Load feeders, motor and soft
starters
SIRIUS 3RA6 Compact Starter
System Manual
Introduction
Product-specific information
System description
Configuration
Communication via
AS-Interface
Description of the hardware
Functions
1
2
3
4
5
6
7
Installation/Removal
Connecting
Commissioning
Diagnostics
Accessories
Service
Technical data
8
9
10
11
12
13
14
02/2008
GWA 4NEB 560 0601-02 DS 02
Dimension drawings
Circuit diagrams
Appendix
15
16
A
Safety Guidelines
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
CAUTION
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
NOTICE
indicates that an unintended result or situation can occur if the corresponding information is not taken into
account.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The device/system may only be set up and used in conjunction with this documentation. Commissioning and
operation of a device/system may only be performed by qualified personnel. Within the context of the safety notes
in this documentation qualified persons are defined as persons who are authorized to commission, ground and
label devices, systems and circuits in accordance with established safety practices and standards.
Prescribed Usage
Note the following:
WARNING
This device may only be used for the applications described in the catalog or the technical description and only
in connection with devices or components from other manufacturers which have been approved or
recommended by Siemens. Correct, reliable operation of the product requires proper transport, storage,
positioning and assembly as well as careful operation and maintenance.
Trademarks
All names identified by ® are registered trademarks of the Siemens AG. The remaining trademarks in this
publication may be trademarks whose use by third parties for their own purposes could violate the rights of the
owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens AG
Automation and Drives
Postfach 48 48
90327 NÜRNBERG
GERMANY
3 System description .................................................................................................................................. 13
3.1 System overview..........................................................................................................................13
3.2 System configuration ...................................................................................................................15
3.2.1 System configuration without optional A
3.2.2 System configuration with optional AS-i mounting m
12.1 Control kit .................................................................................................................................... 89
A Appendix................................................................................................................................................ 173
Table 12-12 Bus bar system ..........................................................................................................................121
Table 12-13 Conductor cross-sections of the terminal for a self-protected combination motor controller
(Type E) to UL 508.....................................................................................................................128
This SIRIUS 3RA6 Compact Starter Manual describes the compact starter and its functions.
It contains information about configuration, commissioning and servicing.
As well as providing information about the compact starter itself, the manual also deals with
compatible infeed systems. These are the SIRIUS infeed system for 3RA6, the
insulated 3RV19 three-phase busbar system and the 8US busbar adapter. The options in
terms of connecting to circuit breakers of other sizes and to the 3RV19 infeed system are
also discussed within this context.
Furthermore, to facilitate configuration the manual contains dimension drawings and
technical data of the system components.
Topics
The manual consists of instructive chapters, which are intended for reference purposes. The
following table provides an overview of the topics covered:
Table 1-1 Chapter overview
Chapter Contents
Introduction Provides an overview of the manual's contents
Product-specific information Provides product-specific information about the compact starter
System description Provides an overview of the system components and their
Configuration Provides information (e.g. environmental requirements, use in
Communication via
AS-Interface
Description of the hardware Describes the compact starter's display elements and operator
Functions Describes the compact starter's functions
Installation/Removal Describes how to install and remove the compact starter
Connection Describes how to connect the compact starter
Commissioning Provides information about the possible settings on the compact
Diagnostics Provides information about what defined display element states
1
integration into the automation environment
combination with other products, etc.) about using the compact
starter and accessories, which need to be taken into account right
from the configuration stage
Provides information about communication based on an
AS-Interface
controls
starter and addressing of the AS-i mounting module
signal in terms of device states and describes diagnostics via the
AS-Interface
Chapter Contents
Accessories Provides information about accessories (control kit, auxiliary switch
block for compact starter, infeed system for 3RA6, 3-phase busbar,
8US busbar adapter, type E terminal, door-coupling rotary operating
mechanism). This information includes a description of the hardware
as well as the installation/removal and connection processes.
Service Provides information about servicing or maintenance activities. This
includes exchanging the entire compact starter or the individual
terminal blocks. This chapter also explains the order number system
used for the compact starter.
Technical data Provides technical data for the compact starter and its accessories
Dimension drawings Provides dimension drawings for the compact starter and its
accessories
Circuit diagrams Provides circuit diagrams for the compact starter
Required basic knowledge
To understand this manual, you will need to have a general knowledge of low-voltage
controls and distribution and also of automation.
Symbols used in the text
The following table explains the meaning of the various symbols used within this document:
The 3RA6 compact starter conforms to the following standards:
● IEC / EN 60947-6-2
● UL 508 Type E
● CSA C22.2 No. 14 Type E
Approvals/Test reports
UL and CSA approval was being sought at the time of going to press. Once approval has
been obtained, the compact starter will be marked with the symbols
Note
- Marking
2
and .
Any compact starter that does not bear the
Confirmation of approvals, test certificates and characteristic curves is available via the
Internet:
www.siemens.de/lowvoltage/technical-assistance
Compact starter degree of protection
The compact starter's degree of protection is IP20. In the terminal area it features
IP00 degree of protection.
Infeed system degree of protection for 3RA6
The infeed system for the 3RA6 features IP20 degree of protection. In the terminal area it
features IP00 degree of protection.
Isolating features
The requirements of IEC / EN 60947-3 have been met in respect of the isolating features.
Main switch and EMERGENCY STOP/EMERGENCY OFF function
The main switch and EMERGENCY STOP/EMERGENCY OFF meet the requirements of
IEC / EN 60204-1.
Characteristic curves
If required, you can request the characteristic curves for all setting ranges by sending an email to our Technical Assistance team: technical-assistance@siemens.com. Alternatively,
you can get them by visiting the following website:
www.siemens.de/lowvoltage/technical-assistance
2.2 Use as prescribed
Compact starter
Prescribed use in accordance with IEC / EN 60947-6-2.
The SIRIUS 3RA6 compact starter is a universal motor feeder that meets the requirements
of IEC / EN 60947-6-2 (weld-free). It combines the functions of a circuit breaker, a solid-state
overload relay and a contactor within a single housing and can be used in any application
involving the direct starting of standard induction motors with a rating of up to 32 A
(approx. 15 kW/400 V).
The compact starter is available as either a direct or a reversing starter.
As an option, an AS-i mounting module can be mounted on the compact starter with a 24 V
control voltage. The AS-i mounting module enables the compact starter to communicate via
an AS-Interface.
Table 3-1 Compact starter communication options
Compact starter Communication
Compact starter without optional AS-i mounting module No communication
Compact starter (24 V) with optional AS-i mounting
module
3
Communication via AS-Interface
Setting ranges
The compact starter is available with five different current setting ranges and three different
control voltage ranges. For details of the corresponding compact starter order numbers,
please refer to "
● Current setting ranges:
0.1 to 0.4 A
0.32 to 1.25 A
1 to 4 A
3 to 12 A
8 to 32 A
● Control voltage ranges (AC/DC):
24 V
42 to 70 V
110 to 240 V
3.2.2 System configuration with optional AS-i mounting module
The compact starter with 24 V control voltage can be controlled via an AS-Interface. The
actuator sensor interface (AS-Interface) is a modular networking system for sensors and
actuators at the lowest field level.
Configuration
If the AS-Interface is being used for control purposes, the AS-i mounting module needs to be
installed on the compact starter (24 V) instead of the two auxiliary circuit terminals. The AS-i
and auxiliary voltage cables are connected to the AS-i mounting module.
An AS-i power supply is used to feed the AS-i voltage into the AS-i cable, which also serves
as a communication cable between the AS-i master and slave. The auxiliary voltage is
supplied by a 24 VDC PELV power supply in accordance with VDE 0106 safety class III.
For additional information on the AS-Interface, please refer to the manual entitled
"AS-Interface System"
(order number: 3RK2703-3AB02-1AA1).
For additional information on connecting the AS-i mounting module, please refer
Connecting the compact starter (24 V) with optional AS-i mounting modul
The module can be installed horizontally (i.e. on a vertically installed DIN rail) or vertically
(i.e. on a horizontally installed DIN rail).
Safe isolation
The following limit values must be observed to ensure safe isolation of the compact starters
in accordance with IEC / EN 60947-1:
● Control circuit to internal auxiliary circuit: 250 V
● Internal auxiliary/control circuit to internal auxiliary/control circuit: 250 V
● Internal auxiliary/control circuit to external auxiliary circuit: 400 V
● Main circuit to internal auxiliary/control circuit: 400 V
● Main circuit to external auxiliary circuit: 400 V
4
In order for the "safe isolation" of circuits to be achieved, an individual fault must not be able
to trigger a voltage overspill from one circuit into another. The kinds of fault to be taken into
account include twisted or loose conductive parts, twisted solder pins, broken winding wire,
missing screws or broken barriers within a device.
Cabinet types
The system can be installed inside a central control cabinet or a distributed control box.
The compact starter has a rated ultimate short-circuit breaking capacity ICU of 53 kA at
400 V. If the short-circuit current at the installation point exceeds the compact starter's
specified rated ultimate short-circuit breaking capacity, then you will need to use a backup
fuse. It is also possible to install an upstream circuit breaker with limiter function.
Combining compact starters with SIRIUS circuit breakers
The compact starter's connecting terminals are compatible with size S0 circuit breakers from
the SIRIUS 3RV range.
Distance from neighboring components
When installing compact starters, the following distances from grounded or live parts and
from neighboring components must be observed in accordance with IEC / EN 60947-6-2.
● Lateral distance from grounded parts: 10 mm
● Arcing space, top and bottom: 30 mm
!
!
!
!
Figure 4-1 Distance of compact starter from neighboring components (dimensions in mm)
The following supply options are available for the compact starter's main circuit:
● Infeed via parallel wiring of individual compact starters
● Infeed via SIRIUS infeed system for 3RA6
● Infeed via 3-phase bus bars
● Infeed via 8US busbar adapter
If the creepages and clearances specified by UL 508 also need to be observed, then special
infeed terminals are available for the relevant infeed systems.
According to UL 508, these infeed terminals are not required for MSP (Manual Starter
Protector).
4.2.1 SIRIUS infeed system for 3RA6
Maximum rated current
The following maximum rated currents apply to the components of the SIRIUS infeed
system for 3RA6:
Table 4-2 Maximum rated current (infeed system for 3RA6)
Components Order number Max rated current I
Left infeed, 50/70 mm² screw terminal with
three slots, outgoing terminals with screw-type
connection technology, incl. PE bar
Left infeed, 50/70 mm² screw terminal with
three slots, outgoing terminals with springloaded connection technology, incl. PE bar
Left infeed, 25/35 mm² screw terminal with
three slots, outgoing terminals with screw-type
connection technology, incl. PE bar
Left infeed, 25/35 mm² screw terminal with
three slots, outgoing terminals with springloaded connection technology, incl. PE bar
Left or right infeed, 25/35 mm², with springloaded connection technology