Specifications
SIRIUS Modular System
System overview
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Siemens LV 1 · 2007
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Robust and reliable: SIRIUS 3RT contactors
Thanks to the extreme robustness and best contact reliability of
our contactors, their switching is extremely precise and reliable.
At the same time they enable you to build compact control cabi-
nets with a high packing density because the auxiliary switch
blocks and coil circuits are inside the contactor's contours. This
facilitates expansions and saves a great deal of space in the
control cabinet.
• A&D Mall: Section Low-Voltage Controls / SIRIUS Industrial
Controls / Controls / Contactors and Contactor Assemblies
• Chapter Controls – Contactors and Contactor
Assemblies
Much more than ON/OFF: the SIRIUS 3RV motor starter protectors
The SIRIUS 3RV motor starter protectors are compact, current
limiting motor starter protectors. They ensure reliable shutdown in
the short-circuit case and protect loads and the system from
overloads. In addition they are suitable for normal switching duty
with loads that have a small number of switching operations as
well as for reliable isolation of the equipment from the supply sys-
tem for maintenance work or modifications.
• A&D Mall: Section Low-Voltage Controls / SIRIUS Industrial
Controls / Protection Equipment / Motor Starter Protectors up to
100 A
• Chapter Protection Equipment
Triggering when things get serious: SIRIUS 3RU and 3RB overload relays
The overload relays of the SIRIUS family are available in a ther-
mal version as well as in a solid-state version for high-feature
applications. They are responsible in the main circuit for the cur-
rent-dependent overload protection of loads and the other
switching and protective devices in the respective load feeder.
• A&D Mall: Section Low-Voltage Controls / SIRIUS Industrial
Controls / Protection Equipment / Overload Relays
• Chapter Protection Equipment
Soft starting and ramp-down: SIRIUS 3RW soft starters
The 3RW soft starters offer a complete range covering all stan-
dard and high-feature motor starting applications. As the result,
the advantages of soft starting and ramp-down can be used
today in a wide range of applications for realizing optimum
machine concepts with greater ease and lower cost.
• A&D Mall: Section Low-Voltage Controls / SIRIUS Industrial
Controls / Load Feeders, Motor Starters and Soft Starters /
3RW Soft Starters
• Chapter Load Feeders, Motor Starters and
Soft Starters
Everything ready for immediate use: with factory-wired SIRIUS load feeders
Load feeders start loads by means of a combination of protective
and switching functions. This requires a wide selection of differ-
ent components in order to be able to realize all starter types. To
keep downtimes as short as possible, Siemens offers factory-
wired starter solutions.
• A&D Mall: Section Low-Voltage Controls / SIRIUS Industrial
Controls / Load Feeders, Motor Starters and Soft Starters
• Chapter Load Feeders, Motor Starters and
Soft Starters
SIRIUS infeed system
When you want to supply current to several motor starter protec-
tors in a group or to complete load feeders, all arguments are in
favor of using the user-friendly SIRIUS infeed system. Thanks to a
terminal block it is also possible to integrate single-pole, two-pole
or three-pole components.
• A&D Mall: Section Low-Voltage Controls / SIRIUS Industrial
Controls / Load Feeders, Motor Starters and Soft Starters /
3RA Fuseless Load Feeders
• Chapter Load Feeders, Motor Starters and
Soft Starters
© Siemens AG 2007