A 150-kVA single-phase transformer has a core loss of 1.5 kW and a full-load Cu loss of 2 kW.            Calculate the efficiency of the transformer (a) at full-load, 0.8 p.f. lagging (b) at one-half full-load unity p.f. Determine also the secondary current at which the efficiency is maximum if the secondary voltage is maintained at its rated value of 240 V

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Q: 7- The Full load. Cu loss and iron loss of a transformer are 920 W and 430 W respectively. (i)…

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Q: A 10 kVA, 2400/240 V, 60 Hz single phase transformer has Z, = 5.2 + j12.5 ohms and Z2 = 0.06 + j0.12…

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A: Given ;1000/400 V1-ϕ transformer with a power 15KVA,Xeq=6 K ohm Re=20 Kohm a)Electrical equivalent…

Q: (b) A single-phase transformer, with primary turns of 500, is delivering full-load of 80 kW at a…

A: Disclaimer:  Since you have asked multipart questions, we will solve the first three subpart for…

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

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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: Find the efficiency of a 150 kVA transformer at 25 % full load at 0.8 p.f. lag if the copper loss at…

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Q: A 15.5-kVA, 2200/210-V transformer has circuit parameters referred to the primary side given in…

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

Q: Important Note Up to this point, an ideal transformer has been described by a ratio given either as…

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

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

Q: In a 100 kVA, 1100/220 V, 50 Hz single-phase transformer with 2000 turns on the high-voltage side,…

A: The solution is given below.

Q: A 1000-VA 380 / 110 V conventional transformer is to be used to supply power from a 490-V source to…

A: From the given data of normal transformer, KVA=1000 VAVP=380 VVS=110 V To the Auto-transformer…

Q: A 40-kVA, 8000/230-V distribution transformer has an impedance referred to the primary of 18 + j80…

A: In this question we need to find a secondary voltage of the transformer.

Q: 1- A 200-kVA transformer has an efficiency of 98 % at full-load. If the maximum efficiency occurs at…

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Q: The maximum efficiency of a transformer occurs when the constant core loss equal the variable copper…

A: The solution is given below

Q: If the open circuit voltage is 225V and the full load voltage is 214V, then the percentage…

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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: 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: 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: A transformer has 500 primary turns and 3000 secondary turns. If the primary voltage is 240V, the…

A: Find explanation below

Q: A single-phase transformer, with primary turns of 500, is delivering full-load of 80 kW at a lagging…

A: output power Po= 80 KW    N1= 500    I2= 227 A ; cos ∅ =0.8  Po= 80 x 103  V2I2 cos ∅ = 80 x 103…

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A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

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 two-winding transformer rated at 100 kVA, is connected as an autotransformer to provide 10kV from…

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

Q: 2- Find the efficiency of a 150 kVA transformer at 25 % full load at 0.8 p.f. lag if the copper loss…

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Q: A 400-turns auto transformer, operating in the step-down mode with 25 percent tap supplies a 4.8…

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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: transformer with a 10:1 ratio and rated at 60kVA, 2200/220V, 60Hz is used to step down the voltage…

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Q: Q1 Calculate the daily efficiency of a single-phase transformer with an output capacity of 350 kVA…

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

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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: Q1 Calculate the daily efficiency of a single-phase transformer with an output capacity of 350 kVA…

A: The solution can be achieved as follows.

Q: Q1 The oil test condition analysis is the ultimate starting point for any HV transformer assessment.…

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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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Q: A 15-kVA 8000/230-V distribution transformer has an impedance referred to the primary of 80 + j3002.…

A: Part (a): The turn ratio of the transformer is determined as: a=8000 V230 V=34.78 The load impedance…

Q: Calculate the daily efficiency of a single-phase transformer with an output capacity of 350 kVA at…

A: “Since you have posted a question with multiple sub-parts, we will solve first four subparts for…

Q: (b) A 40-kVA, 2600/1300-V, single-phase transformer has a core loss of 620 W. The transformer has a…

A: The solution is given below

Q: 302 j722 םרהj 302 The label values of the single-phase transformer whose electrical equivalent…

A: Given: A 20 KVA, 15400 V/240 V, 50 Hz, single-phase transformer has the following equivalent…

Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.