Replacing The Precharging Transformer - Siemens SINAMICS SM150 Operating Instructions Manual

9.5.10

Replacing the precharging transformer

Danger to life as a result of incorrect replacing the precharging transformer
Replacing the precharging transformer incorrectly can result in death, serious injury, or
material damage.
● Follow "the five safety rules (Page 15)".
● Before replacing the precharging transformer, open the safety disconnector for the 400 V
● Lift the transformer carefully because it is heavy (> 45 kg).
Removing the precharging transformer
1. Detach the 400 V connecting cables
2. Remove the high-voltage cables
3. Release the PE conductor.
4. Remove the fixing screws on the base brackets
5. Remove the transformer.
Figure 9-21
SINAMICS SM150 6SL3845-7NN42-2AA3 HBIS Shigang WRM NTM
Operating Instructions Rev.202003051222 3005356504
WARNING
supply.
Example: Replacing the precharging transformer
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Maintenance
9.5 Repair
149