The rated full load speed is always listed on a standard 3-phase induction motor in RPM.

The question is where does one find the maximum rpm possible for a motor? Is it from the manufacturer only? There is no ref. in NEMA mg1 on this particular subject that I remember.

Is it more a function of insulation rating or mechanical transmission I.E. bearing life?

Carl

Carl Lee Tolbert
Technical Support
AC Drives
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