Siemens SIRIUS 3RF Series

SIRIUS 3RT2 contactors/contactor assemblies
2.8 Technical data
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
253
Type 3RT20
23
3RT20
24
3RT20
25
3RT20
26
3RT20
27
3RT20
28
Size S0
Main circuit - Current carrying capacity for direct current
Up to 24 V A 35
60 V A 35
110 V A 35
220 V A 10
440 V A 0.6
- 3 current paths in series
600 V A 0.6
Switching frequency
Switching frequency z in operating cycles/hour
No-load switching
frequency AC
h
-1
5000
 Contactors without overload
relay
No-load switching
frequency DC
h
-1
1500
AC-1 (AC/DC) h
-1
1000
AC-2 (AC/DC) h
-1
1000 750
AC-3 (AC/DC) h
-1
1000 750
Dependency of switching
frequency z’on operational
current I’ and operational
voltage U’:
z’ = z ⋅(Ie/I’) ⋅(400 V/U’)1.5 ⋅1/h
AC-4 (AC/DC) h
-1
300 250
 Contactors with overload relay (mean value)
h
-1
15