Is a contactor (or master relay) required between incoming lines and a VFD? Th

Is a contactor (or master relay) required between incoming
lines and a VFD? The question goes to safety. If a
contactor were used before the VFD and an e-stop engaged
then the motor will coast to a stop (i.e. VFD loses power)
instead of stopping much faster if the VFD braking fucntion
were used.
It would make more sense to keep power on the VFD.

Question Posted / epderrico

0 Answers
2102 Views
Pride Hotels, I also Faced
E-Mail Answers

No Answer is Posted For this Question
Be the First to Post Answer

Post New Answer

More Electrical Engineering Interview Questions

If one lamp connects between two phases it will glow or not?

0 Answers

explain working of differential protection for a transformer?

1 Answers BARC,

How much costly in percentage wise is sandwich busduct costly than air insulated busduct of any rating?

0 Answers

Which type of moter is used in trains, what is the ratting of supply used explain Working principal?

2 Answers

according to ohms law ,the voltage increases then current is what happened?

4 Answers NTPC,

According to general circuit diagram of 1-Phase t/f , why the primary is not get short circuited ,even though the supply terminals both are directly connected through primary winding?

4 Answers

why high current produce in case of transformer when turns are internally gets shorted.

3 Answers TCS,

What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)

0 Answers Equate,

Transfer of electric power from primary to secondary in a transformer takes place A electrically B magnetically C electro-magnetically D conductively

2 Answers

how we select fuse rating for motor?

6 Answers

why transmission lines traveled in high voltage?

5 Answers TATA,

which cable is preferred PVC OR XLPE for voltage from 220V to 11 KV with proper justification

1 Answers BARC, Sail,

For more Electrical Engineering Interview Questions Click Here