Rockwell Automation Allen-Bradley PowerFlex 700, Installation Instructions Manual

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Rockwell Automation Publication 20B-IN017B-EN-P - September 2011 39
Component Replacement Procedures Chapter 3
7. For all Snubber Boards, remove the U-Phase Motor Bus Bar to gain
access to the board being replaced.
a. Remove the top nut at the U-Phase output terminal block.
b. If not already removed, disconnect the U-Phase Current Transducer
at its top end.
c. Slide the Motor Bus Bar out of the notch at the top.
d. Slide the bar out of the enclosure if possible, or at least down and
out of the way. To do so, move the top end of the bar to the right and
the bottom end of the bar to the left, pull down on a angle, then
rotate the bar 180° and fully remove the bar.
8. For the W-Phase Snubber Board, follow the sub-steps in Step 7. above to
remove the V-Phase Motor Bus Bar.
9. Use needle-nose pliers to remove the wire at J1 from Snubber Board to
be replaced.
10. Remove the ten (10) T30 hex screws that secure the Snubber Board.
Remove the board and discard.
Install Components
1. Install the new Snubber Board with the J1 terminal lug towards the right
side of the drive. Torque screws to 5.6 N•m (50 lb•in) Reconnect wire at
J1.
2. Reposition any Motor Bus Bars that were removed, but do Not tighten
screws at this time.
3. Position the CT assembly and bus bar into place. Tighten its three
screws and torque to 1.6 N•m (14 lb•in) Use a colored marker or torque
seal to mark each screw after torquing so you know when all are done
and to indicate signs of any tampering.
4. Torque screws for any Motor Bus Bars that were removed to 9.0 N•m
(80 lb•in)
5. Reassemble remaining components in reverse order.
6. Replace all safety shields and enclosure covers before applying power to
the drive.
TIP
Depending on spacing, it may be required that all three CTs
and Bus Bars be removed before the U Phase Bus Bar can be
removed.