Rockwell Automation 7000A PowerFlex Medium Voltage Drive (A-Frame) - Classic Control - Manual (Page 336)

6-32 Component Definition and Maintenance
7000A-UM150F-EN-P –June 2013 7000 “A” Frame
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.
3. Remove the 13-mm bolts in the two flanges that connect the heatsink
to the PowerCage, then remove the heatsink from the PowerCage.
This will reduce the weight of the PowerCage making it easier to
handle.
4. To detach the PowerCage itself, the bolts on the outer flange need to
be removed. Carefully lift the PowerCage down, placing the forward
face down. Do not overtorque these bolts when replacing the
PowerCage.
I M P O R T A N T I M P O R T A N T The PowerCage can be heavy and it is preferred
that two people should extract the PowerCage
from the drive to prevent injury or damage to the
module.
5. Refer to appropriate section for component replacement.
6. When replacing the PowerCage, it is important to place the bolts on
the outer flange in loosely. Torque bolts alternately on one flange and
then the opposite flange to ensure even tightening of the module. A
suggested sequence for torquing PowerCage bolts is shown in Figure
6.24.