Siemens SINAMICS SM150

● The electromechanical interlock system for the make-proof grounding switch prevents the
make-proof grounding switch from closing for the voltage DC link. The make-proof
grounding switch can only be closed if the circuit-breaker is open and the DC link has been
completely discharged.
● The EMERGENCY OFF mushroom pushbutton in the cabinet door is a pushbutton with
mechanical interlock system for EMERGENCY OFF, Stop Category 0 (standard).
Note
As option, the make-proof grounding switch also serves to ground the input side (option L48)
and the output side (option L49).
3.2.2 External safety components
The drive has the following external safety components for the safety concept:
● Circuit breaker
More detailed information is provided in Chapter Circuit-breaker (provided by the
customer) (Page 37).
● Input-side transformer
The transformer on the input side must be configured in such a way that the maximum short-
circuit current is not exceeded. Information on this is provided in the technical data sheet
of the transformer.
3.2.3 Protection and monitoring functions of internal components
The internal components of the drive have the following protection and monitoring functions:
● Crowbar
● Drive protection based on monitoring systems:
– Current monitoring
– DC-link monitoring
– Output voltage monitoring
– Thermal monitoring of the power unit
– Precharge monitoring
– Insulation monitoring
– Supply voltage monitoring
– GSV monitoring
– Circuit-breaker monitoring
– Re-cooling unit monitoring
Description
3.2 Safety concept
SINAMICS SM150 6SL3845-7NN46-7AA0
30 Operating Instructions 04/2017