Siemens SIRIUS 3RH Series, System Manual

Page: 254 / 786

SIRIUS 3RT2 contactors/contactor assemblies
2.8 Technical data
SIRIUS Innovations
254
System Manual, 01/2011, A8E56203870002-03
2.8.1.12 Conductor cross-sections - 3RT202. contactors
Table 2- 91 Conductor cross-sections - 3RT202. contactors
Type 3RT20 23 3RT20 24 3RT20 25 3RT20 26 3RT20 27 3RT20 28
Size S0
Conductor cross-sections (1-wire or 2-wire connection possible)
Main conductor
Screw connection
Conductor cross-section

Solid + stranded
mm
2
2 x (1 to 2.5)
1)
; 2 x (2.5 to 10)
1)
acc. to IEC 60947

Finely stranded with end sleeve mm
2
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 (16 to 12); 2 x (14 to 8)
 Connection screws
M4 (Pozidriv size PZ 2)
- Tightening torque Nm
(lb.in.)
2 to 2.5 (18 to 22 lb.in.)
Auxiliary conductor
Conductor cross-section

Solid + stranded
mm
2
2 x (0.5 to 1.5)
1)
; 2 x (0.75 to 2.5)
1)
acc. to IEC 60947

Finely stranded with end sleeve mm
2
2 x (0.5 to 1.5)
1)
; 2 x (0.75 to 2.5)
1)

Solid or stranded AWG (2 x)
AWG 2 x (20 to 16)
1)
; 2 x (18 to 14)
1)
 Connection screws
M3
- Tightening torque Nm
(lb.in.)
0.8 to 1.2 (7 to 10.3 lb.in.)
Main conductor Spring-loaded connection
Conductor cross-section

Solid + stranded
mm
2
2 x (1 to 10)

Finely stranded with end sleeve mm
2
2 x (1 to 6)

Finely stranded without end
sleeve
mm
2
2 x (1 to 6)

AWG cables, solid or stranded
AWG 2 x (18 to 8)
Auxiliary conductor
Conductor cross-section
 Solid + stranded
mm 2 2 x (0.5 to 2.5)
 Finely stranded with end sleeve mm
2
2 x (0.5 to 1.5)

Finely stranded without end
sleeve
mm
2
2 x (0.5 to 1.5)

AWG cables, solid or stranded
AWG 2 x (20 to 14)