Siemens Automobile Electronics 3RA2 Benutzerhandbuch
Combination Starters & Starters for Group Installation
SIRIUS 3RA2 Motor Starters
General data
6/3
SIRIUS Innovations Supplement 2011
6
3RA2 complete units
The 3RA2 fuseless motor starters can be ordered as preassem-
bled complete units for direct-on-line starting (3RA21) or for
reversing duty (3RA22) with screw connection.
bled complete units for direct-on-line starting (3RA21) or for
reversing duty (3RA22) with screw connection.
Control supply voltages of AC 50/60 Hz 110/120 V and 24 V DC
are available to choose from.
are available to choose from.
A distinction is also drawn between whether the starter is
mounted on a 35 mm standard mounting rail, on a flat surface
using screws, or on a 60 mm busbar system.
mounted on a 35 mm standard mounting rail, on a flat surface
using screws, or on a 60 mm busbar system.
Accessories
As the 3RA2 fuseless motor starters are constructed from 3RV2
motor starter protectors and 3RT2 contactors, the same acces-
sories - such as auxiliary switches, undervoltage releases or
door-coupling rotary operating mechanisms - can be used for
the 3RA2 fuseless motor starters as for these motor starter pro-
tectors and contactors.
motor starter protectors and 3RT2 contactors, the same acces-
sories - such as auxiliary switches, undervoltage releases or
door-coupling rotary operating mechanisms - can be used for
the 3RA2 fuseless motor starters as for these motor starter pro-
tectors and contactors.
In particular, certain accessories have been optimized for the
fuseless motor starters. They include the top-connected, trans-
verse auxiliary switch on the motor starter protector, which is
available with 1 CO contact or 1 NO contact + 1 NC contact.
Special auxiliary switch blocks that can be snapped on from
below are available for the contactor. These two accessories
enable the fuseless motor starters to be wired simply without
having to route cables through the device.
fuseless motor starters. They include the top-connected, trans-
verse auxiliary switch on the motor starter protector, which is
available with 1 CO contact or 1 NO contact + 1 NC contact.
Special auxiliary switch blocks that can be snapped on from
below are available for the contactor. These two accessories
enable the fuseless motor starters to be wired simply without
having to route cables through the device.
Incoming energy supply
On the whole four different infeed possibilities are available
(see
"3RV29 Infeed System for Motor Starters" on page 6/31)
.
Customer assembly of fuseless motor starters
While the preassembled 3RA2 can be ordered up to 32 A, com-
binations in customer assembly without link modules are also
possible up to 40 A (approx. 25 HP/460 V).
binations in customer assembly without link modules are also
possible up to 40 A (approx. 25 HP/460 V).
Thanks to the SIRIUS modular system, the standard devices can
be optimally combined in terms of both technical specifications
and dimensions.
be optimally combined in terms of both technical specifications
and dimensions.
The fuseless motor starters can also be assembled easily by the
customer. It is simply necessary to assemble the standard 3RV2
motor starter protector, the 3RT2 contactor and the appropriate
assembly kit.
customer. It is simply necessary to assemble the standard 3RV2
motor starter protector, the 3RT2 contactor and the appropriate
assembly kit.
For single devices and assembly kits see "Selection and order-
ing data" for 3RA21 direct-on-line starters and 3RA22 reversing
starters.
ing data" for 3RA21 direct-on-line starters and 3RA22 reversing
starters.
For assembly kits for direct-on-line starting or reversing duty for
mounting on standard mounting rails or busbars see "Selection
and ordering data" for "Accessories".
mounting on standard mounting rails or busbars see "Selection
and ordering data" for "Accessories".
For reversing starters size S0 it is imperative to use a standard
mounting rail adapter in order to ensure the necessary mechan-
ical strength. A standard mounting rail adapter is not necessary
if a busbar adapter is used.
mounting rail adapter in order to ensure the necessary mechan-
ical strength. A standard mounting rail adapter is not necessary
if a busbar adapter is used.
The 3RA1 fuseless motor starters can be used for the fuseless
motor starters between 32 A and 100 A.
motor starters between 32 A and 100 A.
The SENTRON 3VL circuit breakers and the SIRIUS 3RT contac-
tors are available for rated currents >100 A.
tors are available for rated currents >100 A.
Special equipment for customer assembly can be ordered if
other rated control supply voltages are required. Assembly kits
can be used to facilitate assembly.
other rated control supply voltages are required. Assembly kits
can be used to facilitate assembly.
Customers can also assemble tested combinations of motor
starter protectors with solid-state controls (soft starters, solid-
state contactors) and motor starters with additional monitoring
and control devices (3RR monitoring relays, SIMOCODE 3UF).
starter protectors with solid-state controls (soft starters, solid-
state contactors) and motor starters with additional monitoring
and control devices (3RR monitoring relays, SIMOCODE 3UF).
For the electrical and mechanical connection of protection
equipment and controls there are preassambled assembly kits
(link modules, wiring kits and standard mounting rail or busbar
adapters).
equipment and controls there are preassambled assembly kits
(link modules, wiring kits and standard mounting rail or busbar
adapters).
The following types of configuration are possible:
• Direct-on-line/reversing starting (see preassembled 3RA2
• Direct-on-line/reversing starting (see preassembled 3RA2
combinations)
• Wye-delta starting (only customer assembly with link module)
• Solid-state/soft starting (only customer assembly with link
• Solid-state/soft starting (only customer assembly with link
module)
© Siemens AG 2011