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Can I connect my ATV6xx / ATV9xx series drive to a resistive grounded 3 phase power supply without using external ground fault detection equipment?

Published date: 31 October 2018

Issue:
ATV6XX or 9xx drive will be used on a resistive grounded 3 phase power supply.  Can the GRFL parameter be set to a low percentage instead of using an external ground fault detection device?

Product Line:
ATV6XX and ATV9XX series drives.

Environment:
All models, All serial numbers, Resistive grounded 3 phase power supplied to the drive.

Cause:
Information in current literature is vague.

Resolution:
No.  Regardless of the GRFL setting, the drive will need to have an external ground fault detection device employeed.   In all cases verify that the installation meets or exceeds applicable Electrical code.

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