The performance for a power factor of 1 of a 200KVA, 3000/380 V single phase transformer...

The performance for a power factor of 1 of a 200KVA, 3000/380 V single phase transformer is 0.98 for both full load and medium load. The vacuum power factor is 0.2 and the voltage drop at full load with a power factor of 0.8 is 4%. Determine the parameters of the equivalent circuit of the transformer referred to the primary side.

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Manojponduru answered 1 year ago

The secondary of a 500kVA, 4400/500 V, 50Hz, single-phase transformer has 500 turns. A) determine emf...

The secondary of a 500kVA, 4400/500 V, 50Hz, single-phase transformer has 500 turns. A) determine emf per unit. B) primary turns. C) secondary full load current D) maximum flux E) gross cross-sectional area of the core for flux density of 1.2 tesla F) if the core is square cross-section find the width of the limb

A single phase motor load draws 5.5 A of current at a 0.83 power factor lagging...

A single phase motor load draws 5.5 A of current at a 0.83 power factor lagging from a 50 Hz 240 V source. A capacitor is connected in parallel to the motor to improve the power factor. (a)If the power factor is improved to unity, find the value of capacitance of the capacitor. (b)If the power factor improves to 0.96, find the value of capacitance of the capacitor. PreviousNext

Problem 3: A single phase 60 Hz two-winding power transformer is rated at 2400V/240V and 100...

Problem 3: A single phase 60 Hz two-winding power transformer is rated at 2400V/240V and 100 kVA with Zeq = 0.5 + j0.8 Ohm. If an autotransformer is built from this conventional transformer to supply a load at 2640V with supply voltage 2400V. Draw the autotransformer and calculate Zeq, the voltage, current and apparent power rating of the auto transformer. Also calculate the apparent power rating advantage of autotransformer over conventional transformer.

1) A 25 kVA transformer supplies a load of 12 kW at power factor of 0.6...

1) A 25 kVA transformer supplies a load of 12 kW at power factor of 0.6 lagging. How much kVA can be added before the transformer is at rated load a)when the added load is at 1.0 pf? b)when the added load is at 0.866 pf leading?

A three phase transformer of 200MVA, 33kV/380kV, Yd11 is delivering nominal power at cosφ = 1....

A three phase transformer of 200MVA, 33kV/380kV, Yd11 is delivering nominal power at cosφ = 1. Calculate the nominal primary and secondary line current. Calculate the winding ratio n of this transformer. The primary line current is 15,9A during an open circuit test. The measured power per phase is then 53kW. During a short circuit test (at nominal current), 271V primary line voltage is measured at cosφ = 0,225. Calculate the total iron losses and total copper losses of this...

Exercises 1. A 25 kVA single-phase transformer has the primary and secondary number of turns of...

Exercises 1. A 25 kVA single-phase transformer has the primary and secondary number of turns of 200 and 400, respectively. The transformer is connected to a 220 V, 50 Hz source. Calculate the (i) turns ratio, and (ii) mutual flux in the core. 2. A 25 kVA, 2200/220 V, 50 Hz single-phase transformer’s low voltage side is short-circuited and the test data recorded from the high voltage side are P=150 W, I1 = 5A and V1 = 40 V. Determine...

A single-phase 300-kVA, 220/4400 V, 60 Hz transformer yielded the following information when tested: High voltage...

A single-phase 300-kVA, 220/4400 V, 60 Hz transformer yielded the following information when tested: High voltage winding open: Voltage=220 V, Current=40 A Power=l 000W Low voltage terminal shorted: Voltage= 195 V, Current=68.18A Power=4000W Find the equivalent circuit of the transformer as viewed from the high voltage Calculate the .efficiency of the transformer when it delivers its rated load at rated terminal voltage and 8 power factor lagging.

Generally, a single-phase power is commonly found in domestic households, whereas a three-phase power is preferable...

Generally, a single-phase power is commonly found in domestic households, whereas a three-phase power is preferable for larger demands. For safety purpose, over-current protection components are compulsory in the electrical distribution systems. i. Explain two advantages of a three-phase system compared to a single-phase system in the distribution system. ii. Briefly describe the characteristic and the function of two types over-current protection device installed in the distribution board (DB) residential building. iii. Miniature circuit breakers (MCB) with different current rating...

Plate values of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V,...

Plate values of a three-phase transformer are given below: 1600 kVA, 15 kV / 400 V, 50 Hz, io = 1.2%; ukN = 6%, idle losses 2450 W, rated copper losses of power 14500 W; Dy5. a) Calculate primary and secondary line and phase currents. b) Secondary at 75% load in power factor with 0.85 inductance and 0.85 capacity calculate the voltage separately. Compare and interpret the results. capacity at what time of day can the upload be seen? To...

Develop a matlab script file to calculate the practical single phase transformer parameters. The program should...

Develop a matlab script file to calculate the practical single phase transformer parameters. The program should ask the user to provide the following individually: S_rated V1_rated V2_rated With secondary shorted P1 V1 With primary open P2 I2 The program should calculate Req Xeq Zeq Gc Ym Bm Make sure your code will pronmpt a message like: “Enter the real power at the primary winding when the secondary winding is shorted, P1=). Do the same for all parameters S, V1_rated, V2_rated,...

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