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-) Draw the primary reduced equivalent circuit. 2-) What is the power value measured in the short circuit test of this transformer? 3-) What is the iron loss value of this transformer ?

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: 2. A compound compression refrigerating system using R-12 as a refrigerant consists of two…

A: Given  ; T7 = 40o cT3 =30o c T5 =10o c @ 10TR  (RE2)T1 = -10o c @ 30 TE (RE1)

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

A: Transformer is the static device it work on the principle of faraday law of mutual inductance. It…

Q: A 3-phase 100OKVA, 11000/416 transformer is delta- connected on the primary and star connected on…

A: Transformation ratio K=0.416kV3*11kV=0.0218Per phaes…

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: Discuss the role of transformers in power distribution. How do step-up and step-down transformers…

A: Transformers are electrical devices which used to change the voltage levels with constant power and…

Q: A 2400/240 V, 200 kVA, single phase transformer has a core loss of 1.8 kW at rated voltage. Its…

A: A 2400/240 V, 200 kVA Single phase transformer- Core loss Pe=1.8 kW, Equivalent resistance Reqv=1.1%…

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: A 400/200 volts transformer has pu impedance of 0.05. The HV side voltage required to circulate full…

A: Per unit impedance Z=0.05 pu, 400/200 volts transformer- To Find- The value of the HV side voltage…

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: 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: A 3-phase 100OKVA, 11000/416 transformer is delta-connected on the primary and star connected on the…

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

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: The values ​​of a phase measured from the no-load (no load) operation and short circuit test of a…

A:

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: Ql-phase step down transformer 1250 KVA, 1 1000/2200 V, 50 Hz .The resistance /phase and leakage…

A:

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.

A:

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: 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…

A:

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: Two transformers A and B of different ratings but equal voltage ratios share a load of 900 kVA at…

A: Load  SL = 900 KVA   0.8 pf lagging transformer  A  rating is  600 KVA transformer  B  rating is…

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 150 kVA, 2500/250 V, 50 Hz, single phase transformer has a no-load current of 0.75 A and a core…

A:

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: Single phase half wave AC-AC converter has a resistance of R = 50 ohms. Input voltage is given as…

A: Given in the question: Load resistance: RL = 50 Ohms Input voltage, V = 230V Firing angle, α=600…

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

A:

Q: N1: N2 In-1A Vac 60 Hz Ver Center tapped 5000uF D2 Output Waveform: Vpp Voc 12V

A:

Q: The ratings of a three-winding transformer are: Primary: Y connected, 66kV, 20MVA Secondary: Y…

A: Given data: System base=20 MVA a) The expression for the per unit value of reactance Xst is given…

Q: What is the relationship between primary induced emf( E1) and applied voltage (V1) of a Transformer?…

A: The relationship between primary induced emf( E1) and applied voltage (V1)

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.