Precharge scr module - dc input only – Rockwell Automation 20B PowerFlex 700 Drive - Frame 7 Components Replacement User Manual
Page 57
Rockwell Automation Publication 20B-IN017B-EN-P - September 2011
57
Component Replacement Procedures Chapter 3
Install Components
1. Replace washers on Snubber Board Bus Bar studs.
2. Replace insulation over washers.
3. Place new Snubber Board over insulation.
4. Install M6 nuts on studs with star washer side facing Snubber Board. Do
not tighten yet.
5. Center insulation around washers so it is not pinched between the Bus
Bar and any washer or nut.
6. Torque M6 nuts to 2.9 N•m (26 lb•in)
7. Replace push-on wire.
8. Reassemble remaining components in reverse order.
9. Replace all safety shields and enclosure covers before applying power to
the drive.
Precharge SCR Module - DC
Input Only
Refer to the figures in
Component Diagrams and Torque Specs on page 13
and
Figure 5 - on page 56
for these instructions.
Remove Components
1. Read and follow the
and
.
2. Locate the Precharge SCR module to be replaced.
Remove Main Control Panel Assembly on page 21
Remove Stacking Panel on page 22
5. Label and remove power cables (DC+ and DC–) and all connected
wires from the SCR module.
6. Remove the entire Snubber Board Bus Bar assembly, including its lead
wires, and carefully set assembly aside.
7. Remove the SCR module and discard.