kallileo
Lifetime Supporting Member
I have come across an installation on a farm where a Delta 3.7KW ac drive is controlling three 1.1KW ventilation fans. So they asked me for help because when all the fans are on the RFID detection system on the calf feeding machine stops detecting the calves entering the feeding box.
The motor cables are shielded and grounded both at the motors as well the drive sides but they are really really long. The cables are 30, 40 and 70 meters long for the 3 motors so the overall length is around 140-150 meters.
I'm not sure how well the grounding of the cable shield was performed.
The first suggestion I see in Delta manual is to put a line reactor on the input in order to reduce harmonics and I think they definitely need to put reactors on the outputs to the motors as well. The last solution that I would like to avoid is to install a transformer just for the supply of the ac drive.
What do you think?
The motor cables are shielded and grounded both at the motors as well the drive sides but they are really really long. The cables are 30, 40 and 70 meters long for the 3 motors so the overall length is around 140-150 meters.
I'm not sure how well the grounding of the cable shield was performed.
The first suggestion I see in Delta manual is to put a line reactor on the input in order to reduce harmonics and I think they definitely need to put reactors on the outputs to the motors as well. The last solution that I would like to avoid is to install a transformer just for the supply of the ac drive.
What do you think?