Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 175)

4-16 Commissioning
7000-UM150I-EN-P – June 2013 7000 “B” Frame
A T T E N T I O N A T T E N T I O N 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.
Refer to local safety guidelines for detailed procedures on how to
safely isolate the equipment from hazards.
The door to the medium voltage cabinets can only be opened after
the lockout and tagout are successfully completed.
Step Down Transformer Fusing
Transformers are used in the drive 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.