown in Figur Determine the…
A: given transformer and autotransformer
Q: A 20-kVA 8000/480-V distribution transformer has the following resistances and reactances: R, = 32N…
A:
Q: In a 1-phase transformer of 20 KVA, 2000/200 volts, the iron and copper losses are 400 W and 500 W…
A:
Q: 1. A 40-MVA, 20/400 kV, single-phase transformer has the following series impedances: ZLV = 0.9 +…
A: Introduction: An equivalent Transformer Circuit is an explanation of the transformer's behavior by…
Q: A three phase transformer is used for ancillary services in a thermal power plant. It shows the…
A: transformation ratio = 20/6.6 = 3 for HV side of 18.5 kV, transformation ratio = 18.5/6.6 = 2.8 so,…
Q: 33. The efficiency of a 400 kVA, 1-phase transformer is 98.77 % when delivering full load at 0.8…
A: Here we discuss about the efficiency calculations of transformer. NOTE:- As in this 1 Q., 2…
Q: A single-phase transformer, with primary turns of 500, is delivering full-load of 80 kW at a lagging…
A: output power Po= 80 KW N1= 500 I2= 227 A ; cos ∅ =0.8 Po= 80 x 103 V2I2 cos ∅ = 80 x 103…
Q: (a) The efficiency of a 320 KVA, single phase transformer is 98.5 % when delivering full load at…
A:
Q: A 500 kVA, 3-Phase ,11 kV / 430 V distribution transformer with the equivalent percent resistance…
A: Given, Three Phase Transformer Voltage Rating= 11 KV/ 430V Output power= 500 KVA Equivalent…
Q: 1. A 11000/230V, 150KVA, 50 Hz single phase transformer has core loss of 1.4kW and full load copper…
A:
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: 2. (a) A 20 kVA, single phase-phase, 50 Hz, 2200/200 V transformer gave the following test results:…
A:
Q: 1. Why transformer specifications are expressed in KVA, not kW? Choose the correct answer and write…
A:
Q: Provide an analysis for the transformer mentioned below. The followings are the reading from the…
A: Note: We are authorized to answer three subparts at a time, since you have not mentioned which part…
Q: ABB company manufactures 44 kVA, 2200/220 V conventional transformer. Using this transformer, design…
A:
Q: . A 15kVA single-phase transformer, for 10000V/440V at no load, has resistances and leakage…
A: In this question, We need to determine the value of the secondary voltage at full load, 0.85 power…
Q: ratio
A:
Q: A single-phase transformer, rated at 25 kVA, 2200 / 60
A:
Q: 3. A single-phase 100-kVA, 7200-V/120-V, 60HZ distribution transformer is used as a step down…
A: transformation ratio, primary side impedance, secondary side impedance, primary and secondary side…
Q: A 270 kVA transformer has primary and secondary winding resistances of 0.6Ω, and 0.0016Ω…
A: According to question we have to find the efficiency of transformer at full load with the help of…
Step by step
Solved in 2 steps
- 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.Why is it important to reduce the moisture within a transformer to acceptable levels during transformer installation?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
- What should be the focus of transformer preventive maintenance efforts?The ideal transformer windings are eliminated from the per-unit equivalent circuit of a transformer. (a) True (b) FalseFor developing per-unit equivalent circuits of single-phase three-winding transformer, a common Sbase is selected for all three windings and voltage bases are selected in proportion to the rated voltage of the windings (a) True (b) False
- Consider the oneline diagram shown in Figure 3.40. The three-phase transformer bank is made up of three identical single-phase transformers, each specified by X1=0.24 (on the low-voltage side), negligible resistance and magnetizing current, and turns ratio =N2/N1=10. The transformer bank is delivering 100 MW at 0.8 p.f. lagging to a substation bus whose voltage is 230 kV. (a) Determine the primary current magnitude, primary voltage (line-to-line) magnitude, and the three-phase complex power supplied by the generator. Choose the line-to-neutral voltage at the bus, Va as the reference Account for the phase shift, and assume positive-sequence operation. (b) Find the phase shift between the primary and secondary voltages.7. The primary of a single-phase transformer takes 1 A at power factor of 0.4 when connected to a 240-V, 50-Hz supply and the secondary is on open circuit. The number of turns on the primary is twice that on the secondary. A load taking 50 A at a lagging power factor of 0.8 is now connected across the secondary. What is now the value of the primary current ? transformer.) (Neglect the voltage drops in theAns all the below questions... Which liquid is used for transformer cooling?What is cooling tube in transformer?Why does a transformer need cooling?What are the different types of transformer cooling?
- Make a conclusion regarding about the topic effect of frequency on transformer rating .8- In core design of power transformer the number of steps increased as the eross-sectional area increased to Increase: a) The leakage inductance. b) The cooling oil paths. c) The flux density. 9- The percentage impedance drop is an effective character of the transformer because: a) It increases the efficiency. b) It reduces leakage reactance. c) It improves the regulation.A. Discuss in detail about the. tap changing thiransformers. Explain how tap: changing transformer is superior than other voltage control methods and also discuss the disadvantage : transformer. of the tap changing