Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive - Air-Cooled (A Frame) - Manual (Page 288)

5-46
Component Definition and Maintenance
7000A-RM001A-EN-P – January 2011 7000 “A” Frame
The DC Link maintains a ripple-free current between the rectifier and the
inverter.
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 current transformer. 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.
The DC link reactor does not normally require service. In the event of its
replacement, it must be ensured that Rockwell Automation approves the
replacement link.
The link has been constructed to ensure that it is cooled by air drawn
through its coils.
To service the DC link, see Figure 5. 36 .
W A R N I N G W A R N I N G The DC Link may be hot!
1. Ensure that source power to the drive is locked out and that the filter
caps are fully discharged.
2. Access to the DC link is gained by opening the door to the DC link
cabinet and removing screws that retain the vertical sheet metal
barrier and low voltage panel in front of the DC link. Swing the low
voltage panel to the left and disassemble the closing barriers located
on the left and right-hand side of the panel by removing the nuts and
washers which secure them to the sides of the structure.
Note: In some instances, depending on the size of the DC link, it may
be necessary to completely remove the low voltage panel from the
drive cabinet. This can be accomplished by lifting the panel off its
hinges and shifting or rotating it to a position where it does not
obstruct the opening to the DC link cabinet. Ensure that equipment
used to lift and support the panel during DC link replacement is
adequate for this purpose.
3. Disconnect the 4 power connections. The DC link is equipped with
flexible power leads.
4. Disconnect wires at terminal block on DC link for thermal switch.
5. Remove the hardware that secures the DC link.
6. Disconnect the ground connection.
DC Link Reactor
Replacement