SIEMENS
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Siemens IC 10 · 2017
Contactors for Special Applications
SIRIUS 3RT.4 contactors for resistive loads (AC-1), 3-pole
4
1)
If two different conductor cross-sections are connected to one clamping
point, both cross-sections must lie in one of the ranges specified.
Type
3RT2446
3RT2448
3RT1456
3RT1466
3RT1476
Size
S3
S6
S10
S12
Rated data of main contacts (continued)
Load rating with DC
Utilization category DC-3/DC-5,
shunt-wound and series-wound motors (
L/R
15 ms)
• Rated operational currents
I
e
(at 60 °C)
-
1 conducting path
Up to 24 V
A
6
250
380
500
60 V
A
3
7.5
11
110 V
A
1.25
2.5
3
220 V
A
0.35
0.6
440 V
A
0.15
0.17
0.18
600 V
A
0.1
0.12
0.125
-
2 conducting paths in series
Up to 24 V
A
130
140
250
380
500
60 V
A
130
140
250
380
500
110 V
A
130
140
250
380
500
220 V
A
1.75
2.5
440 V
A
0.42
0.65
600 V
A
0.27
0.37
-
3 conducting paths in series
Up to 24 V
A
130
140
250
380
500
60 V
A
130
140
250
380
500
110 V
A
130
140
250
380
500
220 V
A
4
250
380
500
440 V
A
0.8
1.4
600 V
A
0.45
0.75
Switching frequency
Switching frequency
z
in operating cycles/hour
• Contactors without overload relays
No-load switching
frequency AC
1/h
5 000
1 000
2 000
AC/DC no-load switching
frequency
1/h
--
1 000
2 000
• Rated operation
Acc. to AC-1 (AC/DC)
1/h
650
600
Acc. to AC-3 (AC/DC)
1/h
800
1 000
Dependence of the switching frequency
z’
on
the operational current
I
’
and operational voltage
U
’:
z’
=
z
(
I
e
/
I
’
)
(
U
e
/
U
’)
1.5
1/h
Type
3RT2446, 3RT2448
Size
S3
Conductor cross-sections
Main conductors
(1 or 2 conductors can be connected)
Screw terminals
• Solid
mm²
2 x (2.5 ... 16)
1)
• Stranded
mm²
2 x (6 ... 16)
1)
; 2 x (10 ... 50)
1)
; 1 x (10 ... 70)
1)
• Finely stranded with end sleeve (DIN 46228-1)
mm²
2 x (2.5 ... 35)
1)
; 1 x (2.5 ... 50)
1)
• AWG cables, solid or stranded
AWG
2 x (10 ... 1/0)
1)
; 1 x (10 ... 2/0)
1)
• Terminal screws
Hexagon socket, A/F 4
-
Tightening torque
Nm
4.5 ... 6 (40 ... 53 lb.in)
Auxiliary and control conductors
(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)
• Finely stranded with end sleeve (DIN 46228-1)
mm
2
2 x (0.5 ... 1.5)
1)
; 2 x (0.75 ... 2.5)
1)
• AWG cables, solid or stranded
AWG
2 x (20 ... 16)
1)
; 2 x (18 ... 14)
1)
• Terminal screws
M3 (for Pozidriv size 2;
5 ... 6)
-
Tightening torque
Nm
0.8 ... 1.2 (7 ... 10.3 lb.in)
© Siemens AG 2016