Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) - Manual (Page 177)

Rockwell Automation Publication 7000-UM151E-EN-P - January 2013 177
Component Definition and Maintenance Chapter 3
Disposal
When disposing of the drive, it should be disassembled and separated into groups
of recyclable material as much as possible (i.e. steel, copper, plastic, wire, etc.).
These materials should then be sent to local recycling facilities. In addition, all
disposal precautions mentioned above must also be taken for those particular
materials.
Preventive Maintenance
Check List
The preventive maintenance activities on the PF7000 Air-Cooled Drive (A-
Frame or B-Frame) can be broken down into two categories:
• Operational Maintenance – can be completed while the drive is running.
• Annual Maintenance – should be completed during scheduled downtime.
Refer to the Tools/Parts/Information Requirements at the end of this section for
a list of documentation and materials needed to properly complete the preventive
maintenance documents.
Operational Maintenance
This process really involves only one task: Changing or Cleaning the Air Filters.
The PF7000 drives require consistent, unrestricted airflow to keep the power
devices cool. The air filter is the main source of blockage in the air path.
The drive will provide an air filter alarm whenever the pressure differential across
the devices drops to a drive-specific level. Referring to the Air Filter Block
parameter, this can be anywhere from 7% to 17% blocked, depending on the
heatsink and device configuration. This may seem like a small number, but it
takes significant blockage to begin to lower the voltage from the pressure sensor.
The percentage is a measure of voltage drop, and should not be viewed as a
percentage of the opening that is covered. They are not related linearly.
Once you receive an Air Filter Warning, you should immediately make plans to
change or clean the filter. You should still have days or weeks until the drive
reaches an Air Filter Fault, but this is dependent on site-specific particle
conditions.
This can be done while the drive is running. Refer to Replacing Air Filters on
page 100 for a detailed description of the process.
Annual Maintenance
These maintenance tasks should be performed on an annual basis. These are
recommended tasks, and depending on the installation conditions and operating
conditions, you may find that the interval can be lengthened. For example, we do
not expect that torqued power connections will require tightening every year.
Due to the critical nature of the applications run on MV drives, the key word is
preventive. Investing approximately 8.0 hours per year on these tasks is time well
spent in adding insurance against unexpected downtime.