My son just purchased a used Champion Air compressor and wants to derate the motor and run with a VFD. It's a 10 HP Baldor and he needs to lower to a maximum of 40 amp load due to his current panel can not support a larger current load..He purchased a 7.5KW cheap VFD from China. See attached pictures. I have a few questions I hope someone can help with.
The motor is a standard dual voltage 240/480 3 phase. I will wire for with 240 single to the VFD with 240 3phase output.
1- Being the VFD On/Off has to be controlled by the pressure switch how do I wire it to the VFD. I assume I will need to power it somehow? please advise
2- What would be a good ramp up time to allow it to come up to speed
3- Is there a limit as to the lowest Hz to run for testing but not burn the motor up.
4- What other parameters do I need to set to ensure proper operation.
Any help here would be great
Thanks
Steve in Maine