Siemens Sinamics SM150 6SL3845-2NN41-8AD0, Operating And Installation Instructions

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Connecting the motor to the dv/dt filter
Figure 3-11 Connecting the motor to the dv/dt filter
3.6.13 Motor-side grounding switch (option L49)
Under the following circumstances, operating modes can occur for which there is the danger
that the motor returns power to the drive:
● Operating mode / variant of the load machine, e.g. drive group with gas turbine
● Type of drive machine, e.g. permanently excited motor
resulting in hazardous voltages.
When the make-proof grounding switch is closed, this option allows motor-driven make-proof
grounding switches that ground the motor-side output voltage to be controlled automatically.
The motor-driven make-proof grounding switches are installed in an additional cabinet.
For safety reasons, the open-loop control system locks the make-proof grounding switch so
that they cannot be closed while voltage is still present. The control is integrated into the
protection and monitoring circuit.
Observe the notes regarding the grounding switch provided in Chapter "Safety instructions
(Page 16)" and "Maintenance (Page 137)". Carefully comply with the 5 safety rules (Page 15).
Description
3.6 Description of options
SINAMICS SM150 6SL3845-2NN41-8AD0
Operating Instructions Rev.201908010908 EXAMPLE
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