Question { Heavy Engineering Corporation Ltd HECL, 103423 }

what is purpose of using reactor in substations.

Answer

reactor-coil having high inductance compared 2 its
resistance,it's used 2 limit short ckt. currents.

Question { Havells, 9908 }

what is the difference between upper impedance and lower
impedance distance relay?

Answer

upper-above which not operate
lower-below which operate

Question { 7492 }

What is meant by regenerative braking?

Answer

for regenerative braking 2 take place the speed of the motor
should be greater than the rated speed

Question { TATA, 26794 }

what is the speed of current?

Answer

a little than speed ol light

Question { Sodexo, 8694 }

Which actor played the role of Mahatama Gandhi in the film
'Gandhi'?
a)Paresh rawal
b) ben kingsley
c) abhijit

Answer

richard attenborough

Question { CPCL, 10862 }

how to carry out Magnetizing Current Test on Distribution
transformer and what purpose we are doing this test.

Answer

mag. current is tested to see whether all the 3 phases are
properly magnetised or not.If any phase is taking a higher
current then it could be said that in that phase some
conductors are short,So it's better that during this test
variac be used to apply the voltage,one should slowly
increse the voltage or just on-off the multimeter used to
see the quick response,if current is quickly incresing use
variac,to protect the multimeter.