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Inverter power module (igbt) – Rockwell Automation 20B PowerFlex 700 Drive - Frame 7 Components Replacement User Manual

Page 42

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42

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

Chapter 3 Component Replacement Procedures

Inverter Power Module
(IGBT)

Important: Kit includes two (2) IGBT modules and two (2) Gate Interface

Boards. It is recommended that both IGBT modules for a phase be
replaced at the same time.

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 Inverter Power Module to be replaced.

3. Perform

Remove Transitional Bus Bar on page 23

.

4. Perform

Remove Components on page 38

for the Inverter Snubber

Board over the IGBT modules to be replaced, but do not discard the
Inverter Snubber Board.

5. Remove the two Inverter Snubber brackets (two screws each) for each

board. Set aside.

6. Disconnect the positive and negative IGBT bus bars (four T40 screws

each).

7. Using a pencil, mark the sides of the IGBT Bus Bar to note location for

later installation.

Exact positioning is critical for alignment of other components,
especially the Transitional Bus Bar unit.

8. Remove the IGBT Bus Bar from the modules. Set aside.

9. Disconnect connections for the Gate Interface Boards.

Inverter Snubber Brackets