Rockwell Automation 20P PowerFlex DC Drive - Frame B SCR Modules - Manual (Page 17)

PowerFlex® DC Drive - Frame B SCR Modules 17
Step 6: Install the New
SCR Modules Install the new SCR Modules in reverse order of removal as detailed in Step
5:
Remove the Existing SCR Modules on page 11 .
Important Notes for installation:
•
Thermal grease must be applied to the bottom of each SCR Module
before securing it to the heatsink.
•
Use the following table to determine the proper tightening torque for the
SCR Modules installed on the heatsink:
•
Use the following orientation for installing the SCR Modules:
•
Use the following table to determine the proper tightening torque for the
bus bars connected to the SCR Modules:
230V AC Input 460V AC Input
Part Number Final Torque Part Number Final Torque
SK-20P-S7F48 2.5…4 N•m (22…35.4 lb•in) SK-20P-S7F78 2.5…4 N•m (22…35.4 lb•in)
SK-20P-S7F49 4.5…5.5 N•m (40…48.7 lb•in) SK-20P-S7F79 4.5…5.5 N•m (40…48.7 lb•in)
SK-20P-S7F42 4.5…5.5 N•m (40…48.7 lb•in) SK-20P-S7F41 4.5…5.5 N•m (40…48.7 lb•in)
SK-20P-S727F 4.5…5.5 N•m (40…48.7 lb•in) SK-20P-S737F 4.5…5.5 N•m (40…48.7 lb•in)
230V AC Input 460V AC Input
Part Number Final Torque Part Number Final Torque
SK-20P-S7F48 4.5…5.5 N•m (40…48.7 lb•in) SK-20P-S7F78 4.5…5.5 N•m (40…48.7 lb•in)
SK-20P-S7F49 4.5…5.5 N•m (40…48.7 lb•in) SK-20P-S7F79 4.5…5.5 N•m (40…48.7 lb•in)
SK-20P-S7F42 11…13 N•m (97.4…115 lb•in) SK-20P-S7F41 11…13 N•m (97.4…115 lb•in)
SK-20P-S727F 11…13 N•m (97.4…115 lb•in) SK-20P-S737F 11…13 N•m (97.4…115 lb•in)
1
2
3 2
1
3
Gate leads at top
Gate leads at bottom
This SCR Module
only present in
regenerative drives.