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  1. gumper00

    Electric Motors with VFD

    Thanks for all your responses. I have some more info that might make a difference. This is a completely new installation. There are numerous fans where this is taking place. The new info is two plug fans, each 37500 CFM for a total supply CFM of 75000, at 41.64 BHP each with 50 HP and 900...
  2. gumper00

    Electric Motors with VFD

    Thanks, I will check with the MFR.
  3. gumper00

    Electric Motors with VFD

    Does it matter?
  4. gumper00

    Electric Motors with VFD

    Is it common practice to operate a motor above it rated RPM using a VFD? The fan is a direct drive with a 900 RPM motor. The design fan RPM is 1,250 and the vendor wants to operate the motor at 1,250 using the VFD.
  5. gumper00

    Electric Motors with VFD

    Is it common practice to operate a motor above it rated nampeplate RPM using a VFD? The direct drive fan has a 900 RPM motor but the design fan RPM is 1,250 RPM. The vendor is saying you can use the VFD to operate the fan at design RPM.

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