Rockwell Automation SB3000 High Pwr SB3000 AC Pwr Modules (RCS) - Manual (Page 52)

4-18 SB3000 Power Modules (RCS)
Step 11. Start and finger-tighten the two M6 hex nuts on the negative bus bar. See
figure 4.7, callout 4.
Step 12. Start and finger-tighten the two 5/16” cap screws, flat washers, and lock
washers on the heatsink. One cap screw is located on each side of the
heatsink. See figure 4.7, callout 5.
Step 13. Start and finger-tighten the two M8 bolts on the AC bus bar. See figure 4.7,
callout 3. Tighten the bolts evenly.
Step 14. Loosen the M8 bolt on the left side of the fuse. See figure 4.7, callout 1. This
allows the fuse some movement.
Step 15. Start and finger-tighten the M8 bolt with a lockwasher and a flat washer on
the positive bus bar on the left side of the fuse. See figure 4.7, callout 2.
Note that the fuse ends should be in contact with the left and right bus bars. If
the fuse does not touch the bus bars, adjust the horizontal position of the
IGBT Phase Module Assembly until the fuse ends are contacting the bus
bars. In some cases, the positive bus bar may have to be moved to allow the
fuse to make contact.
Step 16. Pull the fuse forward in the slots. Hold the fuse with its back side parallel to
the middle AC bus bar.
Note that the fuse must be mounted with the label facing forward, e.g., the
top of the label should be to the right. The auxiliary connection tabs on the
fuse endplates should be facing down. Do not install the fuse with the tabs
facing up or toward the rear.
Step 17. Tighten the right and left fuse bolts to 20.5 Nm (15 lb-ft). Be sure the fuse
does not rotate while the bolts are being tightened.
Step 18. Tighten the two M6 hex nuts on the negative bus bar to 5 Nm (45 lb-in). See
figure 4.7, callout 4.
Step 19. Tighten the two M8 bolts on the AC bus bar to 9.5 Nm (84 lb-in). See figure
4.7, callout 3.
Step 20. Tighten the two 5/16” cap screws on the heatsink to 9.5 Nm (84 lb-in). See
figure 4.7, callout 5.
Step 21. Ensure that all nuts and bolts are tightened to the rated torque. Re-torque the
nuts and bolts as necessary.
Step 22. Re-connect the wires, connectors, and harnesses to the IGBT Phase module
assembly that were removed in step 4.
Step 23. Close the cabinet doors.
Step 24. Reapply power to the Power Module.