Note
If an incorrect phase sequence was connected during the cable installation and it cannot be
corrected by a subsequent swapping of the motor cables, you have two possibilities:
● Change the phase sequence by entering a negative setpoint.
● Change the phase sequence with the drive parameterization.
Note
Interconnect the windings for motors that can be operated in star-delta correctly. To do this,
read the motor documentation. Observe the required isolation voltage for the operation of the
drive.
6.5.5 Connecting ground
DANGER
Insufficient grounding
The drive must be grounded to ensure that it operates safely and reliably. If the drive is
operated with insufficient grounding, then the protection and monitoring functions can fail.
Death, serious injury, or material damage will result.
To ensure the correct functioning of the protection and monitoring equipment, ground the
device.
Each cabinet has a grounding lug for grounding the components installed in the cabinet. It is
located at the bottom of the cabinet. Connect the cabinets securely to the plant grounding
system via these grounding lugs.
Figure 6-6 Grounding lug
Electrical connection
6.5 Connection
SINAMICS SM150 6SL3845-7NN46-7AA0
116 Operating Instructions 04/2017
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