A 10 kVA, 440/110 volt, single-phase transformer has an efficiency of 96% at a rated load of unity power factor. The full load copper loss is 250 watts. If this transformer is to be converted as a 550/440-volt autotransformer, determine its efficiency when supplying full load at 8.55 power factor.

Q: (a) A 220 / 400V, 13KVA, 50Hz single phase transformer has at full load, a copper load of 140W. If…

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Q: A 200 – MVA, 15/200 kV single-phase power transformer has a per – unit resistance of 1.2 percent…

A: Part (1): Consider the base voltage to be 15 V and the base MVA to be 200 MVA. Since the base…

Q: Using various types of transformers, give 10 impacts to the end-users per type of transformer in…

A: Transformer: Transformer is the static device that either step-up or step-down the voltage. It works…

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: A 12-kVA, 240/120-V conventional transformer is to be reconnected as auto-transformer to supply…

A: Connect the auto transformer winding as below

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: ii) Derive the expression of EMF induced in a Transformer? Why is a transformer rated in KVA?

A: The basic circuit of the transformer is shown below: In the above circuit: Current losses are…

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…

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Q: Using various types of transformers, give 10 impacts to the end-users per type of transformer in…

A: In this solution physical features, advantages and applications of Autotransformer, Power…

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

A: In this question , transformer cu loss and iron loss given..Output KVA given..We have to find out…

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

A: Given a single phase transformer with the following values   10 KVA ,2400v/120v ,60 Hz  Core loss…

Q: What are the advantages of the star/star connected transformer? And why it is preferred by many…

A: advantages of the star/star connected transformer?

Q: You have been tasked with comparing the transformer from ABC Ltd. with a 65 kVA, 11000 V/415 V, 50…

A: Given R1=10 ΩR2 =0.05 ΩX1 =20 ΩX2 =0.12 ΩXm =20 kΩRc = 200 kΩS =65 kVApower factor =0.8V2V1=11000415

Q: 3.14 A single-phase 50-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down…

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

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Q: A transformer takes a current of 0.8A when its primary is connected to a 240 volt, 50 Hzsupply, the…

A: Given data :  No-load current io=0.8A Supply voltage Vo=240V Open circuit loss Po=72W

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: A 100-kVA, 4800-480-V, 60-Hz, single-phhase distributión has 6 V/turn and an equivalent impedance…

A: Given data: Impedance referred to the high side : 8.48 Ω Output power required: 50 KVA Primary…

Q: A 400-k VA, 2300 230, 60-hz transformer supplies a 0.8 lagging power-factor load whose KVA Is…

A: The efficiency of the transformer is given by the relation, Where, x = percent rated load…

Q: 60 KVA, 415-220 V, 50 Hz transformer I.(exciting current)=2% of the rated current current at 0.75…

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Q: QI 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 data: Core loss = 1.4 kW  Full load Copper  loss= 1.6 kW Full load KVA =150 Power factor…

Q: a. Find the full-load regulation of this transformer at a power factor of 0.8 lagging. b. Find the…

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Q: 2) 50 kVA, 2300 V / 230 V transformer draws 750 W power and 0.5 A current at rated idle primary…

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

Q: The efficiency of a 400 kVA, 1-phase transformer is 95 % when delivering full load at 0.8 power…

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Q: A 10-kVA, 480/120-V conventional transformer is to be reconnected as auto-transformer to supply…

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Q: Question # 2: A 2000/400 V, 100 kVA, 60 Hz step-down single-phase transformer has a primary and…

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Q: The required no-load voltage ratio in a 150 kVA single-phase 50 Hz core-type, two-winding…

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Q: Calculate voltage ratio and turn ratio of a 3-phase transformer with data: VIN=6kV, V2N=400V, Dy,

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

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

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Q: A 400/100 V, 5 kVA single-phase two winding transformer is to be used as an auto-transformer to…

A: It is given that: two winding transformer:400/100 Vcosϕ=0.8 laggingη=0.95 %Auto transformer:500/400

Q: The information shown in the table below was obtained when a 60-VA, 120/208 V, 60 Hz transformer was…

A: Given, Power Rating = 60 VA Voltage ratings of the transformer 120/208 V Core loss components from…

Q: Q/ The efficiency of a 400-kVA, single-phase, 60-Hz transformer is 98.77% when delivering full-load…

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Q: A 500 kVA, 3-Phase ,11 kV / 430 V distribution transformer with the equivalent percent resistance…

A: Given, Three Phase Transformer Voltage Rating= 11 KV/ 430V Output power= 500 KVA Equivalent…

Q: A 2000/400 V, 100 kVA, 60 Hz step-down single-phase transformer has a primary and secondary…

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Q: A 600 kVA, 1-ph transformer has an efficiency of 92 % both at full- oad and half-load at unity power…

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Q: Illustrate the equivalent circuit of this transformer referred to the high voltage side of the…

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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: 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: Solve for the efficiency at three-eight load at 0.85 power factor of a 10-kVA single phase…

A: As per our guidelines, we are supposed to answer only one question. Kindly repost the question as a…

Q: A 120 / 180 Volts Autotransformer draws power a 120 Volts and supplies power to a 2 kW load at 180…

A: Given: The transformer voltage ratio is 120 V/180 V  Consider the power supplied to the first load…

Q: A 600 kVA, 1-phase transformer has an efficiency of 92 % both at full-load and half- load at unity…

A: Given, Output kVA rating = 600 kVA Efficiency, η=92 % (both at full-load and half-load) Power…

Q: A 10-kVA, 2200/400 V, single phase distribution transformer has a primary and secondary winding…

A: Given that  10-kVA, 2200/400 V, single phase distribution transformer  primary and secondary winding…

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

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Q: A 10-kVA, 480/120-V conventional transformer is to be reconnected as auto-transformer to supply…

A: We know KVA rating formula , we will find out current from given data ,then we will multiply both…

Q: A single-phase, 10-kVA, 480/120-V transformer is to be used as an autotransformer tying a 600-V…

A: The base impedance referred to the primary side is determined as: Zb=(480 V)210 KvA=23.04 ohmFor…

Q: 4. Calculate the full-load primary and secondary currents of a 5-kva 2,400/120-volt transformer.

A: Given power S = 5KVA   Primary voltage PV = 2400  Full load primary current = S/PV  = 5000/2400 =…

Q: The primary and secondary windings of a 500-kVA, 11-kV/415-V, single-phase transformer have…

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Q: A 5000-VA, 480/120-V conventional two-winding transformer is to be used to supply power from a 600-V…

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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.