Marcus (Customer) asked a question.

November 5, 2023 at 1:24 AM
I am getting an over-currency/interference fault code on some cheap 2 hp VFD’s (for XY&Z) every time I start up my 20 hp motor with a DURAPULSE GS20?

I bought some cheap Vevor brand VFD‘s for the 2 hp XY and Z axis movement. They worked correctly, but would occasionally overcurrent/interference fault just sitting idle, but energized, in the cabinet.

 

my new 20 hp saw blade motor arrived a few days ago with a Durapulse GS 20 drive. I installed it in the cabinet and every single time I start the 20 hp motor with the drive it faults-out two of the cheap 2hp Vevor drives wiith an over current/interference fault

 

these other drives are only energized and never actually running a motor when they fault.

 

I am returning them to Amazon bc i suspect they are just junk and ordered GS20drives to replace them that will be here in a few days. I am a novice in this field, and I am anxious that even the new drives will fault out. I am behind sched already.

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  • ADC Community_02 (Automationdirect.com)

    When your AC drive faults out when another larger drive starts, it could be due to a variety of reasons. AC drives are sensitive to electrical disturbances and can be affected by the power quality and electromagnetic interference. Here are some common issues and troubleshooting steps to consider:

    1. Overcurrent Protection: AC drives have overcurrent protection features that can trip if they detect excessive current. Check if the starting of the larger drive is causing a sudden inrush of current that exceeds the AC drive's capacity. Adjust the current limits on the AC drive if necessary.
    2. Grounding and Shielding: Poor grounding and inadequate shielding can lead to electromagnetic interference (EMI) affecting the AC drive. Make sure the AC drive is properly grounded and that the control and power cables are adequately shielded.
    3. Interference and Noise: Large motors starting can create electrical noise and interference that may affect the AC drive's control circuitry. Use line filters and noise suppression techniques to mitigate these effects.
    4. Isolation: Consider isolating the AC drive or implementing a soft-start or soft-stop feature to reduce the impact of sudden changes in the electrical system.

     

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