SIEMENS
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Siemens IC 10 · 2017
Power Contactors for Switching Motors
SIRIUS 3RT contactors, 3-pole up to 250 kW
3
1)
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.
Contactors
Type
3RT2045
3RT2046
3RT2047
Size
S3
Rated data of main contacts (continued)
Load rating with DC
Utilization category DC-1,
switching resistive loads (
L/R
1 ms)
• Rated operational currents
I
e
(at 60 °C)
-
1 conducting path
Up to 24 V
A
100
60 V
A
60
110 V
A
9
220 V
A
2
440 V
A
0.6
600 V
A
0.4
-
2 conducting paths in series
Up to 24 V
A
100
60 V
A
100
110 V
A
100
220 V
A
10
440 V
A
1.8
600 V
A
1.0
-
3 conducting paths in series
Up to 24 V
A
100
60 V
A
100
110 V
A
100
220 V
A
80
440 V
A
4.5
600 V
A
2.6
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
40
60 V
A
6
110 V
A
2.5
220 V
A
1
440 V
A
0.15
600 V
A
0.06
-
2 conducting paths in series
Up to 24 V
A
100
60 V
A
100
110 V
A
100
220 V
A
7
440 V
A
0.42
600 V
A
0.16
-
3 conducting paths in series
Up to 24 V
A
100
60 V
A
100
110 V
A
100
220 V
A
35
440 V
A
0.8
600 V
A
0.35
Switching frequency
Switching frequency
z
in operating cycles/hour
Contactors without overload relays
• No-load switching frequency
AC
h
-1
5 000
AC/DC
h
-1
1 000
• Switching frequency
z
during rated operation
1)
-
I
e
/AC-1
At 400 V
h
-1
900
-
I
e
/AC-2
At 400 V
h
-1
400
350
-
I
e
/AC-3
At 400 V
h
-1
1 000
850
-
I
e
/AC-4
At 400 V
h
-1
300
250
200
Contactors with overload relays
• Mean value
h
-1
15
© Siemens AG 2016