Hi All, I have a VFD running supply fans and I currently have two values I can see. One is the VFD actual speed percentage from the VFD. The other is a calculated Fan Speed based off of VFD current. (I control off the calculation). The calculation is (Current^.33)*25.54=%. Does anyone know this equation or how I might get it. I am thinking the .33 is based off the VFD model and manufacturer and the 25.54 is a conversion. Cheers!