Answer / sunil

ac

Answer / nishant2110

for ac only guys..........dc has its own returning path
(called -ve terminal) it cant flow through earth untill
unless -ve terminal of dc source is earthed.

Answer / shiva

AC And DC Both

Answer / sudhansu sekhar samal

ac & dc both

Answer / swarnansu

earthing is done only for ac and in case of dc it have its
own returning,as one of my friend have already answered.
another point is, in HVDC transmission earth can be used as
one of the conductor to reduce the amount of conductor
used.since,there is no interference effect in HVDC system.

Answer / rishikesh borse

Earthing is done only for AC
DC has it own path of returning

why motor burns ?

5 Answers  

IN THE CASE OF AN ELCB, IF THERE IS ANY UNSTABILITY BETWEEN PHASE AND NEUTRAL IT MAY TRIP. BUT MY QUESTION IS WHEN A LOAD IS CONNECTED IN BETWEEN P AND N, THE LOAD CONSUMES SOME POWER AND THERE IS A DIFFERENCE IN NEUTRAL WITH RESPECT TO THE PHASE. THUS ACCORDING TO ME, THE ELCB WILL AUTOMATICALLY OPERATES WHEN EVER THE LOAD CONSUMES-- I KNOW IT IS WRONG. BUT THE SOLUTION IS?????????

1 Answers   KSEB,

can we measure +,-.zero sequence current ....? if so how can ???

2 Answers   NLC,

we have a rewind motor of 2Hp,2800Rpm, 220Volt AC. how can we choose the running capacitor for this motor, any formula for that?

0 Answers  

A 40 kva transformer has a core loss of 400W and a full load copper loss of 800W. What is The proportion of full load at maxmimum efficiency?

1 Answers  

what are the disadvantages of leading P.F(power factor)?

2 Answers  

is it possible to run the any motor when winding grounded? how?

1 Answers  

i need to now what will be the cable size to the following load, transformer to distribution panel distance 110m, load 1000kw, voltage 400v, pf 0.85, permissible voltage drop 2.0%, overhead line, atmospheric temperature 35 degree c.

0 Answers   Bay Fishing Corporation,

calculation of lad carryinc capacity of 6mm2 cross section wire in 415 voltage circuit. What will be the amps.

0 Answers   MAHINDRA,

1.WHAT ARE TRANSMISSION LINE LOSSES DURING WINTER AND SUMMER SEASON? 2.WHAT ARE THE CAUSES/ 3.WHEN THE CORONA IS MORE?.,WHETHER WINTER OR SUMMER? 4. WHAT IS THE PERCENTAGE OF LOSSES IN TRANSMISSION LINE?

1 Answers   Coastal Energen,

how will you determine the short circuit capacity of a network

3 Answers   Dalkia,

Why single core cable required bonding at double end.

1 Answers