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 following external components for the safety concept are provided:
● 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
● Device protection using 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
● Shutdown in the event of semiconductor failure
● Shutdown in the event of control component failure
Description
3.2 Safety concept
SINAMICS SM150 6SL3845-2NN41-8AD2
28 Operating Instructions Rev.201910281310 EXAMPLE
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