System overview
SIRIUS System Manual
1-2
GWA 4NEB 430 0999-02b
Introduction
Siemens is one of the leading manufacturers of switchgear. The product
range extends from devices that switch a few mA to circuit breakers used in
power distribution.
Throughout the continuing development of these products we have always
striven to ensure that requirements in terms of fundamental performance
features, electrical and mechanical service life, dimensions, and ease of
installation and maintenance are met or exceeded.
We have been able to meet the demands resulting from increased environ-
mental awareness, particularly in the last ten years or so, by developing and
using environment-friendly and recyclable materials. As a result, we have
developed modern industrial switching devices, particularly in the field of
low-voltage switchgear, that meet all the relevant demands in terms of envi-
ronment-friendliness.
Building on decades of experience, we have created a completely new gen-
eration of circuit breakers, contactors, auxiliary contactors, overload relays,
contactor relays, time relays, and 3RW3 semiconductor motor control
devices (referred to below as soft starters) under the name SIRIUS for the
large and continuously growing number of motor drives in the range up to
45 kW.
These new SIRIUS devices fulfill all the demands placed on them in practice
and can be used as stand-alone devices or modular components of com-
plete load feeders, or integrated in low-voltage distribution cabinets or low-
voltage switching stations.
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