Siemens SIRIUS 3RT Series System Manual page 389

The operating current increases by approx. 40% in the case of direct voltage.
t
I
①
②
Figure 4-2
The characteristic curve reproduced above for the motor starter protector relates to a specific
setting range. It is, however, also valid as a schematic circuit diagram for motor starter
protectors with other current ranges.
Reference
Time-current characteristics, current-limiting characteristics, and I
requested on the Internet (http://www.siemens.com/automation/service&support) via
"Technical Assistance".
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
Opening time
Current
3-pole load CLASS 10
2-pole load CLASS 10
Schematic circuit diagram of the time-current characteristic curve for 3RV20
SIRIUS 3RV2 motor starter protectors
1
2
4.4 Functions
t characteristics can be
2
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