Siemens SIRIUS 3RH Series - Tripping Classes

SIRIUS 3RV2 motor starter protectors
4.4 Functions
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
387
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 times dependent upon tripping classes according to standard IEC 60947-4-1
Tripping class Tripping time t
A
in s at
7.2 x I
e
from cold
CLASS 10 A 2 < t
A
≤ 10
CLASS 10 4 < t
A
≤ 10
CLASS 20 6 < t
A
≤ 20
CLASS 30 9 < t
A
≤ 30