when we are going to higher voltage level in substations why we are using Sf6 circuit breakers instead of Vacuum circuit breakers.

3 Answers  

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Direction of flow of active power and reactive power with logic?

0 Answers  

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How to calculate the Efficiency of Chiller

0 Answers   Knight Frank, L&T,

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how to read idmt curva

0 Answers  

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when qty of cable being purchased is not sufficient according to the standard,what should the inspector do to ensure its quality according to the standard?

0 Answers  

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IS HI-POT TEST DONE ON A TRANSFORMER - YES OR NO? WHY?

4 Answers  

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what happens if we give 1-ph supply for 3-ph Bridge rectifier...??

2 Answers   Sanelec,

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what will happen if the frequency supplied is more than the frequency of the instrument...?

3 Answers  

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why our power production in multiple of 11, in strictlly asking why our o/p voltage of alternators is 11kv only and whynot graterthan 15 and016KV?

4 Answers  

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what are the preventive maintanance actions taken for air circuit breaker? please answer me

0 Answers   MAHINDRA,

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what is ground fault current? is there any current flow takes place through ground? is it possible? if it's possible whether it affect human beings on earth near the fault or not?

2 Answers  

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how one can know the charging time, discharging time of a 12 VDC battery ? If i have a battery of 12 VDC , 4.0 AH , how long will it take to charge from a charger (power supply) of input 220 V , Output 15 V and output current of 3000 mA and how long will it take to discharge whether using or not ? How much backup will it give ?

1 Answers   ONGC,

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