GE Industrial Solutions AF-600 FP High Power (460V_575V 150HP and above) - Manual (Page 148)

15. Remove the 18 retaining screws (T30) on the IGBT input terminals. Note snubber capacitors come off when screws are removed. There are 6 screws for
each IGBT module.
16. Remove the 2 retaining nuts (8 mm) connecting each IGBT-cap bus bar assembly to the IGBT-Ind bus bar assembly and remove the IGBT-cap bus bar
assembly. There are three IGBT-cap bus bar assemblies.
17. Remove the retaining nut (8 mm) from the high frequency board.
18. Remove the 2 retaining screws (T25) from the high frequency board.
19. Disconnect the wire assembly from the high frequency board and remove the board.
20. If the unit has Brake IGBTs, remove the 4 retaining screws (T30) connecting the IGBT-Ind bus bar assembly to the Brake IGBT. Note that there are 2 screws
per Brake IGBT module.
21. Remove the 4 retaining nuts (13 mm) connecting the IGBT-Ind bus bar assembly to two DC bus bars from the inductor. Remove the IGBT-Ind bus bar
assembly.
22. Remove the 8 retaining screws (T25) mounting each IGBT module.
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Illustration 8.1: IGBT Modules (4 of 4)
1 Snubber capacitor 7 Retaining screw (Step 16)
2 Retaining screw (Brake IGBT option) (Step 20) 8 Retaining screw (Step 15)
3 Retaining nut (Step 17) 9 IGBT-Cap bus bar BB47
4 Retaining nut (Step 21) 10 IGBT board
5 High Frequency board 11 IGBT retaining screw (Step 22)
6 Retaining screw (Step 18)
REASSEMBLY
1. Replace the IGBT modules in accordance with instructions included with the replacement modules.
2. Reassemble in reverse order.
AF-650 GP and AF-600 FP High Power Service Manual
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