Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) Commissioning - ForGe Control - Manual (Page 31)

Rockwell Automation Publication 7000-IN012B-EN-P - June 2014 31
Commissioning the Drive Chapter 4
Refer to local safety guidelines for detailed procedures on how to safely isolate the
equipment from hazards.
Only open the door to the medium voltage cabinets after you successfully
complete the lockout and tagout.
Step Down Transformer Fusing
The drive uses transformers to step down medium voltage to low voltage. With
all sources of power removed from the drive (Medium Voltage and Control
Power), remove the step down transformer fuses from the fuse clips and place
them in a safe place outside of the drive cabinet. Removing the control power
fuses will prevent a separate source of control power from being stepped up to
Medium Voltage in the event that the safety interlocks fail to function.
Fuse and O/L Protection
While referencing the electrical diagrams, locate all fuses and overload relays
within the drive line-up. Verify that all installed fuses and overload are the same as
indicated by Rockwell Automation. Fuses and overload settings are also identified
by stickers located on the cabinet structure in close proximity to the fuse or
overload. Ensure the settings match the rating identified on the sticker.
Replacement fuses have been shipped with the drive in the event that a fuse opens
during commissioning.
Installation Review Prior to commencing the commissioning of the drive line-up it, Rockwell
Automation recommends re-inspecting the equipment installation. Identifying
errors in the drive installation prior to commencing the commissioning rather
than mid way through the process greatly reduces the time required to
commission the drive line-up.
ATTENTION: Live capacitors in circuit. Before touching anything, ensure that
the drive is isolated from medium voltage and wait five minutes for the
capacitors to discharge. Test the circuit for potential before servicing the
equipment. Failure to do so can result in severe injury or death.
ATTENTION: Ensure that the motor is not spinning due to a driven load. A
spinning motor can generate a high potential into the drive’s motor filter
capacitors, which can result in severe injury or death.