Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) - Manual (Page 64)

64 Rockwell Automation Publication 7000-UM151E-EN-P - January 2013
Chapter 3 Component Definition and Maintenance
Figure 41 - Heatpipe heatsink
The copper heatsinks can weigh about 9kg (20 lbs.), while the aluminum
heatsinks will weigh approximately 4kg (9 lbs.)
1. Isolate and lock out all power to the drive.
2. Remove the load from the clamp head as described in
Checking Clamping
Pressure on page 54 .
3. Completely remove the SGCT or SCR from the heatsink that is being
replaced as described in PowerCage™ on page 49 and following.
4. There are 2 bolts that secure the heatsink to the PowerCage. They are 13-
mm bolts, and should be removed using several extenders to get the socket
wrench out past all the sensitive gate driver boards.
5. Loosen the two bolts and carefully remove the heatsink from the
PowerCage.
6. Install the new heatsink and hand-tighten the bolts.
ATTENTION: To prevent electrical shock, disconnect the main power
before working on the drive. 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.