Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) User Manual
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Rockwell Automation Publication 7000-UM151E-EN-P - January 2013
Chapter 3 Component Definition and Maintenance
11. Apply a thin layer of electrical joint compound (Alcoa EJC No.2 or
approved equivalent) to the contact faces of the new SCRs. The
recommended procedure is to apply the compound to the pole faces using
a small brush and then gently wiping the pole face with an industrial wipe
so that a thin film remains. Examine the pole face before proceeding to
ensure that no brush bristles remain.
12. While grounded, use a long Phillips screwdriver to remove the 2 screws
that hold the SCR SPGDB to the metal bracket on the red glastic
assembly. Retain the hardware.
13. Pull the 4 plastic clips that secure the SCR SPGDB to the glastic assembly.
Retain the hardware.
14. Install the new SCR SPGDB in the assembly with the 4 plastic clips and
use the screws to secure the board to the metal bracket.
15. Clean the heatsink with a soft cloth and rubbing alcohol.
16. Slide the SCR and SPGDB back into place until the mounting bracket
makes contact with the heatsink. Use the Phillips screwdriver to tighten
the assembly to the heatsink.
17. Reapply the clamping load as described in
.
18. Connect the control power cable and the fiber optic cables, ensuring that
you do not exceed the bend radius.
Figure 39 - SCR and SPGDB assembly
IMPORTANT Too much joint compound may result in contamination of other surfaces
leading to system damage.