(B) / Draw the simplified equivalent circuit of single phase transformer referred to primary an write equations for this case.
Q: True or False? Consider a 3 phase transformer with same line to line voltage ratio. The delta…
A: Delta to Delta transformer: The primary phase current is,I1=13IL1The secondary phase currennt…
Q: Explain RVDT (Rotary variable differential transformer) in brief with neat sketch.
A:
Q: Consider Figure 1 of the text. For an ideal phase-shifting transformer, the impedance is unchanged…
A: Referring to the given hints, the impedance of the secondary side seen from the primary side:
Q: Equivalent circuit diagram and electromotive force phasor for the idle operation of a step-up phase…
A: A transformer is a static device, it consist of two winding interlinked by common magnetic circuit…
Q: Explain the open circuit test on single phase transformer.
A: Open circuit test :- It is carried out at rated frequency & rated voltage to determine the core…
Q: - Why polarity checking is necessary for the parallel operation of single phase transformer.
A: Hello. Since you have posted multiple questions and not specified which question to solve. We will…
Q: 1) What are the advantages and disadvantages of 3- phase transformers over 3 single-phase bank of…
A: 1.) The advantages of 3- phase transformers over 3 single-phase bank of transformers are as follows:…
Q: Insulation detorioration of transformer winding due to high temprature is an incepient fault O True…
A: Insulation deterioration of transformer winding due to high temperature is an incipient fault Is it…
Q: Q2. (a) Explain what is per unit system? What are the advantages of per-unit computations? Prove for…
A: Per unit system:-Per unit system is the value expressing system used in an electrical Power systems…
Q: Q3) What are the elements finding from no-load test of single phase transformer?
A: At no load test rated voltage is applied with secondary open circuited. At no load only magnetizing…
Q: laggin Hw2.1-3: Derive the following: • The Cu saving for step-up auto transformer with drawing. •…
A:
Q: The efficiency of transformer is maximum at 10O0% loading? * True False
A: The given statement is a false statement.
Q: "Under saturated core condition, transformer become a source of harmonics" True False
A: In this question , we will write about harmonics in transformer..
Q: 1) How can you prove that Lsec = Lan (RI/ Rs) for matching impedance with the ideal transformer?
A: We are authorized to answer the only single question at a time since you have not mentioned which…
Q: Calculate the cantilever equivalent-circuit parameters as referred to the transformer high-voltage…
A: I have solved for both parts
Q: Draw the vector of a single phase transformer for full load lagging power factor condition of the…
A: The vector of a single phase transformer for full load lagging power factor condition of the load
Q: What conclusions you can come up with after implementing open circuit test on single phase…
A: Conclusions from open circuit test on single phase transformer
Q: The shell type transformer has less leakage flux compared to the core type transformer True False
A: In the question, choose the correct option? "The shell type transformer has less leakage flux…
Q: "The per unit value of impedance, voltage and current of a transformer are not same regardless of…
A: Per unit value is given as Per unit = actual value / base value
Q: In No-Load test circuit of single-phase transformer input power is equal to? In short circuit test…
A: In this question, We need to define the input power in case of open circuit test and short circuit…
Q: The one line diagram of power system is shown in Figure Q.1. Use a common base MVA of 100 MVA and…
A:
Q: What's The relation between turn ratio current ratio annd voltage ratio(if it exists) for single…
A: The transformer is a static device that steps up or steps down the voltage depending upon the turn…
Q: A 50 MVA 230/115-kV, Δ-Y three-phase connected power transformer has a per unit resistance of 0.015…
A: Transformer is a static electrical device which transfers power from one circuit to another circuit…
Q: 4. What do you mean by transformer connection Ydl and Dy11?
A:
Q: . - what information could be obtained from open circuit test on single phase transformer? · what is…
A: Open circuit test is also known as No load test. It is perform by opening the primary of transformer…
Q: Determine the load sharing in MVA for each transformer. Draw the parallel transformer diagram for…
A:
Q: 3.6 For a conceptual single-phase phase-shifting transformer, the primary voltage leads the…
A:
Q: A 50 MVA 230/115-kV, A-Y three-phase connected power transformer has a per unit resistance of 0.015…
A: Need to find the excitation branch element Rc on the low voltage side solve as below
Q: Three single-phase two-winding transformers, each rated 25 MVA, 54.2/5.42 kV, are connected to form…
A: The explanation is as follows.
Q: Determine: A2rdg, A3rdg, IL(ave), PL(ave), & turn ratio of transformer
A: For a given circuit, Vp(rms) =220 V f=50 Hz A1 =400 mA load resistance RL =120 Ω
Q: Given
A:
Q: Q1: What is the influence of transformer connections in single-phase transformers connected for 3-…
A: According to the Bartleby guidelines “Since you have asked multiple question, we will solve the…
Q: Three Phase Transformer connections: Discuss Fully the various methods available for transforming…
A: The methods of transformation of a 3-phase voltage into higher or lower 3-phase voltages is done…
Q: What are the objectives of implementing an open circuit test on single phase transformer
A: In this question we will write objective of open circuit test on single phase transformers...
Q: Which of the following is/are true? a) Base current is proportional to base VA b) Base VA is the…
A: In this question , 4 statements is given about transformers..We have to find out which is true.
Q: The shell type transformer has less leakage flux compared to core type transformer O True False
A: In this question ,we have to write that shell type transformer has less leakage flux or not compared…
Q: Sketch a basic transformer structure. Identify and labelled the core, primary winding and secondary…
A: The correct solution is given below
Q: In a star-delta phase shifting transformer, the zero sequence currents cannot flow through the it…
A: In a star-delta phase shifting transformer, the zero sequence currents cannot flow through the it.
Q: Example 22: In a single-phase transformer, the magnitude of leakage reactance is twice that of…
A: Given that magnitude of leakage reactance of transformer is twice that of resistance of primary and…
Q: Derive the following: • The Cu saving for step-up auto transformer with drawing. • The shift angle…
A: Answer -
Q: When the similar terminals of high voltage and low voltage windings of a transformers are diagonally…
A: A transformer is used to either up or down the voltage level. It can also be used to provide…
Q: A single - phase transformer has 0.9 power factor and takes a no - load current of 0.8A . Determine…
A: single - phase transformer has power factor cos¢= 0.9and takes a no - load current of Io= 0.8A…
Q: Q2. (a) Explain what is per unit system? What are the advantages of per-unit computations? Prove for…
A: PU system: Per Unit system is a quantity expression system used in an electrical power system which…
Q: What are the problems associated with Y-Y three phase transformer connection?
A:
Q: A 60-MVA, 280-kV/500-kV, single-phase transformer has the series impedance referred primary side is…
A: Base impedance=Vbase2MVAbase. per unit impedance=impedance in ohmsbase impedance.
Q: TRUE or FALSE: Purchasing three single-phase transformer bank cost less than one three-phase…
A: In this question we will write in which connection cost is less i.e Purchasing three single-phase…
Q: Q2. (a) Explain what is per unit system? What are the advantages of per-unit computations? Prove for…
A:
Q: A 50-MVA, 190-kV/500-kV, single-phase transformer has the series impedance referred primary side is…
A: Given single phase transformer with50 MVA,190-kv/500-kvSeries impedance referred to primary side…
Q: 5. Write down the equations of a single phase transformer at no-load mode. Give the names of the…
A: Transformer is a static device which is used to step up or down the voltage level or current level.…
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- The ideal transformer windings are eliminated from the per-unit equivalent circuit of a transformer. (a) True (b) FalseThe leakage reactance of a three-phase, 300-MVA,230Y/23-kV transformer is 0.06 per unit based on its own ratings. The Y winding has a solidly grounded neutral. Draw the per-unit equivalent circuit. Neglect the exciting admittance and assume the American Standard phase shift.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
- 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) FalseThree 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.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.
- The ratings of a three-phase, three-winding transformer are Primary: Y connected, 66kV,15MVA Secondary: Y connected, 13.2kV,10MVA Tertiary: connected, 2.3kV,5MVA Neglecting resistances and exciting current, the leakage reactances are: XPS=0.09 per unit on a 15-MVA,66-kV base XPT=0.08 per unit on a 15-MVA,66-kV base XST=0.05 per unit on a 10-MVA,13.2-kV base Determine the per-unit reactances of the per-phase equivalent circuit using a base of 15 MVA and 66 kV for the primary.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-volt,60-Hz distribution transformer has a 1-ohm equivalent leakage reactance and a 5000-ohm magnetizing reactance referred to the high-voltage side. If rated voltage is applied to the high-voltage winding, calculate the open-circuit secondary voltage. Neglect I2RandGc2V losses. Assume equal series leakage reactances for the primary and the referred secondary.
- 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.A three-phase transformer is rated 1000MVA,220Y/22kV. The Y-equivalent short-circuit impedance, considered equal to the leakage reactance, measured on the low-voltage side is 0.1. Compute the per-unit reactance of the transformer. In a system in which the base on the high-voltage side of the transformer is 100MVA,230kV what value of the per-unit reactance should be used to represent this transformer?In per-unit equivalent circuits of practical three-phase transformers, under balanced thr-phase operation, in which of the following connect ions would a phase-shifting transformer come up? (a) Y-Y (b) Y- (c) -