Hello, I have recently acquired a 63A soft starter and I am looking to test it with a 0.5 kW motor. I have connected the soft starter to a 3x400V AC power source, with 24 VDC to A1 and A2. When I tried to run the motor by connecting it to A1, it initially accelerated but then stopped after 1 second. The Device LED showed green and the State/Bypassed Failure LED showed red, indicating an "Impermissible Ie/class setting" according to the manual found at https://cache.industry.siemens.com/...4/v3/Manual_softstarter_3RW30_3RW40_en-US.pdf (page 63). Could this issue be related to the size of the motor, incorrect parameter settings, or a malfunctioning soft starter? (Please note that the device LED does show as green in reality)
I believe this soft starter may experience a fault during the startup process due to a small load.
It appears that the CLASS dial is currently set to OFF or beyond its designated range. Try adjusting it to a value of 10. However, there may still be a risk of a fault occurring due to the absence of a load.
Despite setting the class to 10, I encountered the same error. In my pursuit of a solution, I will attempt to source a larger motor for the task at hand.
When determining when to close bypass contacts, most soft starters rely on the current rising to 150-200% of motor amps and then falling back to rated amps. This indicates that the motor has finished accelerating. However, if the motor is undersized, it may never reach this threshold, leading the soft starter to believe that the motor never accelerated.
Hello! It seems like you've done your homework on troubleshooting, so kudos on that. Regarding your problem, it's unlikely that it's due to motor size since a 63A soft starter should easily handle a 0.5 kW motor. To me, it more likely seems like an issue with improper parameter settings. Your soft starter must be correctly programmed based on the motor's specifications. Check the rated motor voltage, rated motor power, rated motor frequency, rated motor current, and rated motor speed - all these parameters should match the motor's nameplate data. Incorrect settings might be causing the "Impermissible Ie/class setting" error. Of course, if after double-checking and adjusting the settings the problem persists, then it might be a fault within the starter itself. When did you get the soft starter? If it's still under warranty, it might be worth it to contact the manufacturer's support. Good luck!
Hey there! By the sound of it, the issue might come down to your parameter settings rather than the size of your motor or potential malfunctioning of the starter. As the red LED indicating "Impermissible Ie/Class Setting" is showing, I'd recommend first double-checking the overload settings and ensuring they match the specifications of your motor (this information should ideally be on its label). Also, it might be worth verifying if your soft starter is correctly set to match your motor type (e.g. squirrel cage, wound rotor, etc.). Give this a try and keep us posted.
It sounds like you’re on the right track, but that red LED indicating an "Impermissible Ie/class setting" typically points to a mismatch between your soft starter’s settings and the motor's parameters. First, double-check that the soft starter is configured correctly for the motor's rated current and operating conditions. Ensure the overload settings and class settings on the starter match your motor’s specifications. Also, consider if the motor may be drawing more current than expected during startup, which some startups can do, especially under load. If everything looks good there, it might be worth testing the soft starter with a different motor to see if the problem persists—this could help rule out any issues with the starter itself. Good luck!
It sounds like you're on the right track, but the "Impermissible Ie/class setting" error often points to a mismatch between the soft starter's configured parameters and the motor's specifications. Double-check the settings for your motor's current rating and ensure they align with what the soft starter can handle. Also, verify that you've entered the correct motor class/category in the soft starter's parameters. Sometimes, a simple oversight, like incorrect wiring or a missed step in the setup, can cause these issues too. If everything appears to be correct but you're still facing problems, it might be worth testing the soft starter with a different motor to rule out any malfunction. Good luck!
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Answer: The error could be related to incorrect parameter settings, the size of the motor being incompatible with the soft starter, or a malfunction in the soft starter itself.
Answer: You can refer to the manual provided by the soft starter manufacturer to check the correct parameter settings, ensure the motor size is compatible with the soft starter, and inspect for any malfunctions in the soft starter.
Answer: The green Device LED and red State/Bypassed Failure LED combination suggests an issue with the permissible current setting (Ie) or class setting on the soft starter, as per the manual reference provided.
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