What is basic difference between Soft Starters And VFD
drives?
- 19 Answers
- 46813 Views
- IBM, I also Faced
- E-Mail Answers
Answer Posted / purushmallya
VFD is Variable Frequency Drive which works controls the
speed of an induction motor on V/F principle and Soft
starters controls the speed by controling the input volage
with power thyristors.
| Is This Answer Correct ? | 44 Yes | 17 No |
Post New Answer View All Answers
differnce between single acting and double acting solenoid valves
Why need 3phase machine double earthing?
what is the relationship between current&voltage in practical purpose ?
Why should we hire you over the others waiting to be interview?
What is an ac motor?
if the number of poles generated in stator and rotor side of an induction motor are different then what will happen and why?
why transformer tank is in rectangular shape what happen when it is in step shape
What is mean 2XWY
i ha done my 10th with 71% ,ITI with 81% 11th with 75% 12th 43% apprentiship with 71% in SAT i secure 1390 ,TOEFL 27 i was refused four times and in all me interview visa officar told that i am not Qualify for study in USA but i completed my 12th yes i got low persentage in my 12th but i seen to much student they already got visa with them 3 or 4 backlocs so why they are refused me ?
Why should be the frequency 50 hz 60hz only why not others like 45, 95 56 or anything , why should we maintain the frequency constant if so why it is only 50 hz 60hz?
WHAT IS THE TECHNICAL SPECIFICATION OF C CURVE & D CURVE LEGRAND MAKE MCB
Why does curving the pole faces in a dc machine contributes to a smoother dc output voltage from it?
I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?
I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.
In what cases (circumstances)we should apply P controller, PD controller, PI controller & PID controller ?
