We have an application where we have several AB powerflex 40 VFD's
which are running 8 fans each all have the same FLA of 1.2, 1hp 575 v. They had installed seperate solid state overloads one per motor we have a line reactor AB cat number1321-3r12-b 2.5 mh, 12 a on the input to the drive
on the output side of the drive we have a TCI drive output filter KLCU12A1 which is 3ph 600 Vmx 12Amx. The drives are configure Volts/hertz linear ramp. We were informed froma Rockwell field technician that senserless vector should not be used on multidrive applications. I'm still detecting large inrush currents on motor startup and am looking for recommendations on how we can offer better protection as we have been experiencing output burnouts on the VFD's. Also the average distance from the drive to motors is 200 feet farthest is 327 ft
which are running 8 fans each all have the same FLA of 1.2, 1hp 575 v. They had installed seperate solid state overloads one per motor we have a line reactor AB cat number1321-3r12-b 2.5 mh, 12 a on the input to the drive
on the output side of the drive we have a TCI drive output filter KLCU12A1 which is 3ph 600 Vmx 12Amx. The drives are configure Volts/hertz linear ramp. We were informed froma Rockwell field technician that senserless vector should not be used on multidrive applications. I'm still detecting large inrush currents on motor startup and am looking for recommendations on how we can offer better protection as we have been experiencing output burnouts on the VFD's. Also the average distance from the drive to motors is 200 feet farthest is 327 ft