Answer / k.prakashchandra

Generally V =voltage ,D = disc type ,G =IDMT ,T= trip
circuit ,C= current.Hence VDG may be under/over voltage disc
operated IDMTL relay.CDG similarly current relay.VTT could
be voltage operated trip circuit supervision relay.

Why the resistance grounding (NGR) is better than Solid grounding?

5 Answers  

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1)How much current can a 3-1/2 core 100 mm wire carry? 2)What are the special cables required for explosion proof wiring? 3)In case you do not have coal and salt for earthing, how can you achieve good temporary earthing? 4)One horse power single phase motor is more likely to get hot than a one horse power 3 phase motor. Is it true or false, if true why? 5)What are the different types of soft starters for large motors?please explain?

0 Answers   TATA,

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show that power dissipated by a pure inductor exited by a sinusoidal voltage source v = vm sin wt is zero

1 Answers  

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define as synchronous generator

0 Answers   Enercon,

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If a 3 phase induction motor is in off condition in the conveyor and rotor of the motor keeps moving with the conveyor than the resistance of windings of motor varies. why is it so ??

0 Answers   Jindal,

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I find that underground strip-armoiured,4core,LT PVC cables in an earthed power distribution sytem are occasionly found in charred condition-with no trace of it except ash. Is this because of no proper earth connection/continuity (giving rising to high armour resistance)in the joint enroute or because of insufficient capability (again due to high armour resistance)of cable-armour to carry fault current or due to neglected /unprotected overloading of the cable or due to high armour currents caused by power thefts where only phase(s) are unauthorisely tapped & at the point of poer consumption earth terminal is established by burring underground a not so good earthing rod (or using an underground water pipe for the purpose)

1 Answers  

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what is the differencce inn series and cascade connection??

0 Answers  

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how to calculate regulation constants for over head lines? and what are the regulation constant for raccoon conductor at different voltage level and different P.F?

0 Answers  

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Suppose am having the PF value .8, so how can we say that is it lagging or leading?

11 Answers   Bhel,

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Why we did not feel electric shock in electric train?

1 Answers   NTPC,

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how fan speed decrease or increase by using regulator? thank you

3 Answers  

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To test Transformer we give HT side 440V to see wheather that it is producing 17.6V on LT to verify Voltage ratio is correct or not but when we give the 440V voltage to LT side then what will happen to HT voltage ?

3 Answers   Aditya Birla,

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