Interested to Buy Any Domain ? << Click Here >> for more details...
Why DC excitation is used for alternators? Why cant it be AC?
- 35 Answers
- 78132 Views
- ABB, Ace Info, Alstom, Shalivahana Power, I also Faced
- E-Mail Answers
Answer Posted / samy
DC supply gives constant , steady magneticflux.
but AC supply gives an alternating flux. so in alternators
field give to dc supply.
| Is This Answer Correct ? | 9 Yes | 21 No |
Post New Answer View All Answers
132/66kv sub-station procation ?
static chagre
What is inrush current? how can calculateit? what is the affect of it?
how to interlock 3 nos MCCBs using under voltage coil. please provide me circuit diagram?
What is the purpose of stand by earth fault protection for transformer ?
How to determine the breaking capacity such as break down current and break down voltage for VCB and CT's.
what are the pecularity of shaver sockets ?
Practical condition in 400KV Sub station:- Breaker(open) , isolator(open), Earthing (close) at both end e.g A & B. Now Open A Stn Earthing than Open B stn Earthing (Which have a 50MVA reactor) , AND suddenly show R,Y,B phase 704KV,573KV,118KV respectively. Que is without closing of breaker how it is possible.???? My Whats app No:07621840498 for Further Discussion. Pls experts suggest.
when we design electrical schemes of 11/.415kv distribution..wen and were should we show the relays??what is the function of it?for example..we place EFR Relay CT between transformer neutral link and transformer earth.Like this what are the other type of relays we should use?why?where?Explain please..Thank you
how to calculate current carring capacity of cable and cable selection? 1) copper flexible cable 2) copper armoured cable 3) Aluminium cable
I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.
how meger function
Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm
What is conventional thermal current (Ith)
Explain the term parallel path in dc machin ?
