Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 327)

Component Definition and Maintenance 6-37
7000 “B” Frame 7000-UM150I-EN-P – June 2013
Apply a thin bead of Loctite 454 adhesive to the PowerCage surface
in a zigzag pattern using the original nozzle size. Use the tip to spread
the adhesive around to cover at least 50% of the area. There should
be sufficient quantity of adhesive to remain wet long enough for the
gasket to be applied. The adhesive uses the moisture in the air as it
cures. The higher the humidity the faster the adhesive will cure.
I M P O R T A N T I M P O R T A N T This adhesive will bond anything quickly,
including fingers!
Position the gaskets ensuring the gasket is oriented correctly. The
gasket should be centered over the opening for the heatsinks with the
narrow end positioned closest to the test points. The porous surface
of the gasket should be applied to the PowerCage. The gasket will
bond almost immediately. Apply some pressure to the gasket for
15-30 seconds.
After all the gaskets have been placed check to see that the gasket
has bonded properly. Repair any loose areas.
PowerCage Removal
1. Ensure there is no power to the equipment.
A T T E N T I O N A T T E N T I O N To prevent electrical shock, ensure the main
power has been disconnected before working on
the sensing board. Verify that all circuits are
voltage free using a hot stick or appropriate
voltage-measuring device. Failure to do so may
result in injury or death.
2. Before removing the PowerCage, all the components located
within the PowerCage need to be removed to avoid any damage
to the components. Consult the required sections to remove
clamping pressure, as well as remove the SGCT or SCR, circuit
boards, and thermal sensor.
A T T E N T I O N A T T E N T I O N The SGCT and SCR can be destroyed or damaged
by static charges. Personnel must be properly
grounded before removing circuit boards from the
PowerCage. Use of damaged circuit boards may
also damage related components. A grounding
wrist strap is recommended for handling.