Answer / srujan

In generators and transformers the maximum possible load is
decided by temperature rise of the machine.

And all of us know the temperature rise is directly
prepotional to Current in machine and which is prepotional
to KVA.


But in the case of motor the possible maximum loading is
depends on the output torque.So its ratyeing is always in
KW.

Answer / sundar

generator is produced in current but supply the current from
motor is running in this differance between kva & kw

I want Primary side delta and Sec side Star connection transformer . but i have received Star - Star transformer ,shall i use the same transformer by giving the only 3 ph on Primary side without Neutral connection on the Starpoint.

5 Answers  

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what is Different between Bilinear and Unilenier?

0 Answers   ABB,

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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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What is dynamo?How it works and what is the function of dynamo in a DG.

0 Answers  

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1. A bomber drops a bomb from an aircraft flying at 2000 km/hr. at an altitude of 7km. The speed at which the bomb will strike the earth would be

0 Answers   KNJ,

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what is the role of impedance in transformer?based on secondary f.l.current(139 amps) and impedance(4.07) of 415/415v of 100 kva transformer. what is the primary current?

1 Answers  

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In PT the coil is wound on?

3 Answers   DVC,

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Transformer rating=> 15/20 MVA.Why there are two raings? What should be the rating of the fuse at the secondary if the voltage level is 13.8KV/4.16KV?

1 Answers   Bhel,

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what are the main hormonics in ac?

1 Answers  

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why the efficiency of the dc machine is high ,when it is operated as a generator?

3 Answers  

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what are the factors to be considered while design the breaker either HT or LT??

0 Answers  

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rating of ups??

1 Answers  

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