The safety concept encompasses safety components and functions to protect the device and
operators. The device is also equipped with monitoring functions to protect external
components.
The device operates safely when the interlock and protection systems are functioning properly.
Nevertheless, there are areas that are hazardous for personnel and that cause material
damage if the safety information of all the instructions and the labels on the device are not
strictly complied with.
3.2.1
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.
3.2.2
Protection and monitoring functions of internal components
The internal components of the converter have the following protection and monitoring
functions:
● Converter protection based on monitoring systems:
– Current monitoring
– Output voltage monitoring
– Indirect thermal monitoring of the DC link reactor
– 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
● Anti-condensation heating
Description
3.2 Safety concept
SINAMICS GL150 6SL38502UM114PA0Z
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Operating Instructions Rev.201910281441 EXAMPLE
