Replacing The Precharging Rectifier - Siemens SINAMICS SM150 Operating Instructions Manual

Maintenance
9.5 Repair
Installing the precharging transformer
1. Remove the paint from at least one screw position on the base brackets. This is where the
2. Install the new transformer in the reverse order to when you removed it. Comply with the
3. Check that the precharger is working correctly.
9.5.11

Replacing the precharging rectifier

Removing modules
①
Figure 9-22
1. Remove all connecting leads. If necessary, remove the cable ties.
2. Remove the five plastic nuts
Installing a module
Install the new module in the reverse order to when you removed it.
150
transformer will be grounded.
specified torque (Page 133) of the fastening screws. When attaching the connecting cables
ensure that the cables do not twist.
Fastening nut
Replacing the precharging rectifier
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.
①
of the module.
SINAMICS SM150 6SL3845-7NN42-2AA3 HBIS Shigang WRM NTM
Operating Instructions Rev.202003051222 3005356504