russrmartin
Member
Hey guys,
I currently have 2 Powerflex 70 drives that are running 2 2HP motors. We will be replacing the current machine with another machine which has 3/4 HP fan motors, and we will use the existing drives to run them. My question is, do I need to resize the GFSC protection that is upstream of the drive? This breaker I assume is also the protection for the motor leads as well as the drive. I have never done this for a motor that was running off a drive before. I'm used to just grabbing the data out of 430-150 and sizing the breaker. I'm just unsure of how the VFD plays into the equation. Right now, for the 2 HP motors we are using an AB 140M-C2E-B40. I am thinking that I need to replace these with the -B25. Thanks in advance.
Russ
I currently have 2 Powerflex 70 drives that are running 2 2HP motors. We will be replacing the current machine with another machine which has 3/4 HP fan motors, and we will use the existing drives to run them. My question is, do I need to resize the GFSC protection that is upstream of the drive? This breaker I assume is also the protection for the motor leads as well as the drive. I have never done this for a motor that was running off a drive before. I'm used to just grabbing the data out of 430-150 and sizing the breaker. I'm just unsure of how the VFD plays into the equation. Right now, for the 2 HP motors we are using an AB 140M-C2E-B40. I am thinking that I need to replace these with the -B25. Thanks in advance.
Russ
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