Rockwell Automation 20B PowerFlex 700 Drive Components Replacement - Frame 8 - Manual (Page 52)

52 Rockwell Automation Publication 20B-IN024C-EN-P - June 2012
Chapter 3 Component Replacement Procedures
3. Install the transitional busbar assembly. See
page 32 .
Only torque nuts and screws after all components are in place.
4. Install the three supplied negative flexible capacitor busbars in positions 1,
3, and 5 on the IGBT.
The negative flexible capacitor busbars have a higher angle.
5. Install the tie down capacitor mount:
a. Insert the short ends of the six threaded studs with nuts through the
flexible capacitor busbars and into the left side of the IGBT. Torque to
5.6 N•m (50 lb•in).
b. Install the tie down capacitor mount with the two screws previously
removed from the top and bottom of the capacitor mount. Torque to
2.9 N•m (26 lb•in).
6. Install the AC output busbar, output busbar, and current transducer:
a. Secure the AC output busbar to the two standoffs using the two nuts
previously removed. Torque nuts to 5.6 N•m (50 lb•in).
b. Secure the AC output busbar to the IGBT by inserting six screws into
the IGBT. Torque screws to 5.6 N•m (50 lb•in).
c. If removed, insert the output busbar through the current transducer
assembly with the large end to the right.
d. Secure the current transducer assembly (transducer and brackets) using
the two screws that were removed with the assembly. Torque to 2.9
N•m (26 lb•in).
e. Secure the left end of the output busbar to the AC output busbar with
one screw. Torque to 9.0 N•m (80 lb•in).
f. Secure the other end of the output busbar to the U, V, or W busbar with
the setscrew and nut. Torque the nut to 5.6 N•m (50 lb•in).
g. Install the two screws that connect the output busbar to the U, V, or W
busbar. Torque to 9.0 N•m (80 lb•in).
7. Install the gate interface board:
a. Install the gate interface board using the four nuts removed previously.
Torque screws to 2.9 N•m (26 lb•in).
b. Install the supplied Gate Interconnect Harness.
c. Connect wiring between the IGBT and gate interface board as shown
in Gate Interface Board on page 53 .
d. Connect wires to the current transducer.
8. Install the three snubber capacitors in the reverse order of the removal
instructions detailed on page 29 . Torque nuts to 5.6 N•m (50 lb•in).
9. Replace all safety shields and enclosure covers before applying power to the
drive.
WARNING:
Correct torque is critical to ensure correct operation
of the drive. Improper torquing could cause premature failure when
attempting to operate the drive.