Siemens SIMATIC ET 200SP Manual page 57

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 3-16
Motor starter (3RK1308-0**00-0CP0)
Manual, 12/2016, A5E34821005002A/RS-AB/002
Blocking protection principle in run-up phase:
Product overview
3.7 Functions
57