mylespetro
Member
Hey everyone,
Posting this for my boss who's onsite installing a replacement PowerFlex 700 after another one failed yesterday. Looks like one of the original IGBT modules fried on the original drive, and notably the common mode capacitor/MOV jumpers were NOT removed on the original drive, whereas every other drive I've ever worked on at this site (power plant) has required all common mode cap/MOV jumpers to be removed because of an ungrounded delta secondary system.
They removed the original drive and put in the new drive - refurbished by Rockwell - new drive has the same catalog number aside from the enclosure, original was NEMA 12, replacement is NEMA 1, which shouldn't be an issue because the originals were inside enclosures in a relatively clean/dry air conditioned room. When they got all the power and I/O connections moved over to the new drive, they turned the supply power on and the green "POWER" LED did not come on. They checked voltage on all 3 phases (600VAC) and measured ~600VAC phase to phase and 347VAC phase to ground on all three phases.
Short of an actual bad drive, is there anything else that could cause this? Connections knocked loose in shipping etc.? I would really hope that Rockwell would have tested that the drive powers up after refurbishment, but I've seen stranger (stupider) things.
Thanks!
EDIT: Should have added that they did remove the capacitor/MOV jumpers on the new drive, and the original drive was only in service for just over 5 years (installed in July 2017).
Posting this for my boss who's onsite installing a replacement PowerFlex 700 after another one failed yesterday. Looks like one of the original IGBT modules fried on the original drive, and notably the common mode capacitor/MOV jumpers were NOT removed on the original drive, whereas every other drive I've ever worked on at this site (power plant) has required all common mode cap/MOV jumpers to be removed because of an ungrounded delta secondary system.
They removed the original drive and put in the new drive - refurbished by Rockwell - new drive has the same catalog number aside from the enclosure, original was NEMA 12, replacement is NEMA 1, which shouldn't be an issue because the originals were inside enclosures in a relatively clean/dry air conditioned room. When they got all the power and I/O connections moved over to the new drive, they turned the supply power on and the green "POWER" LED did not come on. They checked voltage on all 3 phases (600VAC) and measured ~600VAC phase to phase and 347VAC phase to ground on all three phases.
Short of an actual bad drive, is there anything else that could cause this? Connections knocked loose in shipping etc.? I would really hope that Rockwell would have tested that the drive powers up after refurbishment, but I've seen stranger (stupider) things.
Thanks!
EDIT: Should have added that they did remove the capacitor/MOV jumpers on the new drive, and the original drive was only in service for just over 5 years (installed in July 2017).