SIEMENS
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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
(continued)
SIRIUS 3RA6 compact starters
The SIRIUS 3RA6 compact starters are universal motor feeders
according to IEC 60947-6-2. As control and protective switching
devices (CPS) they can connect, convey and disconnect the
thermal, dynamic and electrical loads from short-circuit currents
up to
I
q
= 53 kA, i.e. they are practically weld-free. They combine
the functions of a motor starter protector, a contactor and a solid-
state overload relay in one enclosure. Direct-on-line starters with
45 mm width and reversing starters with 90 mm width are
available as variants.
The reversing starter version comes with not only an internal
electrical interlock but also with a mechanical interlock
to prevent
simultaneous actuation of both directions of rotation.
The compact starters have isolating features in accordance with
IEC 60947.2 and can be used as disconnector units (main con-
trol switch according to DIN EN 60204 or DIN VDE 0113).
Isolation is effected by moving the handle into the "OFF" position,
disconnection by means of the control contacts is not enough.
3RA6 fuseless compact starters are supplied for 5 different
current setting ranges. The 3RA61 and 3RA62 have 2 control
voltage ranges (AC/DC), the 3RA64 and 3RA65 have one control
voltage range (DC):
Note:
The 3RA1 load feeders can be used for fuseless load feeders
> 32 A up to 100 A.
The SENTRON 3VL circuit breakers and the SIRIUS 3RT contac-
tors can be used for fuseless load feeders >100 A.
Operating conditions
The SIRIUS 3RA6 compact starters are suitable for use in any
climate. They are intended for use in enclosed rooms in which no
severe operating conditions (such as dust, caustic vapors,
hazardous gases) prevail. Suitable covers must be provided for
installation in
dusty and damp locations
.
The SIRIUS compact starters are generally designed to degree
of protection IP20. The permissible ambient temperature during
operation is -20 to +60 °C.
The rated short-circuit current
I
CS
according to IEC 60947-6-2 is
53 kA at 400 V.
Note:
The maximum permissible short-circuit currents of the device
versions for the various forms of power supply and voltages
are available on request from Technical Assistance:
Tel.: +49 (9 11) 8 95-59 00
E-mail:
technical-assistance@siemens.com
.
Overload tripping times
The tripping time in the event of overload can be set on the
device to normal startup conditions (CLASS 10) and to heavy
starting conditions (CLASS 20). As the breaker mechanism still
remains closed after an overload, resetting is possible by either
local manual reset or autoreset after 3 minutes cooling time.
With autoreset there is no need to open the control cabinet.
Diagnostics options
The compact starter provides the following diagnostics options:
•
With LEDs
- Connection to the control voltage
- Position of the main contacts
•
With mechanical display
- Tripping due to overload
- Tripping due to short circuit
- Tripping due to malfunction (end of service life reached
because of worn switching contacts or a worn switching
mechanism or faults in the control electronics)
These states can also be evaluated in the higher-level control
system:
•
With parallel wiring using the integrated auxiliary and signal-
ing switches of the compact starter
•
With AS-Interface or IO-Link in even greater detail using the
respective communication interface
Four complement versions for 3RA61/3RA62 compact starters
•
For standard mounting rail or screw fixing:
basic version including 1 pair of main circuit terminals and
1 pair of control circuit terminals
•
For standard mounting rail or screw fixing when using the
AS-i add-on module:
without control circuit terminals because the
AS-i add-on module is plugged on instead
•
For use with the infeed system for 3RA6:
without main circuit terminals because they are supplied with
the infeed system and the expansion modules
•
For use with the infeed system for 3RA6 and the
AS-i add-on module: without terminal complement
(also for reordering when replacing the compact starter)
•
The control circuit terminals are always required by the
compact starters for IO-Link; the main circuit terminals
depend on the use of the infeed system.
Type of infeed
Infeed terminal
(acc. to UL 508, type E)
Type
Parallel wiring
Terminal block for
"Self-Protected Combi-
nation Motor Controller
(Type E)"
3RV2928-1H
Three-phase busbars
Three-phase infeed
terminal for construct-
ing "Type E Starters",
UL 508
3RV2925-5EB
Infeed system for 3RA6
Infeed on left,
50/70 mm
2
, screw
terminal with 3 sockets,
outgoing terminal
with screw/spring-type
connections,
including PE bar
3RA6813-8AB
(screw terminals),
3RA6813-8AC
(spring-type terminals)
Current
setting
range
At 400 V AC for
three-phase
motors
Standard
output
P
Rated control supply voltage for
3RA61, 3RA62
compact starters
3RA64, 3RA65
compact starters
for IO-Link
A
kW
V AC/DC
V DC
0.1 ... 0.4
0.09
24
110 ... 240
24
0.32 ... 1.25
0.37
1 ... 4
1.5
3 ... 12
5.5
8 ... 32
15
© Siemens AG 2014