Ns=120f/p. what is 120?

Answer Posted / shriram.n

speed=2*60f/p
where
2=?
60=min.
f=frequency
p=pole

we can find speed of motor through below fprmula also
i.e
speed=60f/p
where
60=min.
f=frequency
p=pairs of poles.

example
s=120*50/4=1500rpm

like s=60*50/2(4pole have 2 pairs)=1500rpm

Is This Answer Correct ?    17 Yes 15 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What happens if the negative to earth voltage is greater than positive to earth voltage in the battery of substation?

1189


how to calculate the lightning arrester conductor @ no of earth pits required

1708


What is the transfer function?

716


placement paper samples of mspl company

1600


hi frds, i m electrical engineer.can i get cdr for electrical engineer if u have then send me on my mail id its jayesh_ee88@yahoo.com.please help me frds

1750






defult setting in p220 micom motor proction relay for 11kv,640kw,f.l.a.-40a,1440rpm ht motor?

3356


how to identify vector group of three phase transformer by voltage method?

1248


What is minimum phase system?

757


hi there i am highly enthusiastic about discussing electrical concepts , and hence i wud lyk to invit al do intrested to join me at gtalk and hav a dscussun of the concepts , ad me as a freind . my email id is rakesh.2k99@gmail.com

1744


How to select the proper VSD to operate high inertial load

1361


plz send me the placement interview question and answers of whizchip(technical and apttitude)..i have an interview in next.

4611


Why increase in current leads to increase in conductor temperature?

778


i have completed deee and i've (June2012-feb 2015 experience in electrical maintenance in pvt ltd company.company having HT & LT electrical power.how to apply electrical C-license ,NOW I was resigned my job,what are requirements of applying for c-license

1400


Define delay time.

761


Is there any reason that we get shock on touching phase wire because the earth is at neutral potential? Is there any reason that the earth is at neutral potential because the neutral is earthed in apower station

1637