Siemens SINAMICS SM150

Attaching the grounding spider
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Figure 9-2 Example: Attaching the grounding spider
9.2.2 Grounding using a make-proof grounding switch
The drive is equipped with a make-proof grounding switch (in compliance with the requirements
of IEC61800-5-1, Section 4.2.13).
You can close the make-proof grounding switch when the doors are closed and only at a
voltage below 60 V. If the auxiliary voltage fails completely, the make-proof grounding switch
cannot be closed. It is not permissible that you open the doors before the make-proof grounding
switch is closed.
WARNING
DC-link short-circuit
A DC-link short-circuit can occur if grounding under voltage. This can cause injury and
material damage.
Remove the socket wrench before switching on. This activates the interlocking.
Maintenance
9.2 Grounding the system
SINAMICS SM150 6SL3845-7NN46-7AA0
Operating Instructions 04/2017 159