What is basic difference between Soft Starters And VFD
drives?
- 19 Answers
- 46714 Views
- IBM, I also Faced
- E-Mail Answers
Answer Posted / asif mansoori
VFD is a Drive (continuous controlled operation)
Soft Starter is a Starter (for Smooth Starting torque &
current)
VFD changes frequency applied to the motor and changes its
operating speed.
Soft Starter reduces applied voltage to the motor thereby
reducing the starting torque & hence reduced starting
current.
VFD changes both voltage & frequency.
Soft starter only changes voltage at the starting of motor
but doesn't change frequency.
| Is This Answer Correct ? | 16 Yes | 1 No |
Post New Answer View All Answers
what is mean by NPS (Negative phase sequence)fault? what is the difference between EFR & OCR faults?
What is the difference between a verilog task and a verilog function?
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 ??
IF DISTANCE IS 100METERS B/W AMP.METER AND CURRENT TRANSFORMER WHAT WILL BE AFFECT IN ACCURACY .METER CAN SHOWING ACCURATE CURRENT OR NOT IF NOT WHAT CAN I DO TO GET 100% ACCURACY.
why can the rotor of 3 phase slip ring induction motor not be a 2 phase rotor?
On what basis do you decide the ONAN (Oil Natural air natural) or Dry type transformer for a project?
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?
In hydel power plants, L.A's, S.C's are placed inside the control panel boards. what is the purpose? [already the total body was earthed to ground.]
A car's starter motor draws a current of 100 A at 12,0 V when starting the engine. The mechanical power required to turn the engine is 960 W. At what rate is energy from the battery converted to non-mechanical forms of energy?
What should be current in the Primary and secondary side of 1000KVA (11KV Supply)Transformer.?
what is breathing?
Which motor connection is preferable star-delta or delta-star?
We have a couple of oil tanks at our plant. One of them does not have a lightning arrester installed. My question is it necessary to install an arrestor on every tank or will this particular one be covered by the arrestor installed on the ajdacent tank, Since all the tanks are close to each other. Basically, I want to know that if these arrestors or protection works in a parituclar area of effect or influence. Thanks
Why i receive the GCU fault in my DG Sychronization panel . what all the factors considered for this fault .
To make a basic instrumentation amplifier, it takes A One op-amp with a certain feedback arrangement B Two op-amp and seven resistors C Three op-amps and seven capacitors D Three op-amps and seven resistors
