engineering recuitment MPPGCL JE 2024 Mock Test Electrical Machines Alternator and Synchronous Motors Synchronous Motor Different Excitations
Which of the following point regarding normal, over and under excitation on a synchronous motor is true?
1
p.f. tends to approach unity with increase in load, for normal excited motors
2
Both with under and over-excitation, change in p.f. is greater than in Ia with increase in load.
3
With normal excitation, when load is decreased, change in Ia is greater than in p.f.
4
As load on the motor decreases, Ia increase regardless of excitation