SIEMENS
6/59
Siemens IC 10 · 2017
* You can order this quantity or a multiple thereof.
Illustrations are approximate
Solid-State Switching Devices for Resistive/Inductive Loads
General data
6
Use in fuseless load feeders
Compared with the fused configuration of load feeders, short
circuit and line protection using miniature circuit breakers is
easy to achieve with SIRIUS 3RF2 solid-state relays and
contactors.
A special version of the solid-state contactors can be protected
against damage in the case of a short circuit with a miniature
circuit breaker with type B tripping characteristic. This allows the
low-cost and simple design of fuseless load feeders with full
protection of the switchgear.
■
Selection and ordering data
Inscription labels for 3RF2 series
1)
PC labeling system for the individual inscription
of unit labeling plates are available from:
murrplastik Systemtechnik GmbH
see page 16/20
.
■
More information
Notes on integration in the load feeders
The SIRIUS solid-state switching devices are very easy to
integrate into the load feeders thanks to their industrial
connection method and design.
Particular attention must however be paid to the circumstances
of the installation and ambient conditions, as the performance of
the solid-state switching devices is largely dependent on these.
Depending on the version, certain restrictions must be
observed. Detailed information in relation to solid-state
contactors, e.g. on minimum spacing, and in relation to solid-
state relays on the choice of heat sink can be found in the
technical specifications and in the product data sheets,
see
.
Short-circuit and overload protection
Despite the rugged power semiconductors that are used, solid-
state switching devices respond more sensitively to short
circuits in the load feeder. Consequently, special precautions
have to be taken against destruction, depending on the type of
design.
Siemens generally recommends using SITOR semiconductor
protection fuses. These fuses also provide protection against
destruction in the event of a short circuit even when the solid-
state contactors and solid-state relays are fully utilized.
Alternatively, if there is lower loading, protection can also be
provided by standard fuses or miniature circuit breakers. This
protection is achieved by overdimensioning the solid-state
switching devices accordingly. The technical specifications and
the product data sheets contain details both about the solid-
state fuse protection itself and about use of the devices with
conventional protection equipment.
Electromagnetic compatibility (EMC)
The solid-state switching devices are suitable for interference-
free operation in industrial networks without further measures. If
they are used in public networks, it may be necessary for
conducted interference to be reduced by means of filters.
This does not include the solid-state contactors for resistive
loads of the special type 3RF23..-.CA.. "Low Noise". These
comply with the class B limit values up to a rated current of 16 A.
If other versions are used, and at currents of over 16
A, standard
filters can be used in order to comply with the limit values. The
decisive factors when it comes to selecting the filters are
essentially the current loading and the other parameters
(operational voltage, design type, etc.) in the load feeder.
Suitable filters can be ordered from EPCOS AG. For more
information
see www.epcos.com
.
Product information and technical specifications
For product data sheets with detailed technical specifications,
dimensional drawings and characteristic curves
see
.
For additional information, please enter the article number of the
required device under the tab "Product List".
Designation
Labeling area
(W x H)
Color
SD
Article No.
Price
per PU
PU
(UNIT,
SET, M)
PS*
PG
mm x mm
d
Blank labels
3RT19 00-1SB20
(1 frame = 20 units)
Unit labeling plates
for
SIRIUS
1)
10 x 7
Pastel
turquoise
15
3RT1900-1SB10
100
816 units
41B
20 x 7
Pastel
turquoise
20
3RT1900-1SB20
100
340 units
41B
Adhesive labels
for SIRIUS
19 x 6
Pastel
turquoise
15
3RT1900-1SB60
100
3 060 units
41B
19 x 6
Zinc yellow
15
3RT1900-1SD60
100
3 060 units
41B
NSB0_01429b
© Siemens AG 2016