what is the differnce between ac and dc?

5 Answers  

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What you have to see in transformer after week, month?

0 Answers  

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what is the difference between the 94 lockout relay and 86 lock out relay. I have noticed that the 94 lockout relay is activated when the distance realy is activated and 86 is activated when the 87T differential is activated. but why can't the same lockouts be used for both the protection schemes

10 Answers   ABB,

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Leading power factor means what? what is the power factor value while in power factor is leading? is power factor greater than one? In some cases i heard pf 0.8 leading then what about 0.8 lagging?

1 Answers   Rockfort Engineering,

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HOW TO TEST THE SODIUM VAPOR AND MERCURY VAPOR LAMP ?

1 Answers  

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What is difference between ball screw and lead screw.

2 Answers  

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am commissioning the trafo without connecting the neutral therefore unbalance will occur what is the alternative solution for this?

0 Answers   L&T,

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1 Sq.mm ( Aluminium Cable ) = How much Amphere ( AMP )

4 Answers   Google, TATA,

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what is per unit calculation?looking for simple and strong explanation thk u

0 Answers  

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is synchrnous pannel is need for two eqal rating transformers to run in parallel

1 Answers  

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What should be the overcurrent, instantaneous overcurrent, short cicuit current settings (i.e. how many times of motor full load and what is the time duration) for a motor?

1 Answers  

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The principle of switching circuits for different types of batteries in application of storage systems

0 Answers  

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