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A 4kva 200/400v 50hz single phase transformer gave the following test results
electrical machines updated 22 months ago by yashbeer ★ 11k
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calculate the flux in the core and ratio error at full load. Neglect leakage reactance and assume the iron loss in core to be 105w at full load. the magnetizing mmf is 100
electrical machines updated 2.3 years ago by sagarkolekar ★ 11k
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State advantages and disadvantages of short pitch winding, distributed winding in alternator and derive an expression for distribution factor
electrical machines updated 2.3 years ago by sagarkolekar ★ 11k
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521
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If they operated in parallel how they will share the load of 3000KW at Pf 0.9 lagging.
electrical machines updated 2.3 years ago by sagarkolekar ★ 11k
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How the losses can be minimize in case of single phase transformer.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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508
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It is connected as a step up auto transformer with low voltage winding additively in series with the high voltage winding.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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616
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Explain the principle of auto-transformer.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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Explain connection and phasor diagram of Dy11 and Yy6 transformer.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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1.1k
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Calculate pf and load shared by each transformer.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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586
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Draw and Explain Scott connection of three phase transformer
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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1.4k
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Explain Ddo phasor group of three phase transformer connection along with connection diagram and phasor diagram.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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569
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Draw and Explain the back to back test conducted on two identical transformers.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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Explain Sumpners test on single phase transformer
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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Explain how the core flux setup in transformer is maintain constant from no-load to full load.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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687
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Draw and Explain the OC and SC Test on single phase transformer and hence obtain the equivalent circuit diagram.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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655
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Justify the sentence that we obtain iron loss from OC Test and Copper loss from SC Test.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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712
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With the help of phasor diagram, derive the equation to obtain approximate voltage regulation in single phase transformer.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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876
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Write the parameters that can be calculated by using OC & SC test in transformer.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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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 2.3 years ago by RakeshBhuse • 3.2k
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952
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Two single phase transformers which have the same turns ratio are connected in parallel and supply a total load of 800KW at 0.8pf lagging. The rating are as follows.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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636
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Transmission and distriubution
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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614
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Explain the conditions for satisfactory parallel operation of transformer in detail.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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524
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Explain cowre losses in transformer
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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747
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With help of phasor diagram derive the equation to obtain voltage regulation in single phase transformer.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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825
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What are the advantages and disadvantages of autotransformer over two winding transformer.
electrical machines updated 2.3 years ago by RakeshBhuse • 3.2k
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