The circuit breaker may trip when power is supplied due to:

The circuit breaker has a current rating that is too low:

• Short circuit between phases of the power supply or a ground fault in the power supply.
• The rectifier bridge is damaged, causing a short circuit between phases.
• Power supply cables are in contact.
• The power supply cables from the circuit breaker to the VFD are too long, causing excessive leakage current..

Possible solutions:

• Replace the appropriate circuit breaker with a suitable one
• Isolate and rectify the power supply cables to address the short circuit issue
• Shorten the distance of the power supply cables from the circuit breaker to the VFD or add a reactor to mitigate leakage current
• Contact the supplier for assistance

Make sure to check the power supply and the rectifier bridge of the VFD and reach out to the supplier for the best support.