Tripping Classes - Siemens SIRIUS 3RT Series System Manual

4.4.1.1

Tripping classes

3RV20/3RV21 motor starter protectors conform to CLASS 10 according to IEC 60947-4-1.
The tripping times according to IEC 60947-4-1 are as follows:
Table 4- 3
Tripping class
CLASS 10 A
CLASS 10
CLASS 20
CLASS 30
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
Tripping times dependent upon tripping classes according to standard IEC 60947-4-1
SIRIUS 3RV2 motor starter protectors
Tripping time t in s at
A
7.2 x I from cold
e
2 < t ≤ 10
A
4 < t ≤ 10
A
6 < t ≤ 20
A
9 < t ≤ 30
A
4.4 Functions
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