Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 326)

6-36 Component Definition and Maintenance
7000-UM150I-EN-P – June 2013 7000 “B” Frame
PowerCage Gasket
To ensure all air movement is through the slots of the heatsinks, all
possible air leaks have been sealed with a rubber gasket. This gasket
is placed between the surface of the PowerCage and heatsink
module. It is necessary to have the gasket in place to ensure proper
cooling of the SGCTs or SCRs are maintained.
Power Connection
Gasket
Power Connection
PowerCage Housing
Resistors
Power Connection
Gasket
Power Connection
PowerCage Housing
Resistors
Figure 6.24 – PowerCage Gasket Location
Replacement of PowerCage Gaskets
The gaskets do not normally require replacement, but in the event
that they become damaged, they may require replacement.
Removal of old Gasket Material
Pull all the material possible off by hand. Scrape off as much
material as possible with a sharp knife. Do not score the PowerCage
with the knife. All the material will not come off! Remove as much
as possible to leave an even surface to bond to. Clean away any loose
pieces of gasket. Then proceed with installation of the gasket.
The PowerCage must be cleaned with Spray Nine (another all
purpose household cleaner could be used). Do not spray onto the
PowerCage as it promotes electrical tracking. Apply the cleaner to a
paper towel and wipe the surface of the PowerCage where the gasket
will be applied. Liberally spray the surface with distilled water.
Wipe the surface with a clean paper towel.