9.5.11 Replacing the precharging transformer
WARNING
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
supply.
● Lift the transformer carefully because it is heavy (> 45 kg).
Removing the precharging transformer
1. Detach the 400 V connecting cables ①.
2. Remove the high-voltage cables ②.
3. Release the PE conductor.
4. Remove the fixing screws on the base brackets ③.
5. Remove the transformer.
Figure 9-26 Example: Replacing the precharging transformer
Maintenance
9.5 Repair
SINAMICS SM150 6SL3845-7NN46-7AA2
Operating Instructions Rev.201910281345 EXAMPLE 167
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