Question 1. The primary of a 1000 kVA, 11 / 3.3 kV three-phase transformer is connected in star and the secondary in delta. The resistances per phase of these windings are given as 0.375 Ω for the primary winding, 0.095 Ω for the secondary winding, and the leakage reactances per phase are 9.5 Ω for the primary winding and 2 Ω for the secondary winding. Calculate the voltage value and input power that must be applied to the primary when the secondary winding ends of the transformer are short-circuited. (In case of short circuit, the middle arm in the equivalent circuit will be neglected.)

Q: 6. The figure below shows a single-line-diagram of part of a power system. For each transformer in…

A: For a power system, The single line diagram is shown below,

Q: Q.1: The following data refer to a single-phase trans former: Turn ratio (2:1). R1=2.4n, X-5.5 n.…

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Q: Question 5 An ideal transformer is one which has Not yet answered No losses and magnetic leakage…

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Q: The Primary and Secondary induced voltages respectively are: 220.4 volts and 23.96 volts 239.6 volts…

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Q: The transformation ratio based on the induced voltages is: 919.8 91.98 9.198 10

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Q: A transformer has a rated output of 300 kVA at a power factor of 1.2. Determine the rated power…

A: Please comment if you need any clarification. If you find my answer useful please put thumbs up.…

Q: A 400/200 V, single-phase transformer has primary winding resistance of 0.20 and secondary winding…

A: Given a 400/200 V, single phase transformer has, Primary winding resistance, R1=0.2 Ω. Secondary…

Q: The number of turns on the primary and secondary windings of a 1-p transformer are 350 and 42…

A: Given : A single phase transformer having number of turns on the primary and secondary winding are…

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

A: A transformer is an electrical machine which is used in AC circuit to either step up or step down…

Q: Consider a single phase transformer with primary and secondary turns of 1000 and 200 respectively…

A: Given:R1=10.5ΩR2=2.5ΩX1=12.5ΩX2=2.5ΩRm=15.55KΩXm=10KΩK=1000200=5

Q: A normal transformer has a nominal 60 kVA. The nominal primary and secondary voltages are 600 V and…

A: Given data : Transformer rating P=60 kVA Primary voltage V1=600 V Secondary voltage V2=120 V

Q: 7. What is the no-load voltage when the full-load secondary voltage is 108 V and transformer…

A: Given: In a transformer, Full load secondary voltage V2fl=108 V. Transformer regulation VR=10%.

Q: mer has primary and 80 turns on the secondary. The primary 2. A 100 KVA transf and secondary…

A: Given data, The rating is 100kVA. Primary resistance  = 0.3Ω Secondary resistance  = 0.1Ω Primary…

Q: The various types of errors in dynamometer wattmeters are A./Error due to Eddy currents B./Error…

A: The solution is given

Q: Three single phase transformers are connected in a Delta-Wye configuration.  Each transformer is…

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Q: 4. The load cycle of a three-phase 100 kVA, 11/0.4 kV, 50HZ transformer for one day is given in the…

A: Lp

Q: connection of transformer is used to convert three phase to single phase. In a DC machine, e.m.f…

A: Scott T Transformers  is used to convert three phase to single phase.    It  uses teaser transformer…

Q: find the voltage on primary side in pu.

A: Given that, Primary Voltage (V1)=2000 V, Secondary Voltage (V2)=200 V, Primary Impedance (Z1)=0.12+…

Q: 11) Which phenomenon is used in transformer to change the values of alternating voltages and…

A: Given that Which phenomenon is used in transformer to change the values of alternating voltages and…

Q: Draw the equivalent circuit of a 10 KVA, 1860 / 400 V 1-phase transformer with R1=0.4 ohms, R2=0.03…

A: primary referred resistance=R1+R2' R2' is the secondary resistance referred to primary. Similarly…

Q: Three-phase, 50 Hz 34500/10500 T/S ​​connected transformer single-phase visible on the side of the…

A: There is confusion in the transformer connection T/S it would be D/S that is delta-star. Hence,…

Q: A 1150/140V, 50 HZ, 1-phase transformer with cross sectional area of the core is 34 cm2 and maximum…

A: From the Transformer induced voltage expression

Q: Question 6 What is phase angle of voltage induced in primary and secondary windings of transformers…

A: Given  Phase voltage of primary and secondary due to mutual flux is

Q: A single phase, 500 kVA, 4400/440 V transformer has 100 turns in its secondary winding. Then find…

A: Solution: A single phase: KVA =500 KVA     4400/440 V,  turns N2=100, Find: primary winding turns…

Q: The power is transferred by induction and conduction in autotransformers               2-No ­load…

A: Check the given statements are true or false? All statment are related to the transformer.

Q: A 3-phase 10OOKVA, 11000/416 transformer is delta-connected on the primary and star connected on the…

A: A transformer is an electrical machine which is used in AC circuit to either step up or step down…

Q: A current transformer has a phase error of +3°. The phase angle between the primary and secondary…

A: Given: A current transformer has, Phase error = +3°

Q: Ql-phase step down transformer 1250 KVA, 11000/2200 V, 50 Hz . The resistance /phase and leakage…

A: Given: KVA=1250, V1/V2=11000/2200Primary impedance=0.78+j4.8ΩSecondry impedance=0.01+j0.06Ω

Q: A single-phase transformer is required to step down the voltage from 1100 V to 230 V at 50 Hz. The…

A: Given:…

Q: A 100VA single-phase transformer inside a refrigerator has 100 turns in its primary coil and 20…

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Q: A normal transformer has a nominal 60 kVA. The nominal primary and secondary voltages are 600 V and…

A: Given data : Transformer rating P=60 kVA Primary voltage V1=600 V Secondary voltage V2=120 V

Q: A three phase power transformer having a line voltage ratio of 400 V to 33 kV is connected in…

A: We have an three-phase power transformer as shown in figure, Voltage ratio = 400 V / 33 KV Current…

Q: 2.Fringing effect is a phenomena occurs in ........... (a) Transformers. (b) Electrical field. (c)…

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

Q: If the core loss of single phase transformer at full load is 98 W, then the core loss at 25% of load…

A: In the transformer core losses independent of load.   We can also say in the transformer core losses…

Q: 3. Single-phase T1-transformer with a power of 500 kVA and a single-phase T2- with a power of 400…

A: Power factor: This tells how much active power is utilized by the circuit from the apparent power.

Q: Given this transformer with load, what is the expected phase of the primary and secondary voltage?…

A: The solution is provided in the following section.

Q: The primary and secondary voltage drops respectively are: 96.2 volts and 9.62 volts O 0.962 volt and…

A: In this question we need to find a   primary and secondary voltage drop of the given signal phase…

Q: Maximum flux density in the core of a 250 V/3000 V, 50 Hz single phase transformer is 0.6 Wb/m². RMS…

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Q: Calculate the primary leakage reactance of a transformer, supplying a load current of 10 A and 60…

A: Inductance = No. of turns×FluxCurrent Leakage inductance in primary = No. of primary turns×rms value…

Q: What is phase angle of voltage induced in primary and secondary windings of transformers due to…

A: In this question we need to choose a correct option.

Q: mber of turns on the primary and dary windings of a 1-o transformen d 40 respectively. If the…

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Q: 7- A 5KVA, 220/110v, SOHZ 1-phase transformer has Regt and Xeqt of 0.968Q and 1.9630 respectively.…

A: Solution - Given data, 5 KVA, 220/110V 1-phase transformer f = 50 Hz Req1 = 0.968 ohm Xeq1 = 1.963…

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.