Rockwell Automation 20B PowerFlex 700 Drive Components Replacement - Frame 8 - Manual (Page 33)

Rockwell Automation Publication 20B-IN024C-EN-P - June 2012 33
Basic Component Removal Procedures Chapter 2
6. Reinstall the screws for the four side standoffs and brackets to secure the
transitional busbar assembly to the chassis.
a. Torque the screws to 5.6 N•m (50 lb•in) to secure the brackets to the
four red glastic spacers.
b. Torque screws to 2.9 N•m (26 lb•in) to secure the two brackets to the
drive chassis.
7. Torque the six setscrews for each IGBT board to 5.6 N•m (50 lb•in).
8. Reinstall the tie down capacitor mount on each IGBT board.
Reinstall two screws simultaneously to secure each Mount. Torque screws
to 2.9 N•m (26 lb•in).
9. Install three snubber resistors onto the six setscrews for each IGBT board.
Reinstall two screws to secure each snubber resistor against the tie down
capacitor mount. Torque screws to 5.6 N•m (50 lb•in).
10. Torque the nuts that secure the nine negative flexible capacitor busbars to
the transitional busbar to 5.6 N•m (50 lb•in).
11. Torque the nuts that secure the transitional bus bar to the bus capacitor
setscrews to 5.6 N•m (50 lb•in).
12. Connect the yellow wire for the balancing resistor.
13. Install a new tie wrap for the balancing resistor wiring.
14. If present, connect the +DC IN and +DC OUT cables from the
transitional busbar. Torque to 23.5 N•m (208 lb•in).
15. For AC input drives, reinstall the DC choke output cables. Torque to
9 N•m (80 lb•in).
16. Reinstall any customer wiring to the transitional busbar.
17. Reinstall the stacking panel as instructed on page
27 .
18. Verify all wiring to the two panels and the transitional busbar has been
reconnected.
19. Replace all safety shields and enclosure covers before applying power to the
drive.
IMPORTANT
When torquing down each setscrew, place a flathead screwdriver
against the side of the flexible capacitor busbar to minimize twisting.
Do not
rest the screwdriver against any IGBT board while performing
this task to avoid cracking or breaking the board.