how to calculate the speed of a induction motor without
using tacho meter?

Answer Posted / thomas dsouza

The speed is given by the formula N=(120xf)/P where f is
the frequency say 50hz or 60hz and P is the no of poles.

A 4 pole motor shall be running at a speed of =(120x50)/4
that is 1500 rpm.

Is This Answer Correct ?    23 Yes 8 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is reactive power and where it is used.

1199


how can i find ct ratio of meter by seeing name plate of meter and how it should be used in MF calculation if it shows only-/1???

1254


What is the permissible limit of shaft voltage for 6.6 KV motors ? Why? Is there any standard is available?

2090


what does a k rating in a transformer means?

2049


how to calculate percentage impedence at 75 deg C at normal tap

1802






What is the most accurate way of testing ELCB?ELCB is better than RCD?

2882


Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???

1554


is there any role of power factor with frequency variation? and how we can manage the frequency variation?

1634


electrical

1803


What is the unit audit? if our Max demand is something and we found much more unit then how to improve our max demand?

1514


what do you mean by every IC 74 first digit.why are you using this no.why not using another no.

1431


What is the working principle of servo motor? And explain it.

1408


How to check the LM324 Ic

8028


hi this is hema, r there any books in particular for the preparation of the APPSC-A.E.E(electrical), if so please mail me the names ... thank u .

1492


I want the details about BHEL company examination.Can anyone able to help me please.

1597