We are looking into installing a well water pump (480vac, 25hp, 40FLA) with a PowerFlex 755 VFD. The challenge is that the well is located about 700' from the nearest building. The well pump motor comes with a sealed cable which covers the distance in the well shaft (100-150').
Option 1 is to install a drive in an existing building and run roughly 700' of VFD cable out to a box where it splices to the sealed cable. Our vendor says we don't need to use bigger cable to cover the long distance/voltage drop - not sure I agree. He did spec a 25hp heavy duty rated drive & line/load reactors, which I think is proper.
Option 2 is to install the drive panel out in the middle of a field, running 480VAC 3-phase, as well as fiber for Ethernet/IP comms. This seems like more of a pain, having to account for weather, etc.
I prefer option 1 personally, but after reading old posts about VFDs with long motor leads, I'm beginning to wonder which is the better option (and what caveats exist with either option). Any light you can shed on this topic will be appreciated as this is brand new territory for me. Thanks in advance.
Option 1 is to install a drive in an existing building and run roughly 700' of VFD cable out to a box where it splices to the sealed cable. Our vendor says we don't need to use bigger cable to cover the long distance/voltage drop - not sure I agree. He did spec a 25hp heavy duty rated drive & line/load reactors, which I think is proper.
Option 2 is to install the drive panel out in the middle of a field, running 480VAC 3-phase, as well as fiber for Ethernet/IP comms. This seems like more of a pain, having to account for weather, etc.
I prefer option 1 personally, but after reading old posts about VFDs with long motor leads, I'm beginning to wonder which is the better option (and what caveats exist with either option). Any light you can shed on this topic will be appreciated as this is brand new territory for me. Thanks in advance.