Emergency Generator RPM vs Motor RPM

[FaradayFF]

Hi All,
This may be a stupid question, but does the rental standby RPMs need to match the motor load RMPs? In other words, if the genset is rated at 1800 RPMs, the motor load needs to be rated at 1800 RPM as well. Are there any other considerations that need to be taken into account when connecting a motor load to a standby system?
Thanks,
EE

 

[LarryFine]

No, there need be no match. 60 Hz is 60 Hz.

Frequency is dependent on both RPM and pole quantity. A generator that runs at 3600 RPM has half as many poles.

 

[GoldDigger]

No, there need be no match. 60 Hz is 60 Hz.

Frequency is dependent on both RPM and pole quantity. A generator that runs at 3600 RPM has half as many poles.

And an induction motor driven with 60 Hz has a variety of possible no-load/no-slip speeds depending on the number of poles in the motor winding scheme. But no faster than 3600 RPM. A universal motor, on the other hand, can have any speed independent of the applied frequency.