Configuration
4.2 Supply possibilities in main circuit
SIRIUS 3RA6 Compact Starter
32 System Manual, 02/2008, GWA 4NEB 560 0601-02 DS 02
Conductor cross-sections I
d,max
Recommendation regarding upstream
short-circuit protection device
(53 kA/400 VAC)
Short-circuit protection for
- Left infeed, 25/35 mm² screw terminal with three slots, outgoing terminals with screw-type
connection technology, incl. PE bar (3RA6812-8AB)
- Left infeed, 50/70 mm² screw terminal with three slots, outgoing terminals with screw-type
connection technology, incl. PE bar (3RA6813-8AB)
- Left infeed, 25/35 mm² screw terminal with three slots, outgoing terminals with spring-loaded
connection technology, incl. PE bar (3RA6812-8AC)
- Left infeed, 50/70 mm² screw terminal with three slots, outgoing terminals with spring-loaded
connection technology, incl. PE bar (3RA6813-8AC)
- - 3RV1041-4MA10
NH gL/gG 3NA3; 315 A
Table 4-4 Short-circuit protection for terminal block (3RV1917-5D)
Conductor cross-sections I
d,max
for downstream short-circuit protection device
Short-circuit protection for terminal block (3RV1917-5D)
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
On the 45 mm adapter for the infeed system for 3RA6 only S0 circuit breakers with a rated
ultimate short-circuit breaking capacity I
CU
< 53 kA at 400 V (I
max
= 12.5 A) may be mounted.
If the short-circuit current at the installation point exceeds the circuit breaker's specified rated
ultimate short-circuit breaking capacity, then you will need to use a backup fuse.
WARNING
Short-circuit hazard!
Unless the cables running from the terminal block to the downstream short-circuit protection
device are laid in a short-circuit proof manner, there is a risk of damage to the system.
Make sure that the cables running from the terminal block to the downstream short-circuit
protection device are laid in a short-circuit proof manner (IEC / EN 60439-1
Section 7.5.5.1).
To Next Page
Loading...
Need help?
General
