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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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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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Determine the induced EMFand angular retardation of the rotor when fully loaded at U.P.F.0.8 P.F. lagging ,0.8 P.F.leading

electrical machines updated 2.2 years ago by sagarkolekar ★ 11k

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What are the factors influencing in small scale fading?

electrical machines updated 2.4 years ago by Krishna_Agrawal • 2.7k

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A 4kva 200/400v 50hz single phase transformer gave the following test results

electrical machines updated 19 months ago by yashbeer ★ 11k

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Two three phase transformers rated at 500KVA and 450KVA respectively are connected in parallel to supply a load of 1000KVA at 0.8PF lagging.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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Write the expression for ratio and phase angle error of potential Transformer.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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The requisite flux set up in the core by an mmf of 80a.the frequency is 50hz and the net cross-section of the core is 1000mm2.calculate the ratio and phase angle error.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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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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1.4k

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Write notes on Ideal synchronous machine

electrical machines updated 2.2 years ago by sagarkolekar ★ 11k

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Describe the difference in construction of rotors of alternators used in hydroelectric plants and steam power plants. Draw neat sketches of two types of rotor.

electrical machines updated 2.5 years ago by autinikh234 • 20

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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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State the different thermal classes of insulating materials. What are the desired properties of insulating materials used in electrical machines.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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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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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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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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Discuss the mechanical forces developed in transformer winding.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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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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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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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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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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619

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What are the properties of an ideal insulating material? And state the various factors affecting the same.

electrical machines updated 2.1 years ago by RakeshBhuse • 3.2k

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485

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Discuss the detail classification of magnetic materials.

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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477

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find the voltage regulation of the alternator for full load current at power factor of 0.8 lagging.

electrical machines updated 2.4 years ago by sagarkolekar ★ 11k

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