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)
600 A for 3RT1476-. N. contactor
2)
Industrial furnaces and electric heaters with resistance heating, etc.
(increased power consumption on heating up has been taken into
account)
Type
3RT2446
3RT2448
3RT1456
3RT1466
3RT1476
Size
S3
S6
S10
S12
Rated data of the main contacts
Load rating with AC
Utilization category AC-1,
switching resistive loads
• Rated operational currents
I
e
At 40 °C up to 690 V
A
140
160
275
400
690
At 60 °C up to 690 V
A
130
140
250
380
650
1)
at 1 000 V
A
60
80
100
150
250
• Rated power for AC loads
2)
with p.f. = 0.95 (at 60 °C)
At 230 V
kW
49
53
95
145
245
400 V
kW
86
92
165
250
430
500 V
kW
107
115
205
315
535
690 V
kW
148
159
285
430
740
1 000 V
kW
98
131
165
247
410
• Minimum conductor cross-section
for loads with
I
e
At 40 °C
mm
2
50
70
2 x 70
240
2 x 240
At 60 °C
mm
2
50
120
240
2 x 240
Utilization categories AC-2 and AC-3
With an electrical endurance of 1.3 million operating cycles
• Rated operational currents
I
e
Up to 400 V
A
44
97
138
170
Up to 690 V
A
44
97
138
170
• Rated power for slipring
or squirrel-cage motors
At 50 and 60 Hz
At 230 V
kW
12.7
30
37
55
400 V
kW
22
55
75
90
500 V
kW
29.9
55
90
110
690 V
kW
38.2
90
132
160
Power loss per conducting path
At
I
e
/AC-1 W
--
20
27
55
Load rating with DC
Utilization category DC-1,
switching resistive load (
L/R
1 ms)
• Rated operational currents
I
e
(at 60 °C)
-
1 conducting path
Up to 24 V
A
130
140
250
380
500
60 V
A
80
250
380
500
110 V
A
12
18
33
220 V
A
2.5
3.4
3.8
440 V
A
0.8
0.8
0.9
600 V
A
0.48
0.5
0.6
-
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
13
20
380
500
440 V
A
2.4
3.2
4
600 V
A
1.3
1.6
2
-
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
130
140
250
380
500
440 V
A
6
11.5
11
600 V
A
3.4
4
5.2
© Siemens AG 2016