23 January 2021
Wants to use Altivar 61 or Altivar 71 drives on delta power system.
Altivar ATV61 and ATV71
Needs to know if the RFI filter needs to be disabled when using a corner grounded delta system?
As long as the input voltage remains within the normal range there should not be a problem.
This should be treated the same way as an impedance grounded system.
Remove the jumper to the left of the power terminal.
See the section of the installation manual for Operation on an IT (Isolated or impedance grounded neutral) system for details.
See the drives installation manual for more information and location of the RFI's filter tab.
The figure 1 example below is for the low horsepower ATV61 and ATV71 drives.