Removing a double submodule
To remove a defective double submodule, proceed as follows:
1. Check that the double submodule is in a no-voltage condition at the "A" terminals of the
double submodule as well as the "B" connections of the capacitor bank. The "B" connections
of the capacitor bank are located behind the bypass.
2. Remove the fiber-optic cable ⑤ at the front of the double submodule.
3. Remove the locking rings ② at the water couplings. Remove the two water hoses ①,
including the couplings, at the front of the double submodule.
4. Remove all screws (M8 x 20) of the busbars ⑦ of the double submodule that you want to
remove. Remove the two busbars.
5. Remove all screws ③ (M5 x 16) of the upper retaining strip.
6. Remove the screws ④ (M4 x 16) from the bypass.
7. Remove the upper retaining strip.
8. Withdraw the bypass ⑥ a little. Pull the connection cable at the rear of the bypass. Pull
the bypass out completely.
Image 9-6 Removing the double submodule, steps 1 to 7
9. Remove the two screws (M5 x 25) ⑧ between the heat sink and the housing of the capacitor
bank.
10.Remove all screws (M8 x 20) ⑨ between the capacitor busbar and the gating unit.
Maintenance
9.7 Repair
SINAMICS SM120 6SL38855?B
110 Operating Instructions 12/2015
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