Application planning
4.1 General data
SIRIUS 3RA6 compact starter
System Manual, 09/2014, NEB560060102000/RS-AA/006
27
Operating motors with high motor starting currents
Compact starters with a current setting range from 3 to 12 A are suitable for starting current
factors up to 8.5 times the rated motor current, while compact starters with a current setting
range from 8 to 32 A are suitable for starting current factors up to 9 times the rated motor
current.
If motors are operated that have a higher starting current, refer to the following table for the
maximum adjustable motor current:
Max. motor starting current,
as a multiple of I
e
(I
e
at 40 °C)
Maximum settable motor current
Current setting range
3 to 12 A
Current setting range
8 to 32 A
≤ 8 times I
e
12
32
8.5 times I
e
12
32
9 times I
e
11,3
32
9.5 times I
e
10,7
30,3
10 times I
e
10,2
28,8
Note
No restrictions need to be observed in the case of compact starters with smaller current
setting ranges.
Compact starters with the current setting range from 8 to 32 A can be used as an alternative
to compact starters with the current setting range from 3 to 12 A.
Short-circuit protection
The rated service short-circuit breaking capacity I
CS
of the compact starter is 53 kA at 400 V.
The rated service short-circuit breaking capacity I
CSIT
of the compact starter in IT systems is
1.5 kA up to 690 V.
Combining compact starters with SIRIUS circuit breakers
The compact starters' terminals are compatible with SIRIUS 3RV size S0 circuit
breakers/motor starter protectors.
You will find further information on the compact starters' terminals in "Technical data
(Page 245)".
Distance from neighboring components
For additional information on clearances to the neighboring components, please refer
to "Minimum distances from neighboring components (dimensions in mm) (Page 269)".
