) An ideal transformer, connected to a 240V mains supplies 12V, 150W lamp. Calculate the transformer turns ratio and current taken from the supply.

Q: A Transformer with 10:1 ratio and rated at 50-kVA, 2400/240-V, 50-Hz is used to step down the…

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Q: 120/480 V, 10 kVA two-winding transformer is to be used as an auto-transformer to supply a 480 V…

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Q: The primary and secondary windings of a 500 kVA transformer have resistances of 0.44 Ω and 0.0027 Ω,…

A: The solution is given below

Q: 2. A single-phase transformer has a rating of 100KVA, 7200V/600V, 60HZ. a. If it is reconnected as…

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Q: 2) The following no-load results are obtained at the excitation branch of a 10, 20 kVA, 2400/240 V,…

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Q: Example 1: A single-phase, 100-kVA, 1000:100-V, 60-Hz transformer has the following test results:…

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Q: A 240/120V, 60HZ ideal transformer is rated at 5KVA. 1) Calculate the a-ratio 2) Calculate the rated…

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Q: 300kVA transformer has primary and secondary winding resistances of 0.5Ω, and 0.0015Ω respectively.…

A: First we will find total total secondary resistance and than copper losses at 40%load. Cupper losses…

Q: 3. A single-phase 30KVA, 2000V/200V, 60Hz distribution transformer is used as a step-down…

A: Apparent Power: The root-mean-square (rms) current is multiplied by the root-mean-square voltage to…

Q: 3.57 A two-winding single-phase transformer rated 60 kVA, 240/1200 V, 60 Hz, has an efficiency of…

A: Transformer : A transformer is a stationary device that transmits electrical energy from one circuit…

Q: ABB company manufactures 44 kVA, 2200/220 V conventional transformer. Using this transformer, design…

A: In autotransformer, the same winding works both primary and secondary. AB- is known as series…

Q: 630kVA 31500/400 DY 50Hz transformer has no load and short circuit tests power measurements are…

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Q: A transformer takes a No load current of 0.64 A and power factor of 0.654 lag, when its primary is…

A: First we will draw phasor diagram , from phasor diagram we will find relation between iron loss…

Q: Q2) A 140-kVA, 7500/277-V distribution transformer has the following resistances and reactances: R,…

A: As per the guidelines of Bartley we supposed to answer first three subpart only.

Q: A 10 kVA, 440/110 volt, single-phase transformer has an efficiency of 96% at a rated load of unity…

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Q: Compute the copper losses at full load if a 500KVA transformer has 90% efficiency at both half-load…

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Q: A single phase transformer takes 10 A on no load at p.f. of 0.2 lagging. The turns ratio is 4: 1…

A: We have a single phase transformer having, No-load current (I) = 10 A Power factor (Cos ϕ0) = 0.2…

Q: Q4:A/The primary and secondary windings of a 30 kVA 76000/230, V, 1-phase transformer have…

A: This question belongs to electrical machine . It is based on the short circuit test of transformer .…

Q: 1) A single-phase 100-kVA, 2,400/240 V, 60-Hz distribution transformer is used as a step-down…

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

A: Given CT secondary resistance =Rc t =0.12 Ω from CT data 200/5A 5P10 20VA Sn =20 VA I=5 A Fn=10

Q: 2.2: The parameters of a 200/3000V, 50HZ single phase transformer are given below: R=0.018 N,…

A: (i) The equivalent circuit for the given problem is,

Q: step-down transformer has a ratio of transformation of 10:1 and is connected to a 2,300- V, 60 hz ac…

A: In this question we will find secondary voltage, primary current , power input and output... Note:-…

Q: A) A single-phase transformer with a ratio of 440/110-V takes a no-load current of 5A at 0.2 power…

A: In the single phase transformer. What is primary current Ip = Io + IS '  Where Is' is secondary…

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

A: Given, Full load KVA=150KVA frequency, f=50Hz core loss=1.4kW full load copper loss =  1.6kW

Q: 1) 10 kVA, single-phase, 2400-V:120-V, 60 Hz transformer has an equivalent impedance referred to LV…

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Q: The maximum efficiency of a 500 – kVA, 3300/500 V, 50 Hz, single phase transformer is 97% and occurs…

A: Given  maximum efficiency ηmax=97% at 3/4 of full load kVA rating of transformer =500kVA impedance…

Q: Question 1 An ideal two winding transformer with a rectangular oross-sectional area of 60cm by 20cm…

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Q: 15-kVA, 2400:240-V, 60-Hz, single-phase transformer has the following circuit parameters expressed…

A: According to given diagram, all parameters are given but only load current is asked. So the…

Q: 1. A 30KVA, 6000/230V, 50Hz single phase transformer has HV and LV winding resistances of 10.2Ω and…

A: Given information about a single phase transformer is, Rated output power S=30 KVA. Induced EMF…

Q: Transformer rated powers and relative short-circuit rates in a step-down transformer station are…

A: For the electrical design of the electrical substation, Short circuit MVA and Short circuit current…

Q: You have been hired as a consultation engineer for a manufacturing company to test and diagnose a…

A: Given: Transformer ratings: 100 kVA, 6600/230 V, 50 Hz The transformer is delivering 80% of full…

Q: A 230-kVA, 2300/230-V, 60-Hz, step-down, two-winding transformer has the following parameters RH =…

A: Given data: S=230 kVARH=1.2 ΩRL=12 mΩXH=3 ΩXL=30 mΩRcH=2 kΩXmH=1.8 kΩVp=2300 V

Q: Q2] The efficiency of a 6600/384V, 200kVA, 1-phase transformer is 97.5% at full load 0.8 power…

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Q: 8.(a) A 100 KVA, 50 Hz, 440/11000 V, 1-phase transformer has an efficiency of 98.5% when supplying…

A: Let Pi → Iron losses   Pl4→Full load copper losses  At full load , 0.8 Power factor efficiency=98.5…

Q: SKVA, 50Hz, single phase transformer, the primary voltage of the transformer is 110V. Reqand X is…

A: Given data, Voltage (Vp)=220 VResistance(Req)=026ΩImpedance(Xeq)=0.4ΩVoltage…

Q: 1. (a) The diagram for a single phase 60 MVA transformer is given below. Convert it to a Step-down…

A: Given 2-winding transformer details are V1/V2=50/100 kV.S=60 MVA The input and output currents of…

Q: A 20-kVA, 8000:480-V distribution transformer has the following resistances and reactances: Rp= 32…

A: Note: We are authorized to answer three subparts at a time, since you have not mentioned which part…

Q: Rated values of an ideal single-phase transformer; 3000VA, 380V/220V’ tour. If the network frequency…

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Q: Open-circuit test Short-circuit test Voc = 480 V Vsc = 10.0 V loc = 0.41 A Isc = 10.6 A %3D Poc = 38…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: A transformer takes a No load current of 0.22 A and power factor of 0.547 lag, when its primary is…

A: Given,  No load current (Io)= 0.22 A No load power factor= 0.547 lagging No load supply voltage…

Q: For a 150 kVA, 2400/240 V transformer, the equivalent circuit parameters are given as R1 = 0.2 Ohm,…

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Q: A 2.4-kVA, 2400/240-V, 50-Hz, step-down transformer has the following parameters: R, = 1.5 a, X, =…

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Q: A 500kVA transformer has an open circuit test of 600W and the full load short circuit test of 700W,…

A: In a transformer, the open circuit test gives total iron loss in the transformer which is 600 W and…

Q: A 15 kVA, 2300/230 volt transformer is under test. With the low side supplied with rated voltage and…

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Q: 4.1 Assume that an ideal transformer used to step down 13.8–2.4kV and that it is fully loaded when…

A: Given:Transormer is ideal,Hence, the i/p KVA = o/p KVAVoltage rating 13.8 kV/ 2.4 kVAlso, o/p KVA =…

Q: A single-phase 100KVA, 1400/200 volt, 50 Hz, distribution transformer is used as a step- down…

A: In this question we need to find a load inductance .

Q: A 150-kVA single-phase transformer has a core loss of 1.5 kW and a full-load Cu loss of 2 kW.…

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Q: A 40 kVA, 6,600/250V, 50 Hz transformer is having total reactance of 35 ohms when referred to…

A: Given Data: Rating = 40 kVA R1 = 10 ohm R2 = 0.2 ohm E1 = 6600 V E2 = 250 V

Q: 1. A single-phase step-down transformer is rated at 10 kVA, 208V/120 V. a. Compute the rated…

A: We can draw the circuit as a) Rated primary current IPrated=SVPrated=10000208=48.1A Rated secondary…

Q: A single phase, 250 kVA, 10kV/2kV 60 Hz transformer has the following equivalent circuit parameters…

A: Given  Single phase transformer   250 KVA,10 Kv/2Kv 60 HzRc(HV)=60.2 kΩ     Xm(HV)=18.44…

Q: A 30-kVA, 8000/230-V distribution transformer has impedance referred to the primary of 20 + j100 N.…

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

Q: A 10-kVA, 450/120V, 50-Hz transformer has the following circuit parameters: R, = 0.12 n, R, = 8.533…

A: As per Bartleby guidelines, since you have posted a question with multiple sub-parts, we will solve…

Q: Example 19. Starting from the ideal transformer, obtain the approximate equivalent circuit of a…

A: The Turns ratio of the transformer = 6  The resistance and Reactance on the primary side are R1 =…

Q: The 40 kVA three-phase transformer is loaded with a load with a back power factor of 0.8, while the…

A: TRANSFORMER: The transformer transfers power from one circuit to another circuit without a change…

Q: The efficiency of a 440/110V, 40kVA, single-phase transformer is 98.77% when delivering ll-load at…

A: A single phase transformer is a device whose input and output are single phase. They are used for…

Q: ABB company manufactures 44 kVA, 2200/220 V conventional transformer. Using this transformer, design…

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Q: A 50-kVA, 2600/1300-V, single-phase transformer has a core loss of 780 W. The transformer has a high…

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Q: A single-phase ideal transformer is rated at 2KVA, 240V/120V. The transformer is supplying rated…

A: A single phase transformer has,  Apparent power (S) = 2 kVA  Voltage ratio is 240/120 V.  Load…

Q: 3. A single-phase 100-kVA, 7200-V/120-V, 60HZ distribution transformer is used as a step down…

A: transformation ratio, primary side impedance, secondary side impedance, primary and secondary side…

Q: 3. A single-phase 30KVA, 2000V/200V, 60HZ distribution transformer is used as a step-down…

A: Given data, A single-phase transformer rating(s)=30kVA E1E2=2000V200V Feeder series impedance=1+j20Ω…

Q: 1. An ideal transformer with N = 2400 and N2 400 is connected with an impedance Z2 across winding 2,…

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Q: A 270 kVA transformer has primary and secondary winding resistances of 0.6Ω, and 0.0016Ω…

A: According to question we have to find the efficiency of transformer at full load with the help of…

Q: 1. A 5-kVA, 110/110-V, single-phase, 50-Hz transformer has full-load efficiency of 95% and an iron…

A: Given:5 kVA, 110-110V, single phase, 50 Hz transformer,full load efficiency of 95%, Iron loss,…

Q: Primary side-reduced equivalent circuit parameters of a 25 KVA, 50 Hz, 4000/400 Volt transformer R1…

A: Given: A 25KVA, 50Hz, 4000/400V transformer in which…

Q: 9. A 10-kVA, 2000/400-V, single-phase transformer has resistances and leakage reactances as follows:…

A: Given, Primary voltage, V1 = 2000 V Secondary voltage, V2 = 400 V So, transformation ratio,…

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.