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 Requirements for the circuit breaker
provided by the customer (Page 21).
3.2.3 Protection and monitoring functions of internal components
The internal components of the drive have the following protection and monitoring functions:
● Drive protection based on monitoring systems:
– Current monitoring
– DC link monitoring
– Monitoring the output voltage
– Thermal monitoring of the power unit
– Precharging monitoring
– Supply voltage monitoring
– Insulation monitoring
– Monitoring of the common power supply
– Circuit breaker monitoring
– Re-cooling unit monitoring
● 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
3.2.4 Protection and monitoring functions for external components
Transformer and motor can be monitored in the device. A fast protective shutdown that you can
activate for external problems, e.g. short-circuits, is present.
Description
3.2 Safety concept
SINAMICS SH150 6SL3805
26 Operating Instructions 05/2020
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