How the starter control the starting current in three
phase AC Motor?(In DC apply the reistance).
Answer Posted / l.veeraragavan
Normally starting current of induction motor is 6 to 7
times of the full load current.This because high
inersia(mass) of the rotor.So more current require to
move this rotor.So if we insert he resistance in series
with ckt (in starting only, after starting we gradually cut
this resistance from Ckt) ,we can reduce this starting
current. i.e The function of the starter is inclde
resistance during,after starting it will gradullay cut the
resistance.
| Is This Answer Correct ? | 8 Yes | 3 No |
Post New Answer View All Answers
draw 3 phase rectifier diagram
How isolater function when installed inelectrical 440V wiring
why most of junction box vendors providing T5/T6 Temp class jb's for T3 area any special reason?
11 kg trivevter meter has rating of -/5amps. And pt ratio11000/110v and is connected with 11kv ct/pt unit of cr ratio 75/5amps. And pt ratio of 11000/110v while checking accuracy of meter with HT Accuchek meter what value of PT ratio and CT ratio to be filled in Accuchek meter
A parallel flow heat exchanger will perform better than a counter flow heat exchanger. State if the statement is true or false.
WHAT IS FAULT CAPACITY OF HT MOTOR TERMINAL BLOCK? ANY BODY HAVE ANSWER PLZ....POST IT.
a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn
How to calculate earth wire load by formula
does the Trivector Meter of three phase automatically takes care of the low power factor and gives the reading accordigly or it does not take care of the Power factor while giving the readings please explain
hai now i am working as a electrical design engineer in construction field can i get a job in oil and gass field or power plant project as a electrical design engineer?
Could the power factor on electrical system can affect the registration of the kwhr meter or the CT/PT?
What is the tests required for a 132 kV, 400 kV , 765 kV for a Circuit Breaker and Power Transformer before commissioning ?
1. transformer design formula ? 2. how to calculate the primary turns and secondry turns ? 3. core types ? 4. how to find the primary current and secondry current ? 5. how to calculate the stacking factor ? 6. range of fulx density ?
What is the physical significant of power factor?
model question paper for supervisor trainee