Siemens SIRIUS 3RF Series

SIRIUS 3RU2/3RB3 overload relays
5.10 Technical data
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
549
5.10.3.3 Conductor cross-sections main circuit
Table 5- 45 Technical data for the main circuit connection, 3RB30/3RB31 overload relays
Type 3RB30 1.,
3RB31 1.
3RB30 2.,
3RB31 2.
Size S00 S0
Width 45 mm 45 mm
Connection type Screw terminals with box terminal
 Connection screw
M3, Pozidriv size 2 M4, Pozidriv size 2
 Operating tool
∅ 5 to 6 ∅ 5 to 6
 Tightening torque
Nm 0.8 to 1.2 2 to 2.5
 Conductor cross-sections (min./max.), 1-wire or 2-wire
- Solid mm
2
2 x (0.5 to 1.5)
1)
; 2 x (0.75 to 2.5)
1)
2 x (0.5 to 4)
1)
2 x (1 to 2.5)
1)
2 x (2.5 to 10)
1)
- Finely stranded with end
sleeve
mm
2
2 x (0.5 to 1.5)
1)
2 x (0.75 to 2.5)
1)
2 x (1 to 2.5)
1)
; 2 x (2.5 to 6)
1)
; max. 1 x 10
- AWG cables, solid or stranded AWG 2 x (20 to 16)
1)
2 x (18 to 14)
1)
2 x 12
1)
2 x (16 to 12)
1)
2 x (14 to 8)
1)
Connection type Spring-loaded connection
 Operating tool
∅ 3.0 x 0.5 and ∅ 3.5 x 0.5
 Conductor cross-sections (min./max.)
- Solid mm
2
1 x (0.5 to 4) 1 x (1 to 10)
- Finely stranded without end
sleeve
mm
2
1 x (0.5 to 2.5) 1 x (1 to 6)
- Finely stranded with end
sleeve (DIN 46228 Part 1)
mm
2
1 x (0.5 to 2.5) 1 x (1 to 6)
- AWG cables, solid or
stranded
AWG 1 x (20 to 12) 1 x (18 to 8)
1)
If two different conductor cross-sections are being connected to one clamping point, both cross-sections must be
located in the range indicated. If identical cross-sections are used, this restriction does not apply.