The efficiency of a 20 kVA 15.4 / 0.4 kV three-phase power transformer is 75,4% for a load with unity power factor at rated power. Relative short circuit voltage% Uk = 30.0 and relative no-load current% I0 = 30.  Since the transformer (Star-delta) is connected;   Note: In 3-phase electrical machines, the current-voltage information given on the label is always line values. Phase valueWhen given, it must be specified separately. Therefore, all current-voltage information given in the question are line values.    1- Calculate the parameters of the primary reduced equivalent circuit

Q: 1. If a 0.6 accuracy class current transformer has a phase angle of + 10 at 100% rated current, the…

A: Ans.(1). Value of 'β=10'

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: (b) A three phase distribution transformer characteristics is shown in Table Q1(b). Referring to…

A: Formula to calculate efficiency of a transformer is: η=n×KVA×cosϕn×KVA×cosϕ+Pi+n2×PCUwhere, n is…

Q: During routine tests of a three phase transformer, measurements of DC resistance between winding…

A: During Routine tests of Three phase Transformers ,Measurement of DC Resistance between winding…

Q: Consider a single phase 2-winding 150 kVA, 2400/240 V, 60 Hz transformer with Reg = 0.00425 N, Xeq =…

A: In this question,  Find the efficiency of the transformer If it's operated at rated current and…

Q: The following information is given in connection with tests performed on 50-kva 4,600/230-volt…

A: We have given the test performance on 50kva 4600/230volts 60cycle transformer open circuit test…

Q: V1 -12V till $1 Key - A R3 www 24kQ R2 2400 Q1 2N3904 D1 1N4739A Vz=9 LED1 Q2 2N3904 R1 33002

A:

Q: 1. The number of devices required to perform the no-load test and the short-circuit test for…

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

Q: Prove that the primary and secondary E.M.F. lag behind the flux by 90 degree. ha?

A: ''Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: I need help with solving the question.

A: 7. Transformers are classified based on their construction into two main categories: Core type…

Q: The hysteresis coefficient of the core material of a power transformer is 110J/ m3. The eddy current…

A:

Q: An 11,000/230-V, 150-kVA, 50-Hz, 1-phase transformer has a core loss of 1.4 kW and full-load Cu loss…

A:

Q: The statement given in which option related to transformers is wrong. A) Power transformers are used…

A: Statement true and false All statement are releted to Transformer .

Q: 8- In core design of power transformer the number of steps increased as the cross-sectional area…

A: In core designing of the power tramsformer, the number of steps are more as the cross section area…

Q: A fault occurs at point F of the system in the figure. Calculate the sub-transient current in phase…

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Q: Q3-(A)- Three single-phase, 50 kVA, 2310/ 230 V, 60 a 3-phase, star /delta, 4000/230V transformer…

A: NOTE- According to the policy, we can answer sub-parts of the first question, kindly post other…

Q: 3.16 A single-phase, 50-k VA, 2400/240-V, 60-Hz distribution transformer has the following…

A: It is given that:

Q: We wish to connect a 6 kVA, 120/240 V transformer as an autotransformer to a 120 V source to supply…

A: "Since you have posted a question with multiple sub parts we will solve first three subpart for you…

Q: Using the apparent power and the terminal voltages as the base quantities in a 44-kVA, 1100/250-V…

A: In this question, we need to determine the base quantities and a turn ratio on as per unit basis.

Q: equivalent winding (a) resistance,(b) reactance and (c) impedance referred to the high voltage side.

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Q: 1 ww ww F w Ju 2

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Q: A transformer rating 15: 8-kva, [(6400) / (320)] -voit ; @ what is the rated kilowatt Out Put at go…

A: To determine the ranted kilowatt output, rated kVAR, as well as rated current output we require to…

Q: A 3-phase transformer, ratio 33/6.6-kV, A/Y, 1-MVA has a primary resistance of 8.5 ohms per phase…

A: 3 phase,E1=33kv,E2=6.6kv,Rating of transformer=1MVA,Primary resistance=8.5ohms,Secondary…

Q: draw a three-phase transformer equivalent circuit and also explain how formulas were derived

A: This is a 3 phase transformer equ6 circuit.

Q: C2 (1). Draw the Schematic diagram and explain the working of LVDT and write any two applications of…

A: We are authorized to answer one question at a time. Since you have not mentioned which question you…

Q: A three – phase transformer has rating of 60 MVA, 220 kV (star) – 33 kV (delta) with leakage…

A: The solution is given below

Q: a) Discuss why a starldelta or delta/star configuration of a three-phase transformer is optimal for…

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Q: answer

A: According to question: A) The no-load current of a transformer changes when voltage greater than the…

Q: Problem 2. A 150-MVA, 220/22-kV, three-phase has the following parameters (in 2): R2 = 0.001 X, =…

A: In the question,  All parameters are given of transformer.  Determine the equivalent circuit…

Q: The efficiency of a 20 kVA 15.4 / 0.4 kV three-phase power transformer is 75.4% for a load with…

A: 1) The primary reduced equivalent circuit is as follows:

Q: A 50 MVA 230/115-kV, A-Y three-phase connected power transformer has a per unit resistance of 0.015…

A: Given rating  of transformer : 50 MVA HV side 230 V   assuming primary side LV side 115 V   assuming…

Q: For an ideal 2-winding transformer, the armpere-turns of the primary winding, N1/1, is equal to the…

A: For the magnetic circuit, the magneto-motive force is given as:

Q: A 125 kVA transformer has primary voltage of 2000 at 60 Hz. Primary turns are 182 and secondary…

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Q: 3/The core of a 300-kVA, 15000/650 V, 50-Hz, 1-ph, core type transformer has across- section of 30…

A: In the given question we note that    The core of   = 300 KVA ,  1500/ 650 V Cross section area is…

Q: Write the voltage as a function of the transformer turns ratio for the following circuits respecting…

A: This question belongs to electrical machine . It is based on the concept of relation between…

Q: Task 1 The three-phase transformer has following rated data: SN=160 kVA (rated apparent power),…

A: Open circuit test: This test is carried out on the low voltage side and determines the no-load…

Q: Consider the three single-phase two-winding transformers shown in Figure. 3. The high-voltage…

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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.