CAUTION
Severe injury as a result of pyrotechnic activation of the bypass
The bypass is equipped with pyrotechnic activation. Improper maintenance and repairs on the
bypass can result in severe physical injury.
● It is forbidden to carry out any maintenance or repair on the bypass.
● A defective bypass must only be replaced by qualified, trained specialist personnel.
● The bypass must not be dismantled.
See also
Bypass disposal (Page 144)
Required tools
● Standard set of tools with screwdrivers, screw wrenches, socket wrenches, etc.
● Torque wrench
● 600 mm extension for socket wrenches
Interconnecting the power cells
All power cells have an identical design. On the inside of the door, there is a layout diagram
showing how to interconnect the power cells.
All power cells have one equipment code. The installation location can be determined by the
equipment codes entered in the layout diagram.
Removing a power cell
Proceed as follows to remove a defective power cell:
1. Check that the power cells are in a no-voltage condition at the "A" terminals of the power cell
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 power cell.
3. Remove the locking rings ② at the water couplings. Remove the two water hoses ①,
including the couplings, at the front of the power cell.
4. Remove all screws (M8 x 20) of the busbars ⑦ of the power cells 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.
Maintenance
9.7 Repair
SINAMICS PERFECT HARMONY GH150 6SL38253AE412AA1-Z
Operating Instructions Rev.201910281231 EXAMPLE 123
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