@gunrunnerjohn posted:Well, if the engine is operating at the correct RPM, that's about all they would be able to do to insure 60hz power, right?
You can deploy a VFD which can correct the frequency to the correct level to an extent. We use a logging & monitoring systems on our gensets, which don't actually do any corrections, but Monitor, alert and shutdown the engine if the voltage or frequency falls out of spec for a predetermined amount of time. I have also seen models that do this plus correct the frequency (VFD), change engine speed to compensate for load variables and generator offsets on the fly.