SIEMENS
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Siemens IC 10 · 2017
Load Feeders and Motor Starters for Use in the Control Cabinet
SIRIUS 3RA6 Compact Starters
Infeed system for 3RA6
8
Terminal blocks
Using the terminal block the three phases can be fed out of
the system; this means that single-phase, two-phase and
three-phase components can also be integrated in the system.
After the end cover is pulled out, the terminal block can be
plugged onto an expansion module.
Expansion plug for SIRIUS 3RV29 infeed systems
After the end cover is pulled out, the expansion plug for the
SIRIUS 3RV29 infeed system can be plugged onto an expansion
module. It connects the infeed system for 3RA6 compact
starters with the SIRIUS 3RV29 infeed system.
Maximum rated operational current
The following maximum rated operational currents apply for the
components of the infeed system for 3RA6:
With side-by-side mounting of several expansion modules, the
maximum rated operational current from the second expansion
module to the end of the row is 63 A.
Proposal for upstream short-circuit protection devices
The following short-circuit data apply for the components of the
infeed system for 3RA6 compact starters:
1)
To prevent the possibility of short circuits, the cables on the terminal block
must be installed so that they are short-circuit proof.
Component
Maximum rated
operational current
A
Screw-type infeed 50/70 mm²
100
Screw-type infeed 25/35 mm²
63
Spring-loaded infeed 25/35 mm²
63
Expansion plug
63
Conduc-
tor
cross-
section
Maximum let-through current
I
d, max
and current integral
I
2
t
Proposal for
upstream short-circuit
protection device
mm²
Short-circuit protection for 3RA681.-8A.
screw-type infeed (25/35 mm² and 50/70 mm²)
2.5 … 35,
2.5 … 70
I
d, max
< 21 kA,
I
²
t
= 530 kA²s
3RV1041-4MA10
(NH gG 3NA3; 315 A)
Short-circuit protection for spring-loaded
infeed 25/35 mm
2
, 3RA6830-5AC
4
I
d, max
< 9.5 kA,
I
²
t
= 85 kA²s
3RV1021-4DA10
6
I
d, max
< 12.5 kA,
I
²
t
= 140 kA²s
3RV1031-4EA10
10
I
d, max
< 15 kA,
I
²
t
= 180 kA²s
3RV1031-4HA10
16/25
I
d, max
< 19 kA,
I
²
t
= 440 kA²s
3RV1041-4JA10
35
I
d, max
< 21 kA,
I
²
t
= 530 kA²s
3RV1041-4MA10
(NH gG 3NA3; 315 A)
Short-circuit protection for terminal block,
3RV2917-5D
1.5
I
d, max
< 7.5 kA
5SY...
2.5
I
d, max
< 9.5 kA
1)
4
I
d, max
< 9.5 kA
6
I
d, max
< 12.5 kA
© Siemens AG 2016