Regen Drives

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cpt3908

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Yreka, California, United States
I need to install a GFI unit on our new PDC that serves our tray line with a 2000a feed. We currently run about 800 total Hp of regenerative Drives on this line. Does anyone know if the regeneration drives will produce nuisance trips on the GFI?
 
cpt3908 said:
I need to install a GFI unit on our new PDC that serves our tray line with a 2000a feed. We currently run about 800 total Hp of regenerative Drives on this line. Does anyone know if the regeneration drives will produce nuisance trips on the GFI?
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Some large circuit breakers with GF detection on them are known to have issues with spurious tripping for various reasons.

I do not see why a regen drive would cause a properly functioning GF detector to spuriously trip in general.

Perhaps if you had a specific part number of a breaker in mind it would be possible to give you better answers.
 
Thank you. We are still in the design phase of this project and have not specified any parts yet. The question was raised if we needed the GFI or not and whether it would cause problems with the regen drives. I don't have a lot of experience with the regeneration side of the drive and could not give a detailed answer. I didn't think there was an issue as long as we were clear from phase to earth ground.
 
What exactly do you mean by "regen drives"? AC, DC?

Assuming you mean AC Line Regen drives (as opposed to AC Common DC Bus regen drives, or 4 quadrant DC drives) then what is the intended purpose of the GF protection in the breaker? Because if the GFP is for just the drive circuits, there would be no need since the 99% of all AC VF drives will have equipment ground fault protection for the motor circuits. built-in. The exception to that would be if the breaker was for service entrance, because all SE breakers >/= 1000A must have GFP.
 
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