what is the function of short circuit maintenance ct and droop ct.

1 Answers   L&T,

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In the solution of load flow eqation, Newton raphson method is superior to the gauss siedal method because (a)the time taken to perform one iteration in the NR method is less when compared to GS method (b)the number of iterations required in the NR method is more compared to that in the GS method (c)the number of iterations required is dependant on the size of the system in the NR method (d)convergence characteristics of the NR mehod are not affected by the selection of the slack bus

1 Answers  

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is there any difference between inverter and a battery

2 Answers   Cummins,

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what is meant by servo motor ? how its operating either AC or DC?

0 Answers  

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what is first pole to clear factor

1 Answers  

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how to define vector group of transformer

1 Answers   Engro, Reliance, TATA,

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What is the need of earthing transformer for delta side of a transformer. (Think of a line section between a star/delta transformer at a grid substation and delta/star transformer at a village. An earthing transformer is there at the delta side of the star/delta transformer at grid substation). As there are no ground reference there will not be fault current if a one phase is grounded. Further L-L phase will be sensed by the primary side of star/delta transformer as a L-G fault. So why an earthing transformer is required at delta side

0 Answers   CEB,

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1. what is the power factor of a purely inductive load? 2. Which type of transformer connection is preferred in case of power supply transformers? 3. In power transformer usually which winding is closer to the core? 4. what will happen to the generated emf if the no. of poles of an alternator is increased?

5 Answers  

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where we use compound motors in real time and why?

2 Answers   TATA,

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why core of transformer in square or rectangular why not in circle or ellipse if this what happens

2 Answers  

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how can we chack a capacitor in acircuit

2 Answers  

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What happen if 200KVAR capacitor continuesly connected to load and all the plant machinaries are not in working?

4 Answers  

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