adccommunitymod (AutomationDirect) asked a question.
Inverter Output reactor
Created Date: January 05,2016
Created By: Tiger
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I am having trouble with an GS3 4040 inverter that runs a water pump 240 feet down in a well. The inverter report a ground fault. When I tested with another motor at the side of the inverter, it runs fine. Using a AC line reactor at the output of the inverter will solve these problem? Where do I install the reactor, as close as possible to the inverter? Or to the motor?
Created Date: January 05,2016
Created by: boardmaker
Most Load Reactors I 've seen are installed typically next to the vfd.
However, it seems you may have an actual ground fault issue. I think you may need further investigation before you try to resolve this with a reactor. Sounds like one of your motor lines may have an insulation issue or possibly a faulty motor.
Created Date: January 05,2016
Created by: scott.lawrence
have you put a megger on the motor feed?
as boardmaker said, the issue could be the pump motor itelf...
Created Date: January 06,2016
Created by: Cow
I'm with Scott on this one. The first step would be to pull the leads off the VFD and meg them down to the motor.
Created Date: January 06,2016
Created by: Tiger
We already checked the wires to the motor and it is having like 4 meters of THHN cable connected to a submerge cable. The connections seems a little damaged so we are going to change the cable for a RHW cable and make new connections. We run the motor with these connections outside from the well and the problem disappear. So probably these connections make the inverter to send a ground fault alarm.
Thanks everybody for your help
Regards
Jaime
Created Date: January 18,2016
Created by: Tiger
Output Line reactor overheat
I have a 50 HP, 460 V Inverter driving a 40 Hp submersible water pump that stop working and provided a Ground fault error. The ground fault disappear by replacing the first 25 feets of cable, but the length of the cable to the motor is more than 75 feet and reading the manual, you should install an AC line reactor at the output. The distance to the motor is near 200 feet and we installed the reactor. But it gets too hot. Very hot! It is normal? The input AC reactor is hot but not too hot.
Created Date: January 05,2016
Created by: Tiger
I am having trouble with an GS3 4040 inverter that runs a water pump 240 feet down in a well. The inverter report a ground fault. When I tested with another motor at the side of the inverter, it runs fine.
Using a AC line reactor at the output of the inverter will solve these problem? Where do I install the reactor, as close as possible to the inverter? Or to the motor?