Specifications
SIRIUS Modular System
System overview
2/80
Siemens LV 1 · 2007
2
■
Overview
A perfect team: The SIRIUS modular system for the control
cabinet
Building switchgear cabinets should be quick, easy, flexible and
space-saving. But how can all these requirements be met simul-
taneously? The answer lies in the unique SIRIUS modular
system, where you will find everything that you need for switch-
ing, protecting and starting motors and industrial systems.
This modular selection of standard components covers the
range up to 250 kW / 400 V in just seven sizes which are opti-
mally coordinated, can be combined with ease and use the
same accessories. Control technology can be that simple.
Continuous further development and regular innovations ensure
that our customers are optimally equipped with SIRIUS and ben-
efit from efficient solutions - today and tomorrow.
All components of the SIRIUS modular system are characterized
by a space-saving design and high flexibility. Configuring, in-
stalling, wiring and maintenance are extremely easy and time-
saving to perform.
Regardless of whether you want to build up load feeders with
motor starter protectors or overload relays, contactors or soft
starters, SIRIUS has the right product for every application.
SIRIUS stands for innovation
To be able to meet our customers' requirements tomorrow as
well as today we are dedicated to the ongoing development of
our product portfolio.
The new 3RB2 solid-state overload relays
With the newly developed SIRIUS 3RB2 solid-state overload
relays for both standard and high-feature requirements it is now
possible to provide motor and system protection over the full
range from 0.1 to 630 A. Thanks to the large setting range it is
possible, furthermore, to cover this current range with a mini-
mum number of variants, which compared to the "classic" bi-
metal relays has been reduced by up to 90 %. And this variance
can be minimized further by the modular design of the devices
for high-feature requirements. With these devices for full motor
protection it is possible to transmit alarm signals, current values
and the like, e.g. for further processing in the PLC.
The SIRIUS 3RB2 solid-state overload relays are coordinated
with the other components of the SIRIUS modular system with
regards to their electric rating, mechanics and dimensions.
The SIRIUS 3RB2 solid-state overload relays reduce stock and
product variance, simplify configuring, mounting and start-up,
increase plant availability and enable customized solutions.
© Siemens AG 2007