SIEMENS
7/95
Siemens IC 10 · 2017
Overload Relays
SIRIUS 3RB3 Electronic Overload Relays
3RB30, 3RB31 for standard applications
7
1)
If two different conductor cross-sections are connected to one clamping
point, both cross-sections must be in the range specified.
2)
Cable lug and busbar connection possible after removing the box
terminals.
3)
If bars larger than 12 mm x 10 mm are connected, a 3RT2946-4EA2 cover
is needed to maintain the required phase clearance,
see page 7/101
.
4)
When conductors larger than 25 mm
2
are connected, the 3RT2946-4EA2
cover is needed to maintain the required phase clearance,
see
page 7/101
.
Conductor cross-sections of main circuit
Connection type
Screw terminals
Screw
terminals
with box
terminal
Terminal screw
M3, Pozidriv size 2
M4, Pozidriv size 2
4 mm Allen screw
Operating devices
mm
5 ... 6
5 ... 6
4 mm Allen screw
Prescribed tightening torque
Nm
0.8 ... 1.2
2 ... 2.5
4.5 ... 6
Conductor cross-sections (min./max.),
1 or 2 conductors can be connected
• Solid or stranded
mm
2
2 x (0.5 ... 1.5)
1)
,
2 x (0.75 ... 2.5)
1)
,
2 x (0.5 ... 4)
1)
2 x (1 ... 2.5)
1)
,
2 x (2.5 ... 10)
1)
1 x (1 ... 50)
1)
,
2 x (1 ... 35)
1)
2 x (2.5 ... 16)
1)
,
2 x (10 ... 50)
1)
,
1 x (10 ... 70)
1)
• Finely stranded with end sleeve (DIN 46228-1)
mm
2
2 x (0.5 ... 1.5)
1)
,
2 x (0.75 ... 2.5)
1)
2 x (1 ... 2.5)
1)
,
2 x (2.5 ... 6)
1)
,
max.. 1 x 10
2 x (1 ... 25)
1)
,
1 x (1 ... 35)
1)
2 x (2.5 ... 35)
1)
,
1 x (2.5 ... 50)
1)
• AWG cables, solid or stranded
AWG
2 x (20 ... 16)
1)
,
2 x (18 ... 14)
1)
,
2 x 12
2 x (16 ... 12)
1)
,
2 x (14 ... 8)
1)
2 x (18 ... 2)
1)
,
1 x (18 ... 1)
1)
2 x (10 ... 1/0)
1)
,
1 x (10 ... 2/0)
1)
Removable box terminals
2)
• With copper bars
3)
mm
--
--
--
2 x 12 x 4
• With cable lugs
4)
-
Terminal screw
--
--
--
M6
-
Prescribed tightening torque
Nm
--
--
--
4.5 ... 6
-
Usable ring terminal lugs
mm
--
--
--
d
2
= min. 6.3
d
3
= max. 19
Connection type
Spring-type terminals
Operating devices
mm
3.0 x 0.5 and 3.5 x 0.5
Conductor cross-sections (min./max.),
1 conductor can be connected
• Solid or stranded
mm
2
1 x (0.5 ... 4)
1 x (1 ... 10)
--
• Finely stranded without end sleeve
mm
2
1 x (0.5 ... 2.5)
1 x (1 ... 6)
--
• Finely stranded with end sleeve (DIN 46228-1)
mm
2
1 x (0.5 ... 2.5)
1 x (1 ... 6)
--
• AWG cables, solid or stranded
AWG
1 x (20 ... 12)
1 x (18 ... 8)
--
Connection type
Straight-through transformers
Diameter of opening
mm
--
15
18
Type
3RB3016, 3RB3113
3RB3026, 3RB3123
3RB3036, 3RB3133
3RB3046, 3RB3143
Size
S00
S0
S2
S3
d
2
d
3
I201_12740
© Siemens AG 2016