Applications - Siemens SIRIUS 3RT Manual

Industrial controls, switching devices, contactors / contactor assemblies
Hide thumbs Also See for SIRIUS 3RT:
Table of Contents

Advertisement

2.6

Applications

Use and application areas
Various different switching devices are available for switching electrical loads. When
frequent switching is necessary, the contactor is the ideal device.
Contactors are the most commonly used switching devices in industry, mechanical
engineering and switchgear construction. The progressive automation of production plants
has increased the significance of contactors, but this is also associated with higher and
sometimes different requirements.
An automatic production system is significantly more sensitive to operating faults than
manually operated systems. Every fault on an electrical device means a standstill,
production downtime, and often substantial costs for recommissioning.
For this reason, value was placed on high operational reliability in the development of the
SIRIUS contactor series. High service life, high contact reliability, and the option of using the
contactors in the control cabinet at higher ambient temperatures are among the factors
contributing to this. The contactors can be used at up to 60 °C and without derating even
with side-by-side mounting.
Due to the diverse range application options, the range of contactors also encompasses
versions for special applications such as switching resistive loads or switching capacitors, as
well as the main 3RT20 and 3RT10 series for switching motorized loads. Besides the
contactor versions for various load types, there are also special versions for specific areas of
application with extended operating range and special additional approvals for rail
applications or for fail-safe control in safety applications.
The different contactor series with their possible application areas are explained in the
following subsections.
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
Standards
2.6 Applications
27

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents