SIEMENS
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Siemens IC 10 · 2017
Load Feeders and Motor Starters for Use in the Control Cabinet
SIRIUS 3RA6 Compact Starters
General data
8
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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 special
load feeders with the integrated functionality of a motor starter
protector, contactor and electronic overload relay. In addition,
various functions of optional mountable accessories (e.g. auxil-
iary switches, surge suppressors) are already integrated in the
SIRIUS compact starter.
3RA6 compact starters with the integrated functionality of a motor starter
protector, contactor and electronic overload relay.
Applications
SIRIUS compact starters can be used wherever standard
three-phase motors or resistive loads up to 32 A
(approx. 15 kW/400 V) are directly started or switched.
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.
Very high operational reliability
The high short-circuit breaking capacity and defined shut-down
when the end of service life is reached mean 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
starters are designed as mirror contacts. This enables their use
for safe disconnection – e.g. EMERGENCY STOP up to SIL 1
(IEC 62061) or PL c (ISO 13849-1) or, if used in conjunction with
an additional infeed contactor, up to SIL 3 (IEC 62061) or PL e
(ISO 13849-1).
Communications integration through AS-Interface
For the integration of communication via 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
Up to four compact starters in IO-Link version (reversing and
direct-on-line starters) can be connected together and conve-
niently linked to the IO-Link master through a standardized
IO-Link connection. The SIRIUS
4SI electronic modules are used
e.g. as IO-Link masters for connection to the SIMATIC ET 200S
distributed I/O system.
The IO-Link connection enables a high density of information in
the local range.
For details of the communication connection using IO-Link,
see page 2/101 onwards
.
The diagnostics data of the process collected by the 3RA6 com-
pact starter, e.g. short circuit, end of service life, limit position,
etc., are not only indicated on the compact starter itself but also
transmitted to the higher-level control system through IO-Link.
Thanks to the optionally available operator panel, which can be
installed in the control cabinet door, it is easy to control the 3RA6
compact starters with IO-Link from the control cabinet door.
Permanent wiring/easy replacement
Using the SIRIUS infeed system for 3RA6
(see page 8/79)
, it is
possible to carry out the wiring in advance without a compact
starter having 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.
More information
Home page,
see www.siemens.com/compactstarter
Industry Mall,
see www.siemens.com/product?3RA68
Online configurator,
see www.siemens.com/sirius/configurators
© Siemens AG 2016