Specifications
AS-Interface slaves
Motor starters for operation in the control cabinet
SIRIUS 3RA6 compact feeders
General data
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Overview
3RA6 fuseless compact feeders and infeed system for 3RA6
3RA62 reversing starters
Integrated functionality
The SIRIUS 3RA6 compact feeders are a generation of innova-
tive load feeders with the integrated functionality of a motor
starter protector, contactor and solid-state overload relay. In ad-
dition, various functions of optional mountable accessories (e.g.
auxiliary switches, surge suppressors) are already integrated in
the SIRIUS compact feeder.
Application
The SIRIUS compact feeders can be used wherever standard in-
duction motors up to 32 A (approx. 15 kW/400 V) are directly
started.
The compact feeders are not suitable for the protection of single-
phase AC or DC loads.
Approvals according to IEC, UL, CSA and CCC standards have
been issued for the compact feeders.
Low equipment variance
Thanks to wide setting ranges for the rated current and wide
voltage ranges, the equipment variance is greatly reduced com-
pared to conventional load feeders.
Very high operational reliability
Through the high short-circuit breaking capacity and defined
shut-down when the end of service life is reached means that the
SIRIUS compact feeder achieves a very high level of operational
reliability that would otherwise have only been possible with con-
siderable additional outlay. This sets it apart from devices with
similar functionality.
Safe disconnection
The auxiliary switches (NC contacts) of the 3RA6 compact feed-
ers are designed as mirror contacts. It is thus possible to use the
devices for safe disconnection, e.g. emergency-stops, up to
Category 2 (EN 954-1) and together with other redundancy
switching devices up to Category 3 or 4.
Communications integration through AS-Interface
To enable communications integration through AS-Interface
there is an AS-i add-on module available in several versions for
mounting instead of the control circuit terminals on the SIRIUS
compact feeder.
The design of the AS-i add-on module permits a group of up to
62 feeders with a total of four cables to be connected to the con-
trol system. This reduces wiring work considerably compared to
the parallel wiring method.
Communications integration using IO-Link
SIRIUS 3RA64, 3RA65 compact feeders for IO-Link see
Chapter 7: "IO-Link".
Permanent wiring/easy replacement
Using the SIRIUS infeed system for 3RA6 it is possible to carry
out the wiring in advance without a compact feeder needing to
be connected.
A compact feeder is very easily replaced simply by pulling it out
of the device without disconnecting the wiring.
Even with screw connections or mounting on a standard mount-
ing rail there is no need to disconnect any wiring (on account of
the removable main and control circuit terminals) in order to re-
place a compact feeder.
Consistent solution from the infeed to the motor feeder
The SIRIUS infeed system for 3RA6 with integrated PE bar is of-
fered as a user-friendly possibility of feeding in summation cur-
rents up to 100 A with a maximum conductor cross-section of
70 mm² and connecting the motor cable directly without addi-
tional intermediate terminals.
Screw and spring-type connections
The SIRIUS compact feeders and the infeed system for 3RA6
are
available with screw and spring-type terminals.
System configurator for engineering
A free system configurator is available to reduce further the
amount of engineering work for selecting the required compact
feeders and matching infeed.
Types of infeed for the 3RA6 fuseless compact feeders
On the whole four different infeed possibilities are available:
• Parallel wiring
• Use of three-phase busbars (combination
with SIRIUS motor
starter protectors and SIRIUS contactors possible)
• 8US busbar adapters
• SIRIUS infeed system for 3RA6
To comply with the clearance and creepage distances
demanded according to UL 508 there are the following infeed
possibilities:
Screw terminals
Spring-type terminals
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© Siemens AG 2011