What is basic difference between Soft Starters And VFD
drives?

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


Please Help Members By Posting Answers For Below Questions

can u tell me the promotion from oiller to enginer

1438


What is Negative Potential Bias

1796


why did youi choose this career?

1740


can mini-curcuit supply MIL-tested transformer !

1634


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.

1578






what about electrical pannel.? What is meant by plc pannel.?

1882


How to design inductive load for 3 phase 440v and maximum 5 amps for star or delta? Can we use a 15kW, 1450rpm motor for 15kW, 960rpm apllication?If yes.how......n.if thesame motor used what`s it`s sideeefect.

2055


how to work droop ct in generating station

2151


how is control wiring coding is done in a CRP panel ?

1550


why transformer ratings in kva? & DG ratings in kva? & Motor ratings in kw/HP?

1120


Why strting torqe high in inducation motor?

1661


can you any one give exact mathematical relation between AC current and DC current?

1409


Explain how you intend to work under pressure to meet up with deadline target?

1936


How to know th details about an electrical Drawing ? Please mention the easy method.

2010


If I bring a basic electric meter from the States and hook it up in Costa Rica in a development that has only one transformer for the 50 homes, will it still be accurate regarding the usage of kilowatt hours?

1504