Application planning
4.3 Supply options (main circuit)
SIRIUS 3RA6 compact starter
System Manual, 09/2014, NEB560060102000/RS-AA/006
33
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 275)".
The installation guidelines for compact starters and circuit breakers/fuseless load feeders
must also be observed along with the associated clearances.
Short-circuit protection for SIRIUS infeed system for 3RA6
The short-circuit protection device that is installed upstream of the infeed system must be
designed in accordance with the table below.
Table 4- 5
Short-circuit protection for left or right infeed, 25/35 mm², with spring-loaded connection
technology (3RA6830-5AC)
Conductor cross-
sections
I
d,max
I²t
Recommendation regarding
upstream short-circuit
protection device
(53 kA/400 VAC)
4 mm
2
≤ 9.5
kA
85 kA
2
s
3RV1021-4DA10
6 mm
2
≤ 12.5
kA
140 kA
2
s
3RV1031-4EA10
10 mm
2
≤ 15
kA
180 kA
2
s
3RV1031-4HA10
16 mm
2
/25 mm
2
≤ 19
kA
440 kA
2
s
3RV1041-4JA10
35 mm²
≤ 21
kA
530 kA²s
3RV1041-4MA10
NH gL/gG 3NA3; 315 A
Short-circuit protection for infeed 3RA681.-8A.
Recommendation regarding upstream short-circuit protection device (53 kA/400 V AC):
3RV1041-4MA10, NH gL/gG 3NA3; 315 A
Table 4- 6
Short-circuit protection for terminal block (3RV2917-5D)
Conductor cross-sections I
d,max
for downstream short-circuit protection device
Short-circuit protection for terminal block (3RV2917-5D)
1.5 mm
2
I
d,max
< 7.5 kA
2.5 mm
2
I
d,max
< 9.5 kA
4 mm
2
I
d,max
< 9.5 kA
6 mm
2
I
d,max
< 12.5 kA