Explanation: f = PN/120 Hz 6. A synchronous machine can be connected to an energy system only when ___________
A. frequency/rotational speed matches
B. voltage matches
C. current matches
D. power matches
Answer:A
Explanation: f = PN/120 Hz 6. A synchronous machine can be connected to an energy system only when ___________
A. frequency/rotational speed matches B. voltage matches C. current matches D. power matches
Explanation: For successful operation, the rotational speed/frequency of the synchronous machine must synchronize with the frequency of the energy system, and this is the reason for calling it a synchronous machine. 7. In larger DC machines, the reason behind using fabricated steel instead of cast iron in the manufacture of yoke is ?