186 Rockwell Automation Publication 7000L-UM301F-EN-P - March 2020
Chapter 4 Commissioning
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.
Installation Review
Prior to commencing the commissioning of the drive line-up it is recommended
that the installation of the equipment be re-inspected. Identifying errors in the
drive installation prior to commencing the commissioning as opposed to mid way
through the commissioning process will greatly reduce the amount of time
required to commission the drive line-up.
Inspect for Shipping Damage
Prior to continuing verifying the installation of the equipment, open the cabinets
to all equipment supplied by Rockwell Automation and inspect each component
installed for signs of damage. Any damage claim should be made back to the
Medium Voltage Business as soon is it is identified so the damaged components
can be replaced as quickly as possible.
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