Installing the precharging transformer
1. Remove the paint from at least one screw position on the base brackets. This is where the
transformer will be grounded.
2. Install the new transformer in the reverse order to when you removed it. Comply with the
specified torque (Page 162) of the fastening screws. When attaching the connecting cables
ensure that the cables do not twist.
3. Check that the precharger is working correctly.
9.5.12
Replacing the precharging rectifier
Removing modules
Figure 9-14
Replacing the precharging rectifier
1. Loosen the two plastic screws
①
in the cover.
2. Remove all connecting leads. If necessary, remove the cable ties.
Note
Noting the core markings
The cables are equipped with Faston connectors. Make a note of the core markings. When
installing the new module, note the core markings for the cables.
3. Unfasten the five plastic screws
②
and remove the module.
Maintenance
9.5 Repair
SINAMICS SM150 6SL3815-7NP41-0AA1
174
Operating Instructions Rev.201910281301 EXAMPLE