text: <s>[INST] AB Powerflex 70 from Australia on African power supply Summary: Would a VFD rated for 415 - 480V run on 380V?Hello forum, I have a client that recently imported a Powerflex 70 VFD from Australia. The unit start and runs for about 30 seconds (runs well btw) and after that shuts down due to low voltage fault. I see in the manual it mentions under File E, Drive Memory Group, item 202: [Voltage Class]Configures the drive current rating and associates it with the selected voltage(for example, 400V or 480V). This parameter is normally used when downloading parameter sets. Would this setting allow the VFD to run on our 380? Is this even possible? Or is the only option a step up transformer? The installation is a plane ride and 6 hours drive away, so visiting the site is not a quick affair. Thanks in advance, Hein [/INST] It would help to know the drive part number. If this drive was purchased in Australia, it was PROBABLY a part number beginning 20ACxx. This means parameter 202 was already set for low voltage (400V). If the part number was 20ADxx then parameter 202 was set to high voltage (480V). low voltage fault - do you mean Fault 4 - undervoltage? Regardless of the parameter 202 setting, the bus voltage will give an undervoltage fault when the DC bus voltage falls below 407V in standard control, 300V in enhanced control. See page 82 of the users manual: https://literature.rockwellautomation.com/idc/groups/literature/documents/um/20a-um001_-en-p.pdf You can have your end user monitor parameter 226 (see page 55): bus volts at time of last fault. We need more information to help you: What is the drive part number What is the value of parameter 202 What is the line in voltage Does line voltage sag when this drive turns on What is the line voltage source (underpowered generator?) Is this an old drive with standard controls or does it have enhanced controls What is the motor name plate data What is the load What is the exact fault code the end user gets If the VFD is configured with parameter 202 set to low voltage, then yes, the drive should be able to run on 380VAC. Is it possible they are single-phasing the drive? \\n </s>