Specifications
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Siemens IK PI · 2015
AS-Interface
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Motor starters for use in the control cabinet
SIRIUS 3RA6 compact starters > General data
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Overview
3RA6 fuseless compact starters and infeed system for 3RA6
3RA62 reversing starter
Integrated functionality
The SIRIUS 3RA6 compact starters are a generation of innova-
tive load feeders with the integrated functionality of a motor
starter protector, contactor and solid-state overload relay.
In addition, various functions of optional mountable accessories
(e.g. auxiliary switches, surge suppressors) are already inte-
grated in the SIRIUS compact starter.
Field of application
The SIRIUS compact starters can be used wherever standard
three-phase motors up to 32 A (approx. 15 kW/400 V) are directly
started.
The compact starters are not suitable for the protection of DC
loads.
Approvals according to IEC, UL, CSA and CCC standards have
been issued for the compact starters.
Low variance of devices
Thanks to wide setting ranges for the rated current and wide volt-
age ranges, the equipment variance is greatly reduced com-
pared to conventional load feeders.
Very high operational reliability
The high short-circuit breaking capacity and defined shut-down
when the end of service life is reached means that the SIRIUS
compact starter achieves a very high level of operational reliabil-
ity that would otherwise have only been possible with consider-
able additional outlay. This sets it apart from devices with similar
functionality.
Safe disconnection
The auxiliary switches (NC contacts) of the 3RA6 compact start-
ers are designed as mirror contacts. It is therefore possible to
use safe disconnection equipment, e.g. EMERGENCY-STOP,
up to Category 2 (EN 954-1), or combine it with other redundant
switching devices for use 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 starter.
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 starters for IO-Link see
Chapter 5: "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 starter needing to
be connected.
A compact starter 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
replace a compact starter.
Consistent solution from the infeed to the motor feeder
The SIRIUS infeed system for 3RA6 with integrated PE bar is
offered as a user-friendly possibility of feeding in summation
currents 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 terminals
The SIRIUS compact starters 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
starters
and matching infeed.
Types of infeed for the 3RA6 fuseless compact starters
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
IKPI_04_en.book Seite 82 Montag, 6. Oktober 2014 11:32 11
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