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: Q1) I. A 100 kVA, three-phase ideal transformer has 4950 turns on the pr imary and 180 turns on the…

A: As per Bartleby guidelines we are allowed to solve only one question with maximum three subparts,…

Q: A 200-kVA, 3-phase, 50-Hz transformer has a voltage ratio (line voltages) of 33/11-kV and is…

A: For a 3-phase, delta/delta connected transformer Voltage ratio (line voltages) = 33/11-kVRated  kVA…

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: apparent power: 15 kVA, primary:500 V, secondary: 220 V, 50 Hz, idle running current: %7 Idle lost…

A: TRANSFORMER: Transformer is a static device which transfers power from one circuit to another…

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: A 50 kVA ,11000/230V,50-Hz transformer has a high voltage winding resistance of 0.12 and a leakage…

A:

Q: Q1-A 3-phase step down transformer 1200 KVA , 11000/2200 V, 50 Hz .The resistance /phase and leakage…

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

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: 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: 55 V / 220 V, 50 Hz single phase transformer, high voltage (secondary) windings are left idle and…

A: Winding resistance of the secondary referred to the primary, R2'=0.015 Ω

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: 2.2. The figure below shows a radial transmission system with a generator having a  per-unit voltage…

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

A:

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: Find the elements of the equivalent circuit relative to the secondary of a single-phase transformer.…

A:

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: 55 V / 220 V, 50 Hz single phase transformer, high voltage (secondary) windings are left idle and…

A: Referring the resistance at primary side, R1=0.026  Ωand the inductance at secondary side,X1=0.045…

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: We would like to connect a 6 kVA, 120/240 V transformer as an autotransformer to a 120 V source to…

A: As per the guidelines of Bartleby we supposed to answer first three subpart only for solution of…

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: Q- Electrical machines A single-phase 100 kVA, 1000 V/100 V, 50 Hz transformer has a voltage drop of…

A: Given- Single-phase 100 kVA, 1000 V/100 V, 50 Hz transformer. Voltage drop across series impedance…

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

A:

Q: Three-phase, 50 Hz 34500/10500 /Y connected transformer single-phase visible on the high voltage…

A:

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.