Answer / mahmood ahmed

Earth affects the calculation of capacitance of three-phase
lines as its presence alters the electric field lines.
Usually the height of the conductors placed on transmission
towers is much larger than the spacing between the
conductors. Therefore the effect of earth can be neglected
for capacitance calculations, especially when balanced
steady state operation of the power system is considered.
However for unbalanced operation when the sum of the three
line currents is not zero, the effect of earth needs to be
considered.

Answer / abbas

what is effect of earth on three phase line capacitance?

Answer / rm

FAILURE OF CT PT

What is the requirement of sulphuric acid in electrical feild?

1 Answers  

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how we can select MCB ratings according to Voltages, Curves.

2 Answers  

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Dear Friends, I have a 500KVA transformer supplying whole factory having 3 phase and single phase mixed loads. Power room has ammeters connected via CTs for individual phase. Now I know that readings shown on meter for each phase say R,Y and B are line currents. But when I want to know the total on transformer do I need to add the currents of all three phases readings shown on meter or value for anyone phase will give me the correct power load on transformer for that point of time. 2. If ammeter shows unbalanced readings for R,Y, B phases say 150, 250 and 300 respectively so can I assume that 150A i.e average of 3 will be the 3phase load currents and remaining will be 1phase currents. Please clarify my doubt.

4 Answers  

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HOW TO CALCULATE HV TEST VOLTAGE FOR ELECTRICAL EQPT.

0 Answers  

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DRAW ACIRCUIT DIAGRAM OF 100 KVA 415V/55-0-55V DELTA TO STAR TRANSFORMER

0 Answers   SRA,

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define B types and C types in MCB ?

3 Answers   Bhel,

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In Plug used in house,Why Earth of the plug more thicker & deeper?

8 Answers   L&T,

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I have recently seen a transformer which had two primary terminals and was connected between two lines,i would like to know what kind of transformer is it?short discription about it,any advantages,purpose of usage of the same.............

8 Answers  

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Single line digram for 11 kV to distribution use go,la and do

0 Answers   SK,

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In our domestic single phase line if you don't have a ground connection (earthing)how will you separately use earth in a specific power supply board.

1 Answers  

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WHY WE ARE EXPRESSING KW-HR AS UNIT OF ELECTRICITY.........?WE CAN EXPRESS IN ANOTHER UNIT.....?

4 Answers   Summit Power,

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What is a feedback in control system?

0 Answers  

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