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Converter snubber board - ac input only – Rockwell Automation 20B PowerFlex 700 Drive - Frame 7 Components Replacement User Manual

Page 50

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Rockwell Automation Publication 20B-IN017B-EN-P - September 2011

Chapter 3 Component Replacement Procedures

Converter Snubber Board - AC
Input Only

Refer to the figures in

Component Diagrams and Torque Specs on page 13

for

these instructions.

Remove Components

1. Read and follow the

Safety Precautions on page 9

and

Important Initial

Steps on page 11

.

2. Locate the Converter Snubber Board to be replaced. (Some wires below

shown disconnected.)

3. Perform

Remove Main Control Panel Assembly on page 21

.

4. Perform

Remove Stacking Panel on page 22

.

5. Perform

Remove Precharge Board Assembly on page 23

.

6. For the T-Phase Converter Snubber Board, if the U-Phase Motor Bus

Bar must be removed for space considerations, then

If space allows, remove the U-Phase Current Transducer and then
disconnect both ends of the U Phase Motor Bus Bar and remove it
to gain access to the Converter Snubber Board.

Otherwise if space does

not allow, using the instructions in

Step 2.

Step 5.

in

Component Replacement Procedures on

page 25

, remove all three Current Transducer assemblies and move

them to a safe location, but do not disassemble them.

7. Label and disconnect any push-on wire connector from the Converter

Snubber Board to be replaced.

8. Remove the two (2) T30 screws that secure the board. Remove the

board and discard.

Install Components

1. Install the new Snubber Board. Torque screws to 2.9 N•m (26 lb•in)

2. Reconnect all wires.

3. If removed, reinstall the U Phase Motor Bus Bar and torque screws to

9.0 N•m (80 lb•in)

4. Reassemble remaining components in reverse order.

5. Replace all safety shields and enclosure covers before applying power to

the drive.

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