Answer / pradeep kumar

as electricity is caused by electrical field and we all know that in light travel with a speed of 3x10^8. in the direction perpendicular to electric and magnetic field.
so speed of electricity is 3x10^8.

if we look on phasor of the transformer vaoltage is 180 oppsite at primary and the secondary so to improve a power factor is secondary should kept negative to improve it primary side means is -.90 became +.90 at other side

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How Many safety of Air circuit breaker

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what are the major & minor faults that occur in an inverter and in UPS ? And how to repair and resolve them ?

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what will be the effect of leading power factor on turbogenerator (and system) that is running parallel with other TG.

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features of hbc fuses

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What is derating?, Why it is necessary, it is same for all means for drives, motors,and cables.

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what is the generator rating for 40 amp load of 3phase motor.?? 400v voltage of generator... plz tell me with formula its urgent...plzzz... and also tell me that this 40 amp at all phases mean 40 amp on red,40 amp on yellow,40 amp on blue...... or the total sum of that 3phase is 40 amp....

7 Answers  

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When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number

0 Answers   TATA,

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int a,b ; a=b=10 ; if(a>b){ printf ("%d",a)}; no error output is a=10

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Is there a diode made that works with AC 120 volt 20 amp? If so can it completely stop all current flow in 1 direction at all times?

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.if the vector group of two transformers is not same n tey r connected in parallel operation then what will happen?

2 Answers   ABB,

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Match the following a)(X'+Y') b)X'Y' C)XY 1)NAND 2)NOR 3)Carry

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