difference between ac motor and dc motor

5 Answers  

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define one ampere?

2 Answers  

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If Dg set load increase 25%, How much increase fuel Consumption (15 kva 2 cylinder DG set)

0 Answers   TATA,

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What is difference between dc three point starter and dc four point starter?

3 Answers   Chettinad,

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Is there any relation between transformer capacity and its bdv?

1 Answers  

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What are dcs and plc?

0 Answers  

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A commercial Building is designed with 14th floor levels with indoor substation of three phase transformer with rated capacity of 1000 Kva.The transformer delivered 65% of its rated capacity at 0.67 power factor lagging.Because of low power factor, the power customer was penalized and certain cost was charged accordingly based on every point percentage lower than 85%.This situation may repeatedly happen on the succeding energy bills of power customer.The power customer is desired to improve its historical power factor of 0.67 lagging and no further penalty be impose by the local power company on the next bill. Q: Identify the appropriate solution you want to offer to Client?.Justify SCIENTIFICALLY and MATHEMATICALLY the principles behind the solution.

0 Answers  

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why use phase displacement in transformer.and effect of phase displacement on transformer

0 Answers   IOCL, ONGC,

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what is the function of a commutator in a dc generator?

14 Answers   College School Exams Tests, NTPC, TCS,

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what happens when we give ac supply to the dc motor?and why?

4 Answers  

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what is meant by star/delta voltages as 440/220 in a 3 phase induction motor, and why it should be connected on STAR IN 3 PHASE SUPPLY

0 Answers   L&T,

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why we somewhere use ryb phase sequance, somewhere use uvw, and somewhere abc??

4 Answers  

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