Rockwell Automation PF700 PowerFlex 700 Drive Components Replacement - Frame 9 - Manual (Page 81)

Rockwell Automation Publication 20B-IN025B-EN-P - January 2011 81
Component Replacement Procedures Chapter 3
3. Using a 3- or 4-inch paint roller or putty knife, apply a thin, even coating of
the supplied thermal grease to the mounting surface of each SCR module
and Diode.
The SCR (on the left) has a plug with prongs located at the bottom. The Diode
(on the right) has a plug without prongs located at the top.
4. Install the SCR module or Diode with supplied screws and torque using
the sequences and specifications shown in the diagram below.
5. Install the busbars, all wires, and the DC cables.
6. Torque DC cable screws to 12.2 N•m (108 lb•in).
7. Reassemble remaining components in reverse order.
8. Replace all safety shields and enclosure covers before applying power to the
drive.
WARNING: In the next step, be sure to properly install the
modules as shown. If you install the SCR incorrectly, it will not
work. If you install the Diode incorrectly, then the Drive and the
Bus Capacitors may not operate properly and may prematurely fail.
IMPORTANT In the next step, take care to not disturb any of the thermal grease on
the SCR module.
SCR Diode
Plug
with Prongs
Plug with
No Prongs
➊ ➌
➍ ➋ ➌
➍ ➋
➊
First Torque
Sequence:
0.7 N•m (6.0 lb•in)
Final Torque
Sequence:
5.6 N•m (50 lb•in)