Answer Posted / pankaj
DC supply used for control ckt because the system which we are protected by fault(i.e. o.c.,earth fault etc.)is working on A.C. at 50Hz frequency,if their is any fault & if our control system is also same on A.C. then we cant protect the H.T.line.
Hence D.C.supply which are not dependent on A.C.
(i.e.Storage Battery)is used for control ckt.
Is This Answer Correct ? | 3 Yes | 4 No |
Post New Answer View All Answers
how can calculate 1kva generator running time in 1 liter keroscene
what parameters should we check to reduce the power bill
What are the two types of compensation?
WHAT IS THE DIFFERENCE BETWEEN GENERAL INVERTER AND SOLOR INVERTER TELL ME PLZ
Why we use Electrical energy rather than any other type of energy, mostly? Explain behavior of open secondary CT and short circuited secondary PT in energized condition?
how u measure/calculate renge of capacitor,capacitor has no any rating tag.what is the theory of measure of capacitons.
Explain bypass capacitor?
what is meaning of 230volts ac 50hzs ac supply is it rms or maximum to getting ac 230v what amount of max voltage they will send
What are the transformer losses?
in an electronic tri vector meter when the current and voltage sequence changes ? what is the effect of phase sequence on recording of meter
how to i get B licence,i am completed BE electircal and electronics engineering.i want to konw the proceduure to get b licence
While performing stability test of differintial cts how to know the voltage and current on both side of the transformer?
How to select the earthing transformer,for DELTA TO DELTA TRANSFORMER OR ALTERNATOR SIDE.Pls post your answers and calculation.
why on axial hitting up of air blast on hydrogen produced in oil circuit breaker,temperature rises of the core of the arc?
how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.