3.2.2 Safety information for IEC 61800-5
DANGER
Insufficient grounding
High voltages can still be present even after shutdown. If live parts are touched, this can result
in death or severe injury.
A grounding switch is not installed. The system operator must, therefore, ensure that there is
sufficient grounding.
Ensure sufficient grounding during work on the power unit. Further information on grounding
can be found under "Safety information for maintenance and repairs".
3.2.3 External safety components
The safety concept of the converter is supplemented by the following external components:
● Circuit breaker
You can find more detailed information in the section "Circuit breaker (provided by the
customer)".
● Input-side transformer
When an error is detected, the medium-voltage transformer limits the short-circuit current
and is configured in such a way that the maximum permissible short-circuit current (see the
technical data) is not exceeded.
3.2.4 Protection and monitoring functions of internal components
The internal components have the following protection and monitoring functions:
● Protection based on monitoring systems:
– Current monitoring
– Output voltage monitoring
– Insulation monitoring
– Supply voltage monitoring
– Circuit breaker monitoring
– Monitoring the fans
● Shutdown in the event of semiconductor failure
● Shutdown in the event of control component failure
● Internal protection functions for the control hardware
● Protection against communication failure between the closed-loop control and the power
unit
Description
3.2 Safety concept
SINAMICS SL150 6SL38600UL432AA0Z
26 Operating Instructions Rev.201910281433 EXAMPLE
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