1)
If two different conductor cross-sections are connected to one clamping
point, both cross-sections must lie in the range specified. If identical cross-
sections are used, this restriction does not apply.
Type SIRIUS 3RA2 Motor Starters
Connection type
Screw terminals Spring-type terminals
Conductor cross-sections for main conductors
Size S00
Motor starter protectors, contactors Motor starter protectors, contactors
Terminal screw
M3, Pozidriv size 2 --
Operating devices mm
! 5 ... 6 3.0 x 0.5 and 3.5 x 0.5
Prescribed tightening torque Nm
0.8 ... 1.2 --
Conductor cross-sections (min./max.),
1 or 2 conductors can be connected
• Solid and stranded mm
2
2 x (0.5 … 1.5)
1)
only for contactors,
mm
2
2 x (0.75 ... 2.5)
1)
, 2 x (0.5 ... 4)
mm
2
max. 2 x 4
• Finely stranded without end sleeve mm
2
-- 2 x (0.5 ... 2.5)
• Finely stranded with end sleeves (DIN 46 228 T1) mm
2
2 x (0.5 ... 1.5)
1)
. 2 x (0.5 ... 2.5)
mm
2
2 x (0.75 ... 2.5)
1)
• AWG cables, solid or stranded AWG 2 x (20 … 16)
1)
only for contactors,
AWG 2 x (18 ... 14)
1)
, 2 x (20 ... 12)
AWG
2 x 12
Max. external diameter of the conductor insulation mm -- 3.6
Conductor cross-sections for main conductors
Size S0
Motor starter protectors, contactors Motor starter protectors, contactors
Terminal screw
M4, Pozidriv size 2 --
Operating devices mm
! 5 ... 6 3.0 x 0.5 and 3.5 x 0.5
Prescribed tightening torque Nm
2.0 ... 2.5 --
Conductor cross-sections (min./max.),
1 or 2 conductors can be connected
• Solid and stranded mm
2
2 x (1.0 ... 2.5)
1)
, 2 x (1.0 ... 10)
mm
2
2 x (2.5 ... 10)
1)
• Finely stranded without end sleeve mm
2
-- 2 x (1.0 ... 6.0)
• Finely stranded with end sleeves (DIN 46 228 T1) mm
2
2 x (1.0 ... 2.5)
1)
, 2 x (1.0 ... 6.0)
mm
2
2 x (2.5 ... 6)
1)
mm
2
max. 1 x 10
• AWG cables, solid or stranded AWG 2 x (16 ... 12)
1)
, 2 x (18 ... 8)
AWG
2 x (14 ... 8)
1)
Max. external diameter of the conductor insulation mm -- 3.6
Conductor cross-sections for auxiliary
conductors, Size S00/S0
Contactors (basic unit),
motor starter protectors (accessories),
contactors (mountable accessories),
overload relays
Contactors S00 Contactors S0,
motor starter protec-
tors (accessories),
contactors
(accessories),
overload relays
Terminal screw
M3, Pozidriv size 2 --
Operating devices mm
! 5 ... 6 3.0 x 0.5 and 3.5 x 0.5
Prescribed tightening torque Nm
0.8 ... 1.2 --
Conductor cross-sections (min./max.),
1 or 2 conductors can be connected
• Solid and stranded mm
2
2 x (0.5 ... 1.5)
1)
, 2 x (0.5 ... 4) 2 x (0.5 ... 2.5)
mm
2
2 x (0.75 ... 2.5)
1)
,
mm
2
max. 2 x 4 only for contactors S00
• Finely stranded without end sleeve mm
2
-- 2 x (0.5 ... 2.5) 2 x (0.5 ... 1.5)
• Finely stranded with end sleeve mm
2
2 x (0.5 ... 1.5)
1)
, 2 x (0.5 ... 2.5) 2 x (0.5 ... 1.5)
mm
2
2 x (0.75 ... 2.5)
1)
• AWG cables, solid or stranded AWG 2 x (20 ... 16)
1)
, 2 x (20 ... 12) 2 x (20 ... 14)
AWG
2 x (18 ... 14)
1)
,
AWG 2 x 12 only for contactors S00
Max. external diameter of the conductor insulation mm -- 3.6 3.6
© Siemens AG 2011
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