Schneider Atv 630 SCF1 and SCF3 Fault

1. Is this a new installation?

2. How long has it been in operation?

3. What and when did you set the ground fault levels to for SCF3

4. Are you using shielded wire for your motor leads?

5. The fault will show up with the motor leads disconnected. Do you still have the fault?

I wouldn’t replace the drive just yet. If the motor and cable check out, I’d disconnect the motor from the ATV630 and see if it still throws SCF1/SCF3. If it does with nothing connected to the output, I’d start suspecting the drive itself.
Also check the insulation to ground with a proper megger, not just a regular meter. I’ve seen cables and motors look fine on a basic resistance check and still cause a fault. The timing of the fault matters too, whether it happens at power-up or when you give it a run command can tell you a lot.

The sparse information does not even indicate if a valid fault has been cleared. GA

SCF1 – Motor Short Circuit / Phase-to-Phase Fault

• shorted motor winding or damaged insulation
• shorted motor cable
• damaged power transistors (IGBT)
• outdated motor firmware (should be v1.6IE15 or higher)

SCF3 – Ground Short Circuit / Earth Fault

• earth/ground fault in cables or inside motor
• long motor runs (exceeds 50 meters)
• unbalanced mains supply

regards,

Vulcan