If two mechanically coupled alternators deliver power at 50 Hz & 60 Hz respectively, then highest speed of alternators will be 600 rpm

Q.  If two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively, then the highest speed of alternators will be
- Published on 29 Oct 15

a. 1200 rpm
b. 1500 rpm
c. 600 rpm
d. 300 rpm

ANSWER: 600 rpm

Related Content

 

    Discussion

  • mohit rajput   -Posted on 13 Dec 17
    The two coupled alternators have to run at the same speed. Ns = 120f / P or P = 120f / N or P1 / P2 = f1 / N.N / f2 = f1 / f2 = 50 / 60. So, the lowest number of poles (corresponding to higher speed) can be, if two mechanically coupled so, P1 = 5 and P2 = 6. Then the highest speed of motor is (120X50) &frals; 12 = 600 rpm

➨ Post your comment / Share knowledge


Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)
▲