SIRIUS 3RV2 motor starter protectors
4.10 Technical data
SIRIUS Innovations
462 System Manual, 01/2011, A8E56203870002-03
4.10.11 Short-circuit breaking capacity
4.10.11.1 Short-circuit breaking capacity for motor starter protectors
Short-circuit breaking capacity I
cu
, I
cs
acc. to IEC 60947-2
The table lists the rated ultimate short-circuit breaking capacity I
cu
and the rated service
short-circuit breaking capacity I
cs
for 3RV2 motor starter protectors at different operating
voltages dependent on the rated current In of the protectors.
Power can be fed in to the motor starter protectors via the terminals at the top or at the
bottom without restricting the rated data. If the short-circuit current at the installation location
exceeds the motor starter protector's specified rated service short-circuit breaking capacity,
you will need to use a backup fuse. It is also possible to install an upstream motor starter
protector with a limiter function.
The maximum rated current of this backup fuse is indicated in the tables. The rated ultimate
short-circuit breaking capacity then applies as specified on the fuse.
Table 4- 32 Short-circuit breaking capacity I
CU
, I
CS
acc. to IEC 60947-2 - Part 1
Up to 240 V AC Up to 400 V/415 V AC
Motor starter
protector
Rated current
I
n
Icu Ics Max. fuse (gL/gG) Icu Ics Max. fuse (gL/gG)
Type A kA kA A kA kA A
Size S00
0.16 ... 1.25 100 100 - 100 100 -
1.6 100 100 - 100 100 -
2 100 100 - 100 100 -
2.5 100 100 - 100 100 -
3.2 100 100 - 100 100 -
4 100 100 - 100 100 -
5 100 100 - 100 100 -
6.3 100 100 - 100 100 -
8 100 100 - 100 100 -
10 100 100 - 100 100 -
12.5 100 100 - 100 100 -
3RV2.1
16 100 100 - 55 30 100
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