User's Manual

For Operation in the Control Cabinet
SIRIUS 3RA6 Compact Starters
General data
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SIRIUS Innovations Supplement 2011
6
To comply with the clearance and creepage distances
demanded according to UL 508 there are the following infeed
possibilities:
SIRIUS 3RA6 compact starters
The SIRIUS 3RA6 compact starters are universal motor starters
according to IEC/EN 60947-6-2. As control and protective
switching devices (CPS) they can connect, convey and discon-
nect the thermal, dynamic and electrical loads from short-circuit
currents up to
I
q
= 30 kA, i.e. they are essentially weld-free. They
combine the functions of a motor starter protectors, a contactor
and a solid-state overload relay in a single enclosure and can be
used wherever standard induction motors up to 32 A (up to ap-
prox. 20 HP at 480 V AC) are started directly. Available versions
are the direct-on-line starters with 45 mm width and the revers-
ing starters with 90 mm width.
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.
3RA6 compact starters are supplied in 5 current setting ranges.
The 3RA61 and 3RA62 have 3 control voltage ranges (AC/DC),
the 3RA64 and 3RA65 have one control voltage range (DC):
Note:
The 3RA1 motor starters can be used as motor starters
> 32 A up to 100 A.
The SENTRON 3VL circuit breakers and the SIRIUS 3RT
contactors can be used for motor starters >100 A.
Operating conditions
The SIRIUS 3RA6 compact starters are suitable for use in nearly
all climates. They are intended for use in enclosed rooms in
which no severe operating conditions (such as dust, caustic va-
pors, hazardous gases) prevail. Suitable covers must be pro-
vided 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 maximum short-circuit current based on UL testing is 30 kA
up to 12 A and 15 kA for the 8 ... 32 A versions at 480 V.
Note:
More technical specifications can be found in the system
manual at
www.siemens.com/compactstarter
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 au-
toreset 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
on site:
• 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 also be evaluated in the higher-level control
system:
• With conventional wiring using the integrated auxiliary and
signaling switches of the compact starter
• With AS-Interface or IO-Link in even greater detail using the
respective communication interface
Four complement variants for 3RA6 compact starters
• For standard mounting rail or screw mounting:
basic version including 1 pair of main circuit terminals and
1 pair of control circuit terminals
• For standard mounting rail or screw mounting when using the
AS-i add-on module:
comes without control circuit terminals because the AS-i add-
on module is attached in lieu of them
• 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 main or control circuit terminals as they are not needed
• The control circuit terminals are always required by the com-
pact starters for IO-Link; the main circuit terminals depend on
the use of the infeed system.
Additional components of the 3RA6
The two control circuit terminals on the 3RA61/3RA62 allow
access to signalling contacts for overload (1 CO) and short-
circuit / malfunction (1 NO). Furthermore, the 3RA61 has two
auxiliary contacts (1 NO + 1 NC) for indicating the position of the
main contacts, while the 3RA62 has one auxiliary contact (1 NO)
per direction of rotation per main contact.
Type of infeed Feeder terminal
(according to UL 508,
type E)
Type
Conventional wiring Terminal block for "Self-
Protected Combination
Motor Controller
(Type E)"
3RV19 28-1H
Three-phase busbars Three-phase infeed ter-
minal for constructing
"Type E Starters",
UL 508
3RV19 25-5EB
Infeed systems for 3RA6 Infeed on left,
50/70 mm
2
, screw
terminal with 3 sockets,
outgoing terminal
with screw/spring-type
connections,
including PE bar
3RA68 13-8AB (screw
terminals),
3RA68 13-8AC
(spring-type terminals)
Current
setting
range
At 460 V AC for
induction
motors
Standard
output P
Rated control supply voltage for
3RA61, 3RA62
compact starters
3RA64, 3RA65
compact starters
for IO-Link
A HP V AC/DC V DC
0.1 ... 0.4 -- 24
42 ... 70
110 ... 240
24
0.32 ... 1.25 1/2
1 ... 4 2
3 ... 12 7 1/2
8 ... 32 20
© Siemens AG 2011