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ELCB
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1))why we run three phase or three different circuit from a single conduit 2)) why not two circuit of different phase run in same conduit?? and why we run same three cicuit of same phae run in single conduit??
WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?
Apparent power is expressed as V * I(Conjugate). Why not in V * I ?
please send me privious exam's queation papers of section engineer(electrical).
Please help me regarding my one concern. - During earth pit testing we noticed that the Clean earth pit and dirty earth pit showing continuity (Resistance value - 5ohm) . I want to know that if both earth pit have separate location and there is not internal looping between PIT then why such continuity is showing on it . Because of this issue the field side all earthing point showing short. In PLC panel we are providing two types of earthing cable which is coming from separate earth pit (Clean and Dirty earth pit) because of earth PIT showing short our PLC is not complying spec . please help regarding this issues.
in Telecom DC system-why positive +ve is made earthed.and - ve is fed to load.
what does a k rating in a transformer means?
why the rotor current becomes in steady state during high slip region? please verify with equations.
We have studied about many techniques for finding the stability of system, ROOT LOCUS, ROUTH, BODE PLOT, POLER PLOT etc. In these which is used where. what are the difference among them... PLZ tell me.......
why would the rotor rotate at sub synchronous speed against the direction of rotating flux when d rotor of 3 phase IM is connected to 3 phase balanced supply and the stator windings are shortcircuited ??
In constant power region of 3-phase IM torque-speed characteristics, if frequency increases slip A does not alter B decreases C increases D none of above
Can 33kva/415v transformer be run underground? If the answer is yes why and if the answer is no why?
what transformer we used normally and upto which kva?
what is data block in plc ? How the values of data block are written and read by hmi ? what is the difference between function and function block ?
in control scheme dc logic wiring commonly using negative loop,what is the reason?if we use positive looping what will happen?
