98 Rockwell Automation Publication 7000-UM202D-EN-P - May 2018
Chapter 2 Power Component Definition and Maintenance
Replacing Heatsinks
The copper heatsinks can weigh about 9 kg (20 lb), while the aluminum
heatsinks will weigh approximately 4 kg (9 lb).
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 93.
3. Completely remove the SGCT or SCR from the heatsink that is being
replaced (see Replacing the SGCT
on page 73 or Replacing SCR and
SCR Self-Powered Gate Driver Boards (SPGDB) on page 90).
4. There are two bolts that secure the heatsink to the PowerCage module.
They are M8 bolts (13 mm socket required), and must 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 module.
6. Install the new heatsink and hand-tighten the bolts.
7. Replace the SGCT or SCR (see Replacing the SGCT
on page 73 or
Replacing SCR and SCR Self-Powered Gate Driver Boards (SPGDB)
on page 90).
8. Follow procedure Uniform Clamping Pressure
on page 92 to ensure the
heatsinks are clamped to a uniform pressure.
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.
ATTENTION: Do NOT remove the pivot plate from the PowerCage. The pivot
plate is located on the opposite end of the PowerCage from the clamp head.
If the pivot plate is removed from the PowerCage, it must be replaced in the
original orientation. See Figure 45
through Figure 50 for pivot plate location.
ATTENTION: If present, remove plastic film from the heatsink before
installation. Failure to remove the film will result in device failure.
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