304sparky
Member
- Location
- West Virginia
- Occupation
- Electrician
We have an Allen Bradley Powerflex 525 running a motor on a large saw. Roughly at the same depth of the bundle of metal beams that it cuts, the motor stops. All voltage is lost going to the motor. It takes about one minute to get a fault.
Is this normal to take that long to get a fault? It’s getting a F007 fault (OL fault). FLA on the motor is 12.2 amps, however running amps is typically around 5 amps. Motor OL is set to 7 amps. Current limit is set to 10 amps. However, even when current exceeds the current limit, it does not fault.
To my understanding, current limit is a hard number and once current reaches that number, it faults. Also to my understanding, motor OL is a softer number, once the number is reached, there is a time delay before a fault.
We have 4 identical saws and this is the only one we have this issue with.
Should it take one minute to show a fault?
Why does it not fault when the current limit is met?
Is this normal to take that long to get a fault? It’s getting a F007 fault (OL fault). FLA on the motor is 12.2 amps, however running amps is typically around 5 amps. Motor OL is set to 7 amps. Current limit is set to 10 amps. However, even when current exceeds the current limit, it does not fault.
To my understanding, current limit is a hard number and once current reaches that number, it faults. Also to my understanding, motor OL is a softer number, once the number is reached, there is a time delay before a fault.
We have 4 identical saws and this is the only one we have this issue with.
Should it take one minute to show a fault?
Why does it not fault when the current limit is met?
