Is there a formula for calculating the minimum fan shaft diameter for a fan that's being driven by an electric motor? Shaft is supported by 2 TAF pillow block bearings and is driven via belts & sheaves.
Fan HP Draw: 17.78
Fan RPM: 452
Electric Motor HP: 20
Electric Motor RPM: 1800
Shaft...
I am working on a spread sheet the will de-rate an electric motor if used in high elevations or high ambient conditions. Is there a rule of thumb for de-rating electric motors for use in elevations above 3300' or for use in ambient temps above 104F (40C)? Does it have to be a combo of both...
While doing a run test of an air cooled heat exchanger that uses a 60hp 900 rpm 460V/3PH/60Hz electric motor. The motor was pulling 82 amps as measured on the VFD but the motor at full load is rated for 74.6 amps @ 460 volts. if I calculate the horsepower draw at the 82 amps using the following...
