Siemens SIRIUS M200D Manual page 50

Functions
3.7 System monitoring
Blocking protection principle in run-up phase:
The figure below shows the principle of blocking protection during the run-up phase, that is,
the interaction of blocking current and blocking time:
Figure 3-6
Blocking protection principle after run-up
After run-up, blocking protection behaves as follows during continuous operation:
● The blocking time is reduced to 1 s regardless of the parameterized value.
● The blocking current is limited to a maximum of 400%.
With a parameterized blocking current < 400%, the parameter value is valid.
● When the blocking protection responds, the motor starter itself generates a trip command.
● The messages "Tripping due to motor blocking" and "Group fault" are generated.
● The maximum pointer "Number of motor overload trips" is incremented by 1.
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Blocking protection principle
M200D PROFIBUS/PROFINET
Manual, 08/2014, A5E01577426A/RS-AA/004