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Maintenance
9.7 Repair
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
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 13)".
● Before replacing the precharging transformer, open the safety disconnector for the 400 V
● The transformer is heavy, therefore lift it carefully:
Installing the precharging transformer
1. Remove the paint from at least one screw position on the base brackets. This is where the
2. Install the new transformer in the reverse order to when you removed it. Comply with the
3. Check that the precharger is working correctly.
108
WARNING
supply.
– Version with 10 kV and 13.8 kV: 50 kg
– Version with 6.9 kV and 4.16 kV: 35 kg
transformer will be grounded.
specified torque (Page 104) of the fastening screws. When attaching the connecting cables
ensure that the cables do not twist.
SINAMICS PERFECT HARMONY GH150 6SL3826
Operating Instructions 05/2020
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