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Two single phase transformers with equal voltage ratio having impedance of $(0.819+j2.503)\Omega$ and $(0.8+j2.31)\Omega$ with respect to secondary .

electrical machines updated 2.2 years ago by Krishna_Agrawal • 2.7k

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3.5k

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Draw phasor diagram for single phase transformer for lagging & leading power factor

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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Define the ratio error.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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5.8k

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Derive the output equation of a three phase transformer and single phase transformer.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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2.2k

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Calculate the overall dimensions of a 250KVA, 6600/440V, 50Hz three phase core type transformer with data

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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500

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Describe the types of coils used in manufacturing of windings of transformers and explain where each type is used

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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5.2k

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Calculate approximate overall dimensions for a 200KVA, 6600/440 V, 50HZ, 3 phase core type transformer, The following data may be assumed;

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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672

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What is the role of conservator and breather in transformer.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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1.2k

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Determine the main dimensions, number of turns and cross section of conductor

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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829

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What are the advantages of interleaving of joints and Mitred joints in transformer.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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1.6k

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Discuss the mechanical forces developed in transformer winding.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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1.7k

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Calculate the per unit leakage reactance of a 315 KVA, 11000/440 V, 50HZ 3 phase core types transformer with data and delta star connection.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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515

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Explain the different methods of estimating $I\mu$ in a transformer.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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3.7k

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Calculate the active and reactive component of no load current of 400V, 50Hz, single phase transformer

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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491

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With the help of neat sketches, explain different methods of cooling in case of transformer

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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1.4k

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What are the various assumptions in leakage reactance calculation of a core type transformer with LV and HV winding.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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829

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Derive an expression for the reactance of core type transformer with cylindrical concentric coils of equal lengths in terms of mean length turn coil length

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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1.0k

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Specific heat dissipation due to radiation and convection is respectively 6 and $6.5 W/m^{20}C$. Assume that convection is improved by 35% due to provision of tubes.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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1.6k

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The iron loss at the working flux density is 2.6 W/kg. Iron weight $7.8\times 10^3 kg/m^3$ . Stacking factor is 0.9.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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671

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no-load current at 0.4 power factor. calculate phase and ratio error

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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829

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Suggest the different methods to reduce the ratio and phase angle Error of potential transformer.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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934

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Suggest the different methods to reduce the ratio and phase angle error of current transformer.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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581

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Give the construction of current transformer and explain its operation.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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578

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Give the construction of potential transformer and explain its operation.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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570

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If the transformers are having common voltage ratio. Calculate the load shared by each of them

electrical machines updated 2.1 years ago by pedsangini276 • 4.8k

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