Siemens SIRIUS Instruction sheet

Load Feeder
Configuring SIRIUS Innovations
Selection data for Fuseless and Fused Load Feeders
Configuration Manual •04/2010
Industrial Controls
Answers for industry.

Industrial switchgear
Load feeders
Configuring SIRIUS Innovations
Configuration Manual
04/2010
A8E56203880102-02
Introduction 1
General information
2
Selection tables 400 V AC
3
Selection tables 500 V AC
4
Fused selection tables up to
690 V
5
Installation guidelines
6
Service and support
7

Legal information
Warning notice system
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 product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation for the specific task, in particular its warning notices and
safety instructions. Qualified personnel are those who, based on their training and experience, are capable of
identifying risks and avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be adhered to. The information in the relevant documentation must be observed.
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
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
Order number: 3ZX1012-0RA21-1AC0
Ⓟ 04/2010
Copyright © Siemens AG 2009,
2010.
Technical data subject to change

Configuring SIRIUS Innovations
Configuration Manual, 04/2010, A8E56203880102-02 5
Table of contents
1 Introduction................................................................................................................................................ 7
2 General information ................................................................................................................................. 11
3 Selection tables 400 V AC ....................................................................................................................... 23
3.1 Motor starter protector + contactor ..............................................................................................23
3.2 Circuit breaker + contactor + thermal overload relay...................................................................27
3.3 Circuit breaker + contactor + 3RB3 solid-state overload relay ....................................................31
3.4 Circuit breaker + contactor + 3RB22 or 3RB23 solid-state overload relay, and 3UF7................34
3.5 Motor starter protector + solid-state contactor.............................................................................40
3.6 Motor starter protector + solid-state reversing contactor.............................................................42
3.7 Motor starter protector + star (wye)-delta starting + 3RU21 thermal overload relay ...................44
3.8 Motor starter protector + contactor assembly for star-delta start + 3RB22 / 23 / 3 solid-
state overload relay, or 3UF7.......................................................................................................45
3.9 Motor starter protector + 3RW30 soft starter ...............................................................................47
3.10 Motor starter protector + 3RW40 soft starter ...............................................................................48
3.11 Motor starter protector + 3RW44 soft starter ...............................................................................49
4 Selection tables 500 V AC ....................................................................................................................... 51
4.1 Motor starter protector + contactor ..............................................................................................51
4.2 Motor starter protector + contactor + thermal overload relay ......................................................55
4.3 Motor starter protector + contactor + 3RB3 solid-state overload relay........................................59
4.4 Motor starter protector + contactor + 3RB22, 3RB23 solid-state overload relay, or 3UF7..........63
4.5 Motor starter protector + contactor assembly for star-delta start + 3RU21 thermal
overload relay...............................................................................................................................66
4.6 Motor starter protector + contactor assembly for star-delta start + 3RB22 / 23 / 3 solid-
state overload relay, or 3UF7.......................................................................................................67
4.7 Motor starter protector + 3RW40 soft starter ...............................................................................69
4.8 Motor starter protector + 3RW44 soft starter ...............................................................................70
5 Fused selection tables up to 690 V.......................................................................................................... 71
5.1 Contactor short-circuit protection.................................................................................................71
5.2 Short-circuit protection: Contactor + 3RU2 thermal overload relay, type of coordination 1
and 2 ............................................................................................................................................72
5.3 Short-circuit protection: Contactor + 3RB3 solid-state overload relay.........................................74
5.4 Short-circuit protection: Contactor + 3UF7 + 3RB22 / 23 solid-state overload relay...................78
5.5 Short-circuit protection: Contactor + 3RR2 monitoring relay, type of coordination 1 and 2 ........82
5.6 Short-circuit protection: Star-delta (wye-delta) contactor ............................................................83

Table of contents
Configuring SIRIUS Innovations
6 Configuration Manual, 04/2010, A8E56203880102-02
5.7 Short-circuit protection: Soft starter + 3RU2 thermal overload relay .......................................... 85
5.8 Short-circuit protection: Solid-state contactor, type of coordination 1 and 2 .............................. 86
5.9 Short-circuit protection: Motor feeders with 3RW3 + 3RT + 3RB30/3RB31 ............................... 87
5.10 Contactor assemblies for star-delta (wye-delta) start + 3RB30/31 solid-state overload
relay and 3RT20 contactor.......................................................................................................... 88
5.11 Contactor assemblies for star-delta (wye-delta) start + 3UF7 solid-state overload relay
and 3RT20 contactor................................................................................................................... 89
6 Installation guidelines .............................................................................................................................. 91
7 Service and support................................................................................................................................. 95

Configuring SIRIUS Innovations
Configuration Manual, 04/2010, A8E56203880102-02 7
Introduction 1
SIRIUS – the modular system family for switching, protecting and starting motors
The innovations in the SIRIUS modular system family represent a totally new switchgear
generation up to 18.5 kW. They are based on the existing SIRIUS modular system family,
which has been systematically optimized and extended with many new functions. The
individual switching devices, each of which is available with screw or spring-loaded
terminals, can be easily assembled to form complete load feeders, either using link modules
or by mounting directly.
Size
Function Components S00 S0
Contactors
Semiconductor
switching devices
Switching
and starting
Soft starters
Motor starter
protectors
Protecting
Overload relays
Monitoring Current monitoring
relays
Main circuit
Feeders Feeders

Introduction
Configuring SIRIUS Innovations
8 Configuration Manual, 04/2010, A8E56203880102-02
Size
Function Components S00 S0
Compact starters
Function modules for
mounting on
contactors
Control circuit
Function modules for
connection to the
automation level

Introduction
Configuring SIRIUS Innovations
Configuration Manual, 04/2010, A8E56203880102-02 9
Highlights
•Load feeders: Completely new series up to 18.5 kW / 400 V
•Comprehensive variety of starter technologies:
electromechanical, semiconductors, soft starters
•Short-circuit breaking capacity up to 150 kA
•Modular design: Coordiated components ensure combinability
•Variants and sizes: Economical and flexible with 2 sizes and a broader
performance range
•Accessories: Optimum variance with uniform accessories
•Type of construction: Space-saving design with small device width and butt-
mounting type of construction up to 60°C
•Setup: Fast startup, short setting-up times, and simple wiring
•Communication: Optional connection to AS-Interface or IO-Link with
function modules
•Maintenance: Extremely durable, low maintenance, and reliable
•Approvals: Global approvals and certifications, such as UL, CSA,
CCC, shipbuilding ...
•Mounting: Permanently secure mounting, screw or snap fitting
•Spring-loaded
connection
technology:
Quick and secure connection, vibration-proof, and
maintenance-free
•Environment: Environment friendly production and materials, recycling
capability, low power loss
•Design: Clear-cut, ergonomic design (winner of the iF Product
Design Award)

Introduction
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10 Configuration Manual, 04/2010, A8E56203880102-02

Configuring SIRIUS Innovations
Configuration Manual, 04/2010, A8E56203880102-02 11
General information 2
General criteria for the selection of devices
The motor starter protectors, contactors, solid-state switching devices, soft starters and
overload relays in the following tables are all specified in their basic versions with screw
terminals, i.e. (in particular) without accessories. Where available, of course, versions with
spring-loaded terminals or ring cable lug connections as well as accessories such as
auxiliary switches, auxiliary trip units etc. can be used.
The contactors listed have a rated control supply voltage
U
s of 230 V AC, 50 Hz. Versions
with other voltages can also be used.
The 3RU21 thermal overload relay and the 3RB30 / 3RB31 solid-state overload relays can
be directly mounted onto the contactor. The 3RB22 / 3RB23 solid-state overload relay and
the SIMOCODE pro 3UF7 motor protection and control device are essentially used for stand-
alone installation. In their basic version, these devices are specified with a rated control
supply voltage of 230 V AC.
Mounting the combinations
When mounting the devices, specific arcing spaces must be maintained so that short-circuits
can be cleared safely and reliably. The appropriate installation guidelines can be found in
Section Installation guidelines (Page 91).
The technical data of the individual devices must be taken into account when selecting a
device.
400 V AC / 500 V
The tables below are primarily structured for the 400 V and 500 V line voltages for grounded
networks (at 50 and 60 Hz) generally found in IEC regions. The coordination tables for 690 V
will follow.
Tests are carried out with a test voltage which lies 10% above these values (further details
can be found in the test reports). Thus, the specified combinations can also be used for other
networks as long as their maximum voltage does not exceed the test voltage. This means,
for instance, the combinations for 400 V can also be used for 415 V networks that have a
line supply tolerance of +5%.

General information
Configuring SIRIUS Innovations
12 Configuration Manual, 04/2010, A8E56203880102-02
Ambient conditions
A maximum ambient temperature of 60°C applies to all electromechanical controlgear, and
40°C to soft starters and solid-state contactors. Higher temperatures are possible with
derating. For details, refer to the System Manual or contact Technical Assistance.
A maximum installation height of 2000 m applies to electromechanical controlgear, and
1000 m to soft starters and solid-state contactors.
Higher installation altitudes are also possible with derating. For details refer to the
appropriate manuals.
Trip classes
CLASS 5, CLASS 10, CLASS 20, CLASS 30 and CLASS 40
Trip classes, according to IEC 60947-4-1, define the time intervals within which the
protection equipment (overload release of a motor starter protector or overload relay) must
trip from the cold state, for a symmetrical, three-phase load with a 7.2-fold set current
I
e.
The tripping times are as follows:
● CLASS 5 and CLASS 10 between 2 s and 10 s,
● CLASS 20 between 4 s and 20 s,
● CLASS 30 between 9 s and 30 s,
● CLASS 40 between 30 s and 40 s.
120
100
50
20
10
5
2
1
50
20
10
5
2
125
10x
e
s
0,6
CLASS 30
25
20
15
10
CLASS 5
Tripping time
Tripping current (mean values)
min
In practice, devices with trip CLASS 5 and CLASS 10 are generally used. These devices are
designed for standard applications. CLASS 5 and CLASS 10 are often referred to as normal
starting.
Combinations for CLASS 20, CLASS 30 and CLASS 40 are available for applications where
a higher starting current is required for a prolonged period. In this case, using standard
devices of CLASS 5 and CLASS 10 would result in unwanted tripping. CLASS 20, CLASS 30
and CLASS 40 are also known as heavy starting devices. Large fan motors are an example
of this type of application.
As well as the overload protection devices, the contactors and short-circuit protection
devices must also be designed for these long starting times. This is why combinations acc.
to CLASS 5 and CLASS 10 are generally more cost-effective. CLASS 20, CLASS 30 and
CLASS 40 are only generally used if genuinely necessitated by the application.

General information
Configuring SIRIUS Innovations
Configuration Manual, 04/2010, A8E56203880102-02 13
Type of coordination 1 or 2
When selecting the combinations, in many cases, either coordination type 1 or 2 can be
selected. According to IEC 60947-4-1, the coordination type defines the permissible degree
of damage for a device following a short-circuit.
•Type of coordination 1:
After a short-circuit, it is permissible for the starter to be inoperative, in particular, damage to the
contactor, solid-state switching devices and overload relay is permissible.
•Type of coordination 2:
The starter is still operative. There must be no signs of damage to the devices, with the exception
of slightly welded contactor contacts if these can be easily separated again without any noticeable
deformation.
In both cases, the short-circuit is reliably and safely cleared. Combinations of coordination
type 2 are therefore of a higher quality and are rapidly available for reuse after a short-circuit.
In the case of solid-state switching devices, the same applies as for type of coordination 2,
that the short-circuit is cleared without any damage to the power semiconductors.
Combinations of coordination type 1 are generally the more favorably priced solution.
Combinations of coordination type 2 automatically fulfill the requirements of coordination
type 1.
Tests
All of the specified combinations are tested in compliance with IEC 60947-4-1.

General information
Configuring SIRIUS Innovations
14 Configuration Manual, 04/2010, A8E56203880102-02
With or without overload relay
In addition to the combinations comprising a motor starter protector (for motor protection)
and contactor, combinations are also available with motor starter protector (for starter
protection), contactor and overload relay.
In the first case, the motor starter protector assumes the dual function of overload protection
and short-circuit protection, while in the second case, the motor starter protector assumes
only the short-circuit protection function and the overload relay the overload protection
function. The tripping behavior of both solutions under overload and short-circuit conditions
is technically comparable.
For fuseless load feeders with solid-state overload relay, and for higher trip classes, CLASS
20, CLASS 30 and CLASS 40 in particular, a motor starter protector is often used instead of
an MSP for starter combinations. This is due to the following: from the point of view of
thermal destruction limits, MSPs for starter combinations are generally designed for CLASS
10 motor starts. The current measurement of solid-state overload relays usually moves into
saturation upwards of a 10-fold rated current, so that the intrinsic protection of the motor
starter protector is no longer guaranteed for higher trip classes. In order to ensure thermal
intrinsic protection, it is advisable to use a motor starter protector/circuit breaker that protects
itself over the overload release. The motor starter protector/circuit breaker is selected so that
the point at which the characteristic curve of the overload relay intersects with the a-tripping
characteristic of the motor starter protector/circuit breaker is more than 10 x the set current.
This ensures that, in the case of motor faults, such as overload or blocking, the overload
relay always trips and not the motor starter protector.
In this situation, combinations with motor starter protector and contactor offer the most cost-
effective solution. However, combinations with overload relays offer distinct advantages for
certain applications:
● 3RB30 / 3RB31 and 3RB22 / 3RB23 solid-state overload relays or SIMOCODE pro 3UF7
can be used to achieve not only trip CLASS 5 and CLASS 10 but also solutions for heavy
starting, such as CLASS 20, CLASS 30, and CLASS 40.
● Using solid-state overload relays offers a wide setting range of 1:4 or 1:10. This offers
advantages during configuration (e.g. if the exact motor current is not known) and
enables us to reduce the number of variants required.
● Overload and short-circuit protection are carried out separately and can also be signaled
separately. Alternatively, the 3RV2921-1M signaling block can be used for the 3RV motor
starter protector instead of the overload relay. This also supports the separate signaling
of overloads and short-circuits.
● Setting of the overload relay to "Automatic Reset" can also save a walk to the control
cabinet in the case of overload tripping, as a manual reset in the control cabinet is not
required. Alternatively, this function can also be implemented with the "3RV21 motor
starter protector with overload relay function". These devices can be used in the motor
starter protector + contactor tables instead of the 3RV20 motor starter protector.

General information
Configuring SIRIUS Innovations
Configuration Manual, 04/2010, A8E56203880102-02 15
Star(wye)(Y)-delta function(Δ) starting
In order to keep the current peaks in the line supply as low as possible, contactor assembly
are frequently used as star(wye)-delta starters to start three-phase motors. However, to
make worthwhile use of YΔ starting, a low load torque is required during starting. Only then
can the motor approximately reach its rated speed in the Y stage before switching to
Δ operation.
An overload relay should be used for motor overload protection. Normally, this is located
directly in the motor feeder cable U1, V1, W1, as shown in the circuit diagram. Using this
arrangement, the overload protection is effective in both the Y and Δ circuit. The overload
relay should be set for 58% of the rated motor current.
K1
N
K2
6
1 3 5
2 4 6
K3
1 3 5
2 4 6
F1
NSB0_01770
W1
V1
U1
W2
V2
U2
M
3~
24
5
13
>>>
L1
L2
L3
Q1
Circuit diagram main circuit for circuit
The control current wiring and switching from Y to Δ are implemented with plug-on function
modules for the SIRIUS innovations. The switching time can be set between 1 and 100 s.
The function modules thus perform the function of the timing relay.
In the tables, circuit breakers are used for starter combinations (without overload releases).
However, 3RV20 motor starter protectors for motor protection with the same rated current
can also be used instead. In this case, the rated motor current of the motor starter protector
must be set to the maximum value. This prevents a simultaneous tripping of the motor starter
protector and overload relay.

General information
Configuring SIRIUS Innovations
16 Configuration Manual, 04/2010, A8E56203880102-02
Soft starting with soft starters
What is the basic principle of a soft starter?
Soft starters limit the starting current and starting torque. This reliably prevents mechanical
stress and mains voltage dips. The motor voltage is reduced using phase control and is
increased from an adjustable starting voltage up to the mains voltage within a specific ramp
time. Soft starting and stopping reduces the stress on connected equipment, thus ensuring
prolonged smooth and trouble-free production.
M
3 ~
3ULQFLSOHRIWKHRSHUDWLQJDQJOH
RIWKHPDLQVYROWDJHIRU
VROLGVWDWHHOHPHQWVLQVRIW
VWDUWHUV
100%
58%
U
tnerrucrotoMegatlovrotoM
2SHUDWLQJDQJOH
N
Direct
starting
Soft
starter
Direct
starting
Wye-
delta
Soft
starter
Ramp
time
Time
Wye-
delta
M
M
M
Motor torque
Direct
starting
Wye-
delta
Soft
starter
M
Rotat.
speed
N
n
N
NSB0_01999
Rotat.
speed
n
N
U
L1 L2 L3
G1
L1- L 3
L1- L 3
● 3RW30 soft starters for the soft starting of three-phase asynchronous motors for simple
applications
– performance range: up to 55 kW at 400 V (75 hp at 460 V)
● 3RW40 soft starters with integrated functions; solid-state motor overload and intrinsic
device protection and adjustable current limiting
– performance range: up to 250 kW at 400 V (300 hp at 460 V)
● The 3RW44 solid-state soft starters offer the following:
– soft starting and stopping
– solid-state motor overload and intrinsic device protection
– adjustable current limiting
– numerous functions for higher-level requirements
– performance range:
up to 710 kW at 400 V in standard circuit
up to 1200 kW at 400 V (1700 hp at 460 V) in the inside-delta circuit
Further information can be found in the Internet at: http://www.siemens.de/sanftstarter
(http://www.siemens.de/sanftstarter).
For optimum configurations, we recommend using the selection and simulation program
"Win-Soft Starter". You can order or download under:
http://www.siemens.de/lowvoltage/demosoftware
(http://www.siemens.de/lowvoltage/demosoftware)
(Order Number: E20001-D1020-P302-V2-7400)

General information
Configuring SIRIUS Innovations
Configuration Manual, 04/2010, A8E56203880102-02 17
Load feeders with soft starters
Soft starters can also be used to prevent current peaks in the line supply instead of the
star(wye)-delta starting combinations. Three versions of these soft starters are available:
● 3RW30
● 3RW40
● 3RW44
The 3RW4 soft starters come as standard with an integrated solid-state overload relay. This
means that, in fuseless combinations, a motor starter protector is only required for short-
circuit protection. In the case of 3RW30 soft starters, the motor starter protector must also
cover the overload protection.
3RB22 / 23 overload relays and SIMOCODE pro
The modular, solid-state overload relays with external power supply type 3RB22 / 23 for
high-feature applications up to 630 A have been designed for inverse-time delayed
protection of loads with normal and heavy starting against excessive temperature rises due
to overload, phase unbalance or phase failure.
SIMOCODE pro is a flexible, modular motor management system for motors with constant
speeds in the low-voltage performance range. It provides the intelligent, communication-
capable interface between the higher-level automation system and the motor feeder.
A configuration with 3RB22 / 23 overload relays and with SIMOCODE pro requires in each
case a basic unit, a connection cable and a current measuring module. The MLFBs of the
current measuring modules are listed in the tables. Details of the basic units and connection
cables are given in the following:
3RB22 / 23
● Basic unit (= evaluation module)
– Monostable, screw: 3RB2283-4AA1
– Bistable, screw: 3RB2383-4AA1
– Monostable, spring-loaded: 3RB2283-4AC1
– Bistable, spring-loaded: 3RB2383-4AC1
● Connection cable
– 0.1 m (S00-S3): 3RB2987-2B
– 0.5 m (S00-S12): 3RB2987-2D
● For other accessories for 3RB22 / 23 overload relays see Catalog LV 1 Chapter 5.

General information
Configuring SIRIUS Innovations
18 Configuration Manual, 04/2010, A8E56203880102-02
SIMOCODE pro
● SIMOCODE pro C, Basic Unit 1
PROFIBUS DP interface, 12 Mbit/s, RS485 4I / 3O freely assignable, input for thermistor
connection, monostable relay outputs
– 24 V DC: 3UF7000-1AB00-0
– 110 ... 240 V AC / DC: 3UF7000-1AU00-0
● SIMOCODE pro V, Basic Unit 2
PROFIBUS DP interface, 12 Mbit/s, RS485 4I / 3O freely assignable, input for thermistor
connection, monostable relay outputs, can be expanded by expansion modules
– 24 V DC: 3UF7010-1AB00-0
– 110 ... 240 V AC / DC: 3UF7010-1AU00-0
● Connection cable
– 0.1 m, flat: 3UF7931-0AA00-0
– 0.3 m, flat: 3UF7935-0AA00-0
– 0.5 m, flat: 3UF7932-0AA00-0
– 0.5 m, round: 3UF7932-0BA00-0
– 1.0 m, round: 3UF7937-0BA00-0
– 2.5 m, round: 3UF7933-0BA00-0
● For other accessories and software for SIMOCODE pro see Catalog LV 1 Chapter 7.

General information
Configuring SIRIUS Innovations
Configuration Manual, 04/2010, A8E56203880102-02 19
Link modules
Table 2- 1 Link module versions
Connection
system
Link module version Order number
Motor starter protector – contactor in size S00 3RA1921-1D
Motor starter protector – contactor in size S0 AC 3RA2921-1A
Motor starter protector – contactor in size S0 DC
Motor starter protector – soft starter in size S00
Motor starter protector – soft starter in size S0
Screw-type
connection
system
Motor starter protector – solid-state contactor
3RA2921-1B

General information
Configuring SIRIUS Innovations
20 Configuration Manual, 04/2010, A8E56203880102-02
Connection
system
Link module version Order number
Motor starter protector – contactor in size S00 3RA2911-2A
Motor starter protector – contactor in size S0 3RA2921-2A
Motor starter protector – soft starter in size S00 3RA2911-2G
Spring-
loaded
connection
system
Motor starter protector – soft starter in size S0 3RA2921-2G