What is basic difference between Soft Starters And VFD
drives?
Answer Posted / raju
i think VFDs are next version of soft starters. In VFD we
can varry the speed from zero RPM to Full load RPM. and
come back from Full load RPM to zero speed very smoothly.
But in Soft starters starting will be smoothly but after
reaching the full load speed the Soft starter shall be by
passed and soft starter cannot be controlled the speed.
Cost wise VFD is more costlier than VFD. In reliability
point of vied VFD is better
| Is This Answer Correct ? | 110 Yes | 24 No |
Post New Answer View All Answers
which book to refer in electrical engineering for iocl exam & which book for general english.
how to do the ductor test?
For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?
i need list of swg(standard wire guage) or area of conductor v/s current carrying capacity of conductor copper & alluminium...
How to check 11000/1.732 to 110/1.732 Potentila transformer (PT)?
WHAT IS THE MEANING OF BALANCED / UNBALANCED IN STABILIZER TYPES.
What is the effect on in Zone and out zone fault if Phase side CT is Vk/2<30 mA and Neutral side is CT is Vk/4<30 mA for Transformer REF protection
What is the Basic Difference bitween Long Shunt Connection and Short Shunt Connection in DC Generator?
In what condition the HT fuse breakes?
HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.
hey guys i scored 910 on GRE and 67 on TOEFL respectively.I have an aggregate of about 74%in my B tech.For which colleges should i apply for an MS program in electrical engineering.I am looking for colleges in NJ,SC,NC,GEORGIA, NY. Please reply with a good response.....
What is the disadvantage in proportional controller?
what is the use of the circle diagram
during installation time of transformer and alternator which points we have to observed?
what is earthing transformer? draw the winding dia.of earthing transformer.