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Maintenance
9.5 Repair
9.5.9
Replacing the current transformer
The current transformer may only be replaced by technicians trained by Siemens.
9.5.10
Door interlock system
Contact Technical Support (Page 175) if the door interlock system becomes defective.
9.5.11
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.
168
WARNING
supply.
①
.
②
.
③
.
Operating Instructions Rev.201908010908 EXAMPLE
SINAMICS SM150 6SL3845-2NN41-8AD0
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