Siemens SIRIUS 3RF Series

System overview
1.7 Components and combinations
SIRIUS Innovations
48 System Manual, 01/2011, A8E56203870002-03
1.7.1.2 SIRIUS 3RF34 solid-state switching devices
3RF34 solid-state switching devices
Figure 1-15 Solid-state switching device
SIRIUS 3RF34 solid-state switching devices feature a heat sink integrated in the insulated
enclosure, so no grounding is required.
Table 1- 10 3RF34 solid-state switching devices
Area Customer benefits
Functions
 Instantaneous switching solid-state contactors for motor switching
 Direct-on-line and reversing contactor (integrated electric interlock).
Dimensioning and
design
 S0 (0.5 to 16 A)
 Width 45 mm (2.2 kW/5.4 A) or 90 mm (7.5 kW/16 A)
 24 V DC and 110 to 230 V AC
 Rated voltage up to 600 V
 Insulated enclosure
 Optimized sizing and few power versions up to 7.5 kW
 Screw-type and spring-loaded terminals
Mounting
advantages
 Combination with protection devices and monitoring devices
 Side-by-side assembly possible
 Easy connection to the motor starter protector by means of link module
 Connection option for solid-state overload relay or current monitoring relay
 Removable terminals for auxiliary circuit wiring
Application
areas/customer
benefits
 Wear- and noise-free operation for frequent motor switching
 Long service life (over 100 million operating cycles)
 Comprehensive approvals for global applicability
Reference
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About SIRIUS 3RF34 solid-state switching
devices
Chapter "SIRIUS 3RF34 solid-state switching
devices (Page 313)"