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Maintenance
9.5 Repair
9.5.9
Door interlock system
Contact Technical Support (Page 171) if the door interlock system becomes defective.
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 high-voltage cables
2. Detach the 400 V connecting cables
3. Detach the grounding cable
4. Remove the fixing screws
5. Remove the transformer.
164
WARNING
supply.
①
.
②
.
③
.
④
at the front and rear on the base brackets.
Operating Instructions Rev.201910281406 EXAMPLE
SINAMICS SM150 6SL3810-7NN38-0AA1
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