Siemens SINAMICS PERFECT HARMONY GH150

5. Loosen the four screws ① that fix the current transformer to the busbar.
6. Loosen the screw ⑤ and the three screws ⑥ that connect the busbar to the fixing plate.
When doing so, keep a firm grip on the busbar to ensure it does not fall.
7. Pull the busbar out to the front.
When doing so, be aware of the cables connected to the second current transformer.
8. Remove the current transformer from the bottom.
Installing the current transformer
To install the current transformer, proceed as follows:
1. Carry out the removal steps in reverse order.
2. Screw the screws into the busbars with a tightening torque of 25 Nm.
3. After installing the current transformer, check that it works properly.
9.7.5 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).
Installing the precharging transformer
1. Remove the paint from at least one screw position on the base brackets. This is where the
transformer will be grounded.
2. Install the new transformer in the reverse order to when you removed it. Comply with the
specified torque of the fastening screws. When attaching the connecting cables ensure that
the cables do not twist.
3. Check that the precharger is working correctly.
Maintenance
9.7 Repair
SINAMICS PERFECT HARMONY GH150 6SL38253AE412AA1-Z
120 Operating Instructions Rev.201910281231 EXAMPLE