Answer / meenakshi

u vil be giving 3 phase supply to 3 phase stator winding,a
rotating magnetic field is produced.now rotor is
stationary. i.e, it has not started rotating.only the field
is rotating.now there is flux variation in rotor due to tis
rotating field n hence emf vil be induced in the rotor
bars.becoz of this current vil b flowing in rotor.now main
principle is current carrying conductor placed in a
magnetic field vil experience a torque.n thus rotor
rotates. this much only i kno.

If we have use two power cable for incomer, that time how many use cbct for earth leakage protection? 1 or 2 if 1 way? If 2 way?

0 Answers   REM Electromech Pvt Ltd,

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Please clarify, 1. Is it required to lay two runs of GI wire along with Armoured LT cable if it is laid between one big mains (63Amps TPN SDF) to small main (32A TPN SDF) with proper glanding termination? 2. If the armoured cable with proper glanding is laid from DB to CNC machine, is it required to run two runs of body earthing to the Machine from DB? 3.If the armoured cable with proper glanding is laid from Substation to Hangar, distance is approx. 100 mtrs, is it required to do earthing at shop area though the primary termination at substation is earthed through gland.

0 Answers   HAL,

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hoe to select the cable size in sq mm for certain load?

5 Answers   TCS,

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2 Answers   APEL, BSES,

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difference b/w semiconductor and insulator

5 Answers  

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An automatic water heater is an example of which type of control system?

0 Answers   GE,

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0 Answers   Coal India, Ghana Grid Company,

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1 Answers  

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0 Answers  

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1. what is usage for power factor in industries?? 2.why we need to monitor power factor??

4 Answers   Havells,

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Difference in load break switch, isolator and circuit breaker.

1 Answers   KSEB, L&T, Siemens,

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When the DG is running at the time we can connect to capacitor banK? why it is required or not

1 Answers  

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