Hello everyone, I am facing an issue with my ABB inverter ACS510 (VFD) that only occurs when a load is applied to the motor. The inverter works perfectly fine without a load or when the motor is connected with no load. However, when a rated load is applied and a power interruption occurs, the motor does not run even though the inverter shows no error upon restarting. I have inspected all SMDs and components and everything seems to be in good condition. Can anyone provide insight into what type of fault this may be? Your assistance is greatly appreciated. Thank you in advance.
Do you open the run command before restarting your computer after a power outage?
If you experience a power outage, make sure to open the run command before restarting your system. This is a common issue that can be easily resolved by adjusting programming options to enable automatic restart after power failure. The default setting typically requires manual intervention, as it prioritizes safety. Make sure to check and modify these settings to streamline the restart process.
If you're troubleshooting an issue, make sure to check parameter 21.08. Turning it to OFF may resolve the issue you are facing.
In troubleshooting VFD issues, DickDV recommended checking parameter 21.08, which should be set to OFF to resolve the problem. The issue at hand involves the nonuke-start or run being latched on the push button, remaining enabled even in the event of a failure. Despite parameter 21.08 already being set to 0=off, the problem persists as the VFD shows an increase in frequency without the motor starting.
Schneider Altivar drives have a useful tCt parameter that, when set to LEL, will automatically restart the motor after a power failure as long as the RUN command remains ON. This eliminates the need to manually open and close the Run command. It is likely that ABB drives also have a similar parameter for this feature.
This sounds like a possible issue with the torque performance of your motor under load conditions. When a load is applied, the current demand on the motor increases, and that's when problems might become apparent, even though everything seems fine while operating without a load. A power interruption under these conditions might render the motor unable to restart as it lacks required 'starting torque'. I'd suggest checking out the motor's performance specifications or the settings on your VFD that manage the applied torque, particularly during startup. It's also worth cross-checking the motor and invertor's rated load compatibility.
From what you're describing, it seems like the issue could be linked with your motor's overload relay, rather than the inverter itself. If the overload relay is misadjusted or defective, it might cut off the motor when the load is high, even though the inverter seems to be operating correctly. You should try to inspect or possibly replace the relay, or consult a technician for further assistance. Depending on the load, you might also consider checking if the motor is properly rated for the application. It's just a suggestion, and I hope it helps!
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Answer: The issue might be related to the behavior of the inverter under load conditions, which could be impacting the motor's operation during power interruptions.
Answer: The fault might be related to a specific component or setting that affects the motor operation under load conditions, even though the inverter itself does not report any errors.
Answer: It is recommended to check the inverter settings, connections, and possible faults in the system to identify the root cause of the issue and take necessary corrective actions.
Answer: Potential faults could include issues with the inverter settings, motor connections, power supply interruptions, or specific components within the inverter system that might be affecting the motor's operation.
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