Specifications

AS-Interface Slaves
Motor starters for operation in the control cabinet
3RA6 compact feeders
General data
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Siemens IK PI · 2009
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■ Overview (continued)
3RA6 fuseless compact feeders are available with 5 current
setting ranges and 3 control voltage ranges:
The 3 control voltage ranges are:
• 24 V AC/DC
• 42 ... 70 V
• 110 ... 240 V
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
contactors can be used for fuseless load feeders >100 A.
For information, see the Catalogs LV 1 and LV 1 T.
Operating conditions
The SIRIUS 3RA6 compact feeders 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 feeders are generally designed to degree
of protection IP20. The permissible ambient temperature during
operation is -20 ... +60°C.
The operating short-circuit current based on IEC/EN 60947-6-2
is 53 kA at 400 V.
Note:
Further technical specifications can be found in the system
manual, stored at
http://www.siemens.de/kompaktabzweig
Overload tripping times
The overload tripping time can be set on the device to less than
10 s (CLASS 10) and less than 20 s (CLASS 20 for heavy start-
ing). 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 feeder provides the following diagnostics options:
• With LEDs:
- Connection to the control voltage
- Position of the main contacts.
• With mechanical indication:
- 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 be evaluated in addition in the higher-level
control system by means of the integrated auxiliary switches and
signal switches of the compact feeder.
Four complement variants for 3RA6 compact feeders
• For standard mounting rail or screw fixing:
basic version including 1 pair of main circuit
terminals and 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 mod-
ule 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
AS-i add-on module:
without terminal complement (also for reordering when replac-
ing the compact feeder)
■ Benefits
The SIRIUS 3RA6 compact feeders offer a number of advan-
tages, the most important being:
• Compact design saves space in the control cabinet
• Little planning and assembly work and far less wiring thanks
to a single complete unit with one order number
• Little variance through 3 wide voltage ranges and 5 wide set-
ting ranges for the rated current mean low stock levels
• High plant availability through integrated functionalities such
as prevention of main contact welding and shut-down at end
of service life
• Greater productivity through automatic device reset in case of
overload and differentiated detection of overload and short-
circuit
• Easy checking of the wiring and testing of the motor direction
prior to start-up thanks to optional "control kits"
• Speedy replacement of devices thanks to removable termi-
nals with spring-loaded and screw connections in the main
and control circuit
• Efficient power distribution through the related SIRIUS infeed
system for 3RA6
• Direct connection of the motor feeder cable to the SIRIUS
infeed system for 3RA6 thanks to integrated PE bar
• Connecting and looping through incoming feeders up to a
cross-section of 70 mm²
• When using the infeed system for 3RA6, possibility of directly
connecting the motor cable without intermediate terminals
• Integration in Totally Integrated Automation thanks to the
optional connection to AS-Interface
Overall width
of direct-on-
line starter
Width
reversing
starter
Current set-
ting range
At 400 V AC for
induction motors
up to
mm mm A kW
45
90 0.1 ... 0.4 0.09
45
90 0.32 ... 1.25 0.37
45
90 1 ... 4 1.5
45
90 3 ... 12 5.5
45
90 8 ... 32 15