4

© Siemens AG 2010

Controls – Soft Starters

and Solid-State Switching
Devices

Price Groups Solid-State Switching Devices

PG 101, 131, 191 for Switching Motors neu
Solid-State Contactors
4/2 Introduction
4/103 General data
SIRIUS 3RW Soft Starters 4/106 SIRIUS 3RF34 solid-state contactors,
4/5 General data three-phase
3RW30, 3RW40 4/109 SIRIUS 3RF34 solid-state reversing
for Standard Applications contactors, three-phase
4/8 3RW30
More technical information
4/18 3RW40

4
can be found at
3RW44
www.siemens.com/industrial-
for High-Feature Applications controls/support
4/34 3RW44
under Product List:
Solid-State Switching Devices - Technical specifications
for Resistive Loads under Entry List:
4/62 General data - Updates
- Downloads
Solid-State Relays - FAQ
4/65 General data - Manuals
4/66 SIRIUS 3RF21 solid-state relays, - Characteristics
- Certificates
single-phase, 22.5 mm
4/71 SIRIUS 3RF20 solid-state relays, and at
single-phase, 45 mm www.siemens.com/industrial-
controls/configurators
4/74 SIRIUS 3RF22 solid-state relays,
- Configurators
three-phase, 45 mm
Solid-State Contactors
4/77 General data Note:
4/78 SIRIUS 3RF23 solid-state contactors, The 3RF24 solid-state contactors
single-phase for switching motors can be found
4/87 SIRIUS 3RF24 solid-state contactors, - In the catalog Add-On LV 1 AO · 2011
three-phase in the CD/DVD box
3RF2 Function Modules - In the catalog Add-On LV 1 AO · 2011
at the Information and Download
4/91 General data Center
4/98 SIRIUS converters for 3RF2 - In the interactive catalog CA 01
4/99 SIRIUS load monitoring for 3RF2 - In the Industry Mall
4/100 SIRIUS heating current monitoring for
3RF2
4/101 SIRIUS power controllers for 3RF2
4/102 SIRIUS power regulators for 3RF2

Siemens IC 10 · 2011
 © Siemens AG 2010

Controls — Soft Starters and Solid-State Switching Devices

Introduction

■ Overview

3RW30 3RW40 3RW44

Order No. Page
4

3RW soft starters

3RW soft starters for Standard applications
3RW30 soft starters • SIRIUS 3RW30 soft starters for soft starting of three-phase asynchronous 3RW30 4/8
motors
• Performance range of up to 55 kW (at 400 V)
3RW40 soft starters • SIRIUS 3RW40 soft starters with the integral functions 3RW40 4/18
- Solid-state motor overload and intrinsic device protection and
- Adjustable current limiting
for the soft starting and stopping of three-phase asynchronous motors
• Performance range of up to 250 kW (at 400 V)
3RW soft starters for High-Feature applications
3RW44 soft starters • In addition to soft starting and soft ramp-down, the SIRIUS 3RW44 solid-state 3RW44 4/34
soft starters provide numerous functions for higher-level requirements
• Performance range
- Up to 710 kW (at 400 V) in inline circuit and
- Up to 1200 kW (at 400 V) in inside-delta circuit

SIRIUS 3RW soft starters

SIRIUS 3RW soft starters permit soft starting and smooth ramp-
down of three-phase asynchronous motors. Depending on the
scope of functions required it is possible to choose between:
• Soft starters for Standard applications
• Soft starters for High-Feature applications
SIRIUS 3RW – Service-proven in many applications
Functions of the SIRIUS soft starters include:
• Soft starting and smooth ramp-down
• Stepless starting
• Torque control and limitation
Cost-efficient operation
The advantages of SIRIUS soft starters at a glance:
• Reduction of current peaks
• Avoidance of mains voltage fluctuations during starting
• Reduced load on the power supply network
• Reduction of the mechanical load in the operating mechanism
• Considerable space savings and reduced wiring compared
with conventional starters
• Maintenance-free switching
• Very easy handling
• Fits perfectly in the SIRIUS modular system

4/2 Siemens IC 10 · 2011

 © Siemens AG 2010

Controls — Soft Starters and Solid-State Switching Devices

Introduction

3RF21 3RF20 3RF22 3RF23 3RF24 3RF29 3RF34 (motor)

Order No. Page

4
SIRIUS solid-state switching devices for switching resistive loads
Solid-state relays
Solid-state relays • Widths of 22.5 mm and 45 mm 3RF21 4/66
• Compact and space-saving design 3RF20 4/71
3RF22 4/74
• "Zero-point switching" version
• Mounting onto existing heat sinks
Solid-state contactors
Solid-state contactors • Complete units comprising a solid-state relay and an optimized heat sink, 3RF23 4/78
"ready to use" 3RF24 4/87
• Compact and space-saving design
• Versions for resistive loads "zero-point switching"
and inductive loads "instantaneous switching"
• Special versions "Low Noise" and "Short-Circuit Proof"
Function modules For extending the functionality of the 3RF21 solid-state relays and the 3RF23
solid-state contactors for many different applications:
Converters • For converting an analog input signal into an on/off ratio; 3RF29 00-0EA18 4/98
can also be used on 3RF22 and 3RF24 three-phase switching devices
Load monitoring • For load monitoring of one or more loads (partial loads) 3RF29 ..-0FA08, 4/99
3RF29 .0-0GA..
Heating current monitoring • For load monitoring of one or more loads (partial loads); 3RF29 ..-0JA.. 4/100
remote teach
Power • For supplying the current by means of a solid-state switching device 3RF29 ..-0KA. 4/101
controllers depending on a setpoint value.
There is a choice of full-wave control and generalized phase control.
Power regulators • For supplying the current by means of a solid-state switching device 3RF29 .0-0HA.. 4/102
depending on a setpoint value.
Closed-loop control: full-wave control or generalized phase control
SIRIUS solid-state switching devices for switching motors
Solid-state contactors
Solid-state contactors, • Complete units in the insulated enclosure with integrated heat sink, 3RF34 4/106
solid-state reversing contactors "ready to use" 3RF34 4/109
• Compact and space-saving design
• Version for motors, "instantaneous switching"

Siemens IC 10 · 2011 4/3

 © Siemens AG 2010

Controls — Soft Starters and Solid-State Switching Devices

Introduction
SIRIUS 3RF solid-state switching devices The HCS300I is a modular heating control system for the optimi-
zation of plastic processing machines. It enables individual so-
lutions for many different heating control applications. With each
basic unit it is possible to use up to four 6-channel digital outputs
to control solid-state switching devices and four 4-channel tem-
perature measuring modules. Current or current-and-voltage
measuring modules can be used to monitor the loads.
Communication with the higher-level control system is through
Profibus DP.
See also www.siemens.com/heating-control
4

Three-phase solid-state contactor and single-phase solid-state relay

The SIRIUS 3RF solid-state switching devices reliably switch a
wide range of different loads with alternating voltages in 50 and
60 Hz systems.
3RF2 solid-state switching devices for resistive loads
• Solid-state relays
• Solid-state contactors SIPLUS heating controls
• Function modules
SIRIUS 3RF3 – for switching motors
3RF3 solid-state switching devices for switching motors
In order to achieve higher productivity, the switching frequency
• Solid-state contactors is continuously increased. It is no problem for our SIRIUS solid-
• Solid-state reversing contactors state contactors to switch motors. With induction motors up to
7.5 kW, they can reliably withstand even the highest switching
SIRIUS 3RF2 – for almost unending activity frequencies. Even a continuous change in the direction of rota-
Conventional electromechanical controlgear is often overtaxed tion is possible with the solid-state reversing contactors. Both
by the rise in the number of switching operations. A high switch- versions can be perfectly combined with components from the
ing frequency results in frequent failure and short replacement SIRIUS modular system. Connecting with SIRIUS motor starter
cycles. However, this does not have to be the case, because protectors or SIRIUS overload relay can be implemented without
with the latest generation of our SIRIUS 3RF2 solid-state switch- any further steps.
ing devices we provide you with solid-state relays and contac- Always on the sunny side with SIRIUS
tors with a particularly long endurance – for almost unending ac-
tivity even under the toughest conditions and under high Because SIRIUS 3RF2 offers even more:
mechanical load, but also in noise-sensitive areas. • The space-saving and compact side-by-side mounting ensure
Proved time and again in service reliable operation up to an ambient temperature of +60 °C.
• Thanks to fast configuration and the ease of mounting and
SIRIUS 3RF2 solid-state switching devices have firmly estab- start-up, you save not only time but also expenses.
lished in industrial applications. They are used above all in ap-
plications where loads are switched frequently – mainly with re- Connection methods
sistive load controllers, with the control of electrical heat or the
control of valves and motors in conveyor systems. In addition to The solid-state switching devices are available with screw termi-
its use in areas with high switching frequencies, their silent nals (box terminals), spring-type terminals or ring terminal lugs.
switching means that SIRIUS is also ideally suited for use in
noise-sensitive areas, such as offices or hospitals. Screw terminals
The most reliable solution for any application
Compared to mechanical controlgear, our SIRIUS 3RF2 solid- Spring-type terminals
state switching devices stand out due to their considerably lon-
ger service life. Thanks to the high product quality, their switch- Ring terminal lug connections
ing is extremely precise, reliable and, above all, insusceptible to
faults. With its variable connection methods and a wide spread
of control voltages, the SIRIUS 3RF2 family is universally appli- The terminals are indicated in the corresponding ta-
cable. Depending on the individual requirements of the applica- bles by the symbols shown on orange backgrounds.
tion, our modular controlgear can also be quite easily expanded
by the addition of standardized function modules.
Ideal for operation with heating control systems
The 3RF2 solid-state switching devices can be used for example
in the SIPLUS HCS300I heating control system. They are opti-
mally connected to the digital output module of the HCS300I by
means of preassembled cables. This saves considerable wiring
outlay in the control circuit and shortens mounting time.

4/4 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

General data

■ Overview

SIRIUS 3RW30 SIRIUS 3RW40 SIRIUS 3RW44

Standard applications Standard applications High-Feature applications

4
Rated current at 40 °C A 3 ... 106 12.5 ... 432 29 ... 1214
Rated operational voltage V 200 ... 480 200 ... 600 200 ... 690
Motor rating at 400 V
• Inline circuit kW 1.5 ... 55 5.5 ... 250 15 ... 710
• Inside-delta circuit kW -- -- 22 ... 1 200
Ambient temperature °C -25 ... +60 -25 ... +60 0 ... +60
Soft starting/ramp-down ✓1) ✓ ✓
Voltage ramp ✓ ✓ ✓
Starting/stopping voltage % 40 ... 100 40 ... 100 20 ... 100
Starting and ramp-down time s 0 ... 201) 0 ... 20 1 ... 360
Torque control -- -- ✓
Starting/stopping torque % -- -- 20 ... 100
Torque limit % -- -- 20 ... 200
Ramp time s -- -- 1 ... 360
Integral bypass contact system ✓ ✓ ✓
Intrinsic device protection -- ✓ ✓
Motor overload protection -- ✓7) ✓
Thermistor motor protection -- ✓2) ✓
Integrated remote RESET -- ✓3) ✓
Adjustable current limiting -- ✓ ✓
Inside-delta circuit -- -- ✓
Breakaway pulse -- -- ✓
Creep speed in both directions of rotation -- -- ✓
Pump ramp-down -- -- ✓4)
DC braking -- -- ✓4) 5)
Combined braking -- -- ✓4) 5)
Motor heating -- -- ✓
Communication -- -- With PROFIBUS DP (optional)
External display and operator module -- -- (optional)
Operating measured value display -- -- ✓
Error logbook -- -- ✓
Event list -- -- ✓
Slave pointer function -- -- ✓
Trace function -- -- ✓6)
Programmable control inputs and outputs -- -- ✓
Number of parameter sets 1 1 3
Parameterization software (Soft Starter ES) -- -- ✓
Power semiconductors (thyristors) 2 controlled phases 2 controlled phases 3 controlled phases
Screw terminals ✓ ✓ ✓
Spring-type terminals ✓ ✓ ✓
UL/CSA ✓ ✓ ✓
CE marking ✓ ✓ ✓
Soft starting under heavy starting -- -- ✓4)
conditions
Configuring support Win-Soft Starter, electronic selection slider ruler, Technical Assistance ++49 911 895 5900
4)
✓ Function is available. Calculate soft starter and motor with size allowance where required.
5) Not possible in inside-delta circuit.
-- Function not available.
6)
Trace function with Soft Starter ES software.
7)
1)
When using the motor overload protection according to ATEX, an upstream
Only soft starting available for 3RW30. contactor is required.
2) Optional up to size S3 (device variant).
3)
Available for 3RW40 2. to 3RW40 4.; optional for 3RW40 5. and 3RW40 7.. You can find further information on the Internet at:
www.siemens.com/softstarter

Siemens IC 10 · 2011 4/5

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

General data
Selection aid for soft starters

Application SIRIUS 3RW30 SIRIUS 3RW40 SIRIUS 3RW44

Standard applications Standard applications High-Feature applications
4

Normal starting (CLASS 10)

Pumps ● ● ●
Pumps with special pump ramp-down ●
(to prevent water hammer)
Heat pumps ● ● ●
Hydraulic pumps ❍ ● ●
Presses ❍ ● ●
Conveyor belts ❍ ● ●
Roller conveyors ❍ ● ●
Screw conveyors ❍ ● ●
Escalators ● ●
Piston compressors ● ●
Screw compressors ● ●
Small fans1) ● ●
Centrifugal blowers ● ●
Bow thrusters ● ●

Heavy starting (CLASS 20)

Stirrer ❍ ●
Extruders ❍ ●
Lathes ❍ ●
Milling machines ❍ ●

Very heavy starting (CLASS 30)

Large fans2) ●
Circular saws/bandsaws ●
Centrifuge ●
Mills ●
Breakers ●
● Recommended soft starter 1) The mass inertia of the fan is <10 times the mass inertia of the motor.
2)
❍ Possible soft starter The mass inertia of the fan is t10 times the mass inertia of the motor.

Boundary conditions
Type Maximum starting time Current limiting Starts per hour
s % 1/h
Normal starting (CLASS 10)
• 3RW30 3 300 20
• 3RW40/44 10 300 5
Heavy starting (CLASS 20)
• 3RW40 2., 3RW40 3., 3RW40 4. 20 300 5
• 3RW40 5., 3RW40 7., 3RW44 40 350 1
Very heavy starting (CLASS 30)
• 3RW44 60 350 1

The motor ratings listed in the Selection and ordering data are Detailed technical information for a configuration which is
rough guide values. The soft starter should always be designed tailored exactly to the application can be found in the manuals.
on the basis of the required rated operational current of the mo- Siemens recommends the use of the selection and simulation
tor. The 3RW soft starters are designed for easy starting condi- program Win-Soft Starter.
tions. In the event of more exacting requirements, it may be nec-
essary to choose a larger device. However, in some cases the Motor rating data are based on DIN 42973 (kW) and
designed-in safety reserves also permit the listed units to be NEC 96/UL508 (hp).
used in boundary conditions which are slightly more demand-
ing.

4/6 Siemens IC 10 · 2011

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SIRIUS 3RW Soft Starters

General data
Order No. scheme
Digit of the Order No. 1st - 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th
3rd
@@@ @ @ @ @ – @ @ @ @ @ – @ @ @ @
Soft starters 3RW
SIRIUS soft starter generation @ @
Size @
Rated operational current Ie @
Connection type (screw terminals / spring-type terminals) @
Soft starter functionality (bypass, thermistor, etc.) @ @
Rated control supply voltage Us @
Rated operational voltage Ue @

4
Special versions @ @ @ @
Example 3RW 4 0 2 4 – 1 B B 1 4

Note:
The Order No. scheme is presented here merely for information
purposes and for better understanding of the logic behind the
order numbers.
For your orders, please use the order numbers quote in the
catalog in the Selection and ordering data.

■ Benefits
The advantages of the SIRIUS soft starters at a glance: • Reduction of the mechanical load in the operating mechanism
• Soft starting and smooth ramp-down (only soft starting • Considerable space savings and reduced wiring compared
available for 3RW30) with conventional starters
• Stepless starting • Maintenance-free switching
• Reduction of current peaks • Very easy handling
• Avoidance of mains voltage fluctuations during starting • Fits perfectly in the SIRIUS modular system
• Reduced load on the power supply network

■ Technical specifications
Permissible installation altitude

105
NSB0_01704

100
Rated operational current e in %

95
90

85
80

75
70
0 1000 2000 3000 4000 5000
Mounting height in m

At an installation altitude above 2 000 m, the max. permissible

operational voltage is reduced to 460 V.

Siemens IC 10 · 2011 4/7

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW30
the starting operation comes close to the quality of a three-
■ Overview phase controlled soft starter. This is made possible by the on-
The SIRIUS 3RW30 soft starters reduce the motor voltage going dynamic harmonizing and balancing of current half-waves
through variable phase control and increase it in ramp-like mode of different polarity during the motor ramp-up. Hence the name
from a selectable starting voltage up to mains voltage. During "polarity balancing".
starting, these devices limit the torque as well as the current and • Soft starting with voltage ramp; the starting voltage setting
prevent the shocks which arise during direct starts or wye-delta range Us is 40 to 100 % and the ramp time tR can be set from
starts. In this way, mechanical loads and mains voltage dips can 0 to 20 s.
be reliably reduced. • Integrated bypass contact system to minimize power loss
Soft starting reduces the stress on the connected equipment • Setting with two potentiometers
and results in lower wear and therefore longer periods of trouble-
• Simple mounting and commissioning
free production. The selectable start value means that the soft
starters can be adjusted individually to the requirements of the • Mains voltages 50/60 Hz, 200 to 480 V
application in question and unlike wye-delta starters are not re- • Two control voltage versions 24 V AC/DC and 110 to
4

stricted to two-stage starting with fixed voltage ratios. 230 V AC/DC

The SIRIUS 3RW30 soft starters are characterized above all by • Wide temperature range from -25 to +60 °C
their small space requirements. Integrated bypass contacts • The built-in auxiliary contact ensures user-friendly control and
mean that no power loss has to be taken into the bargain at the possible further processing within the system (for status
power semiconductors (thyristors) after the motor has started graphs see page 4/17)
up. This cuts down on heat losses, enabling a more compact de-
sign and making external bypass circuits superfluous.
■ Application
Various versions of the SIRIUS 3RW30 soft starters are available:
The 3RW30 soft starters are suitable for soft starting of three-
• Standard version for fixed-speed three-phase motors, sizes phase asynchronous motors.
S00, S0, S2 and S3, with integrated bypass contact system
• Version for fixed-speed three-phase motors in a 22.5 mm en- Due to two-phase control, the current is kept at minimum values
closure without bypass in all three phases throughout the entire starting time. Due to
continuous voltage influencing, the current and torque peaks
Soft starters rated up to 55 kW (at 400 V) for standard applica- which are unavoidable in the case of wye-delta starters for in-
tions in three-phase networks are available. Extremely small stance do not occur.
sizes, low power losses and simple commissioning are just three
of the many advantages of this soft starter. Application areas

Functionality See "Selection aid for soft starters" on page 4/6.

The space required by the compact SIRIUS 3RW30 soft starter

is often only about one third of that required by a contactor as-
sembly for wye-delta starting of comparable rating. This not only
saves space in the control cabinet and on the standard mount-
ing rail but also does away completely with the wiring work
needed for wye-delta starters. This is notable in particular for
higher motor ratings which are only rarely available as fully wired
solutions.
At the same time the number of cables from the starter to the mo-
tor is reduced from six to three. Compact dimensions, short
start-up times, easy wiring and fast commissioning make them-
selves felt as clear-cut cost advantages.
The bypass contacts of these soft starters are protected during
operation by an integrated solid-state arc quenching system.
This prevents damage to the bypass contacts in the event of a
fault, e. g. brief disconnection of the control voltage, mechanical
shocks or life-related component defects on the coil operating
mechanism or main contact spring.
The new series of devices comes with the "polarity balancing"
control method, which is designed to prevent direct current com-
ponents in two-phase controlled soft starters. On two-phase
controlled soft starters the current resulting from superimposition
of the two controlled phases flows in the uncontrolled phase.
This results for physical reasons in an asymmetric distribution of
the three phase currents during the motor ramp-up. This phe-
nomenon cannot be influenced, but in most applications it is
non-critical.
Controlling the power semiconductors results not only in this
asymmetry, however, but also in the previously mentioned direct
current components which can cause severe noise generation
on the motor at starting voltages of less than 50 %. The control
method used for these soft starters eliminates these direct cur-
rent components during the ramp-up phase and prevents the
braking torque which they can cause.
It creates a motor ramp-up that is uniform in speed, torque and
current rise, thus permitting a particularly gentle, two-phase
starting of the motors. At the same time the acoustic quality of

4/8 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW30

■ Technical specifications
Type 3RW30 1. 3RW30 2. 3RW30 3. 3RW30 4.
Mechanics and environment
Mounting dimensions (WxHxD)
• Screw terminals mm 45 x 95 x 151 45 x 125 x 151 55 x 144 x 168 70 x 160 x 186
• Spring-type terminals mm 45 x 117.2 x 151 45 x 150 x 151 55 x 144 x 168 70 x 160 x 186
H

D
W

Permissible ambient temperature

Operation °C -25 ... +60; (derating from +40)
Storage °C -40 ... +80
Weight kg 0.58 0.69 1.20 1.71

4
Permissible mounting position1) 10° 10°
(auxiliary fan not available) 10° 10°

NSB0_01897
Installation type1) Stand-alone installation
 
    ุPP ุLQ      ุPP ุLQ 
   ุPP ุLQ     ุPP ุLQ 
     
 ุPP ุLQ   ุPP ุLQ 
 

Permissible installation altitude m 5 000

(derating from 1000, see Characteristic curves page 4/7); higher on request
Degree of protection IP20 IP00
1)
In case of deviations, please note derating (see Manual in Chapter
"Configuration").

Type 3RW30 1. to 3RW30 4.

Control electronics
Rated values Terminal
Rated control supply voltage A1/A2 V 24 110 ... 230
• Tolerance % ±20 -15/+10
Rated frequency Hz 50/60
• Tolerance % ±10

Type 3RW30 1. to 3RW30 4.

Power electronics
Rated operational voltage V AC 200 ... 480
Tolerance % -15/+10
Rated frequency Hz 50/60
Tolerance % ±10
Uninterrupted duty at 40 °C (% of Ie) % 115
Minimum load (% of Ie) % 10 (at least 2 A)
Maximum cable length between soft starter and motor m 300

Siemens IC 10 · 2011 4/9

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW30

Type 3RW30 03-1CB54 3RW30 03-2CB54

Mechanics and environment
Mounting dimensions (WxHxD)
• Screw terminals mm 22.5 x 100 x 120 --
• Spring-type terminals mm -- 22.5 x 101.6 x 120

D
W

Permissible ambient temperature

Operation °C -25 ... +60; (derating from +40)
Storage °C -40 ... +80
Weight kg 0.207 0.188
Permissible mounting position 10° 10°
10° 10°

NSB0_01897
4

Permissible installation altitude m 5 000

(derating from 1000, see Characteristic curves page 4/7); higher on request
Degree of protection acc. to IEC 60529 IP20 (IP00 terminal compartment)
Control electronics
Rated values
Rated control supply voltage V 24 ... 230 AC/DC
• Tolerance % ± 10
Rated frequency at AC Hz 50/60
• Tolerance % ± 10
Power electronics
Rated operational voltage V AC 200 ... 400
Tolerance % ± 10
Rated frequency Hz 50/60
Tolerance % ±10
Uninterrupted duty (% of Ie) % 100
Minimum load1) (% of Ie); at 40 °C % 9
Maximum conductor length between soft starter and motor m 1002)
1)
The rated motor current (specified on the motor's name plate) should at
least amount to the specified percentage of the SIRIUS soft starter unit's
rated operational current Ie.
2)
If this value is exceeded, problems with line capacities may arise, which
can result in false firing.

4/10 Siemens IC 10 · 2011

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SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW30
Motor feeders with soft starters
ToC Type of coordination "1" according to IEC 60947-4-1:
The type of coordination to which the motor feeder with soft 1
After a short-circuit incident the unit is defective
starter is mounted depends on the application-specific require- therefore unsuitable for further use (protection of per-
ments. Normally, fuseless mounting (combination of motor sons and equipment guaranteed).
starter protector/circuit breaker and soft starter) is sufficient.
If type of coordination "2" is to be fulfilled, semiconductor fuses ToC Type of coordination "2" according to IEC 60947-4-1:
2
must be fitted in the motor feeder. After a short-circuit incident the unit is suitable for
further use (protection of persons and equipment
guaranteed).

The type of coordination refers to soft starters in

combination with the stipulated protective device
(motor starter protector/circuit breaker/fuse), not to
any additional components in the feeder.

4
The types of coordination are indicated in the
corresponding tables by the symbols shown
on orange backgrounds.

Fuseless version

Q1

Q11
NSB0_01935

M
3~

Soft starters Motor starter protectors1)

ToC
1 Rated 400 V +10 % Rated
current current
Q11 Q1 Iq max
Type A Type kA A
Type of coordination "1"
3RW30 03 3 3RV20 11-1EA.. 50 4
3RW30 13 3.6 3RV20 11-1FA.. 5 5
3RW30 14 6.5 3RV20 11-1HA.. 5 8
3RW30 16 9 3RV20 11-1JA.. 5 10
3RW30 17 12.5 3RV20 11-1KA.. 5 12.5
3RW30 18 17.6 3RV20 21-4BA.. 5 20
3RW30 26 25 3RV20 21-4DA.. 55 25
3RW30 27 32 3RV20 21-4EA.. 55 32
3RW30 28 38 3RV20 21-4FA.. 55 40
3RW30 36 45 3RV10 31-4GA10 20 45
3RW30 37 63 3RV10 41-4JA10 20 63
3RW30 38 72 3RV10 41-4KA10 20 75
3RW30 46 80 3RV10 41-4LA10 11 90
3RW30 47 106 3RV10 41-4MA10 11 100
1)
The rated motor current must be considered when selecting the devices.

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 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW30

Fused version (line protection only)

F1

Q21

Q11
NSB0_01936

M
3~

Soft starters Line fuses, maximum Line contactors

ToC
1 Rated Rated Size (optional)
current current
4

Q11 F1 Q21
Type A Type A
Type of coordination "1"1): Iq = 65 kA at 480 V + 10 %
3RW30 032) 3 3NA3 8053) 20 000 3RT10 15
3RW30 13 3.6 3NA3 803-6 10 000 3RT10 15
3RW30 14 6.5 3NA3 805-6 16 000 3RT10 15
3RW30 16 9 3NA3 807-6 20 000 3RT10 16
3RW30 17 12.5 3NA3 810-6 25 000 3RT10 24
3RW30 18 17.6 3NA3 814-6 35 000 3RT10 26
3RW30 26 25 3NA3 822-6 63 00 3RT10 26
3RW30 27 32 3NA3 824-6 80 00 3RT10 34
3RW30 28 38 3NA3 824-6 80 00 3RT10 35
3RW30 36 45 3NA3 130-6 100 1 3RT10 36
3RW30 37 63 3NA3 132-6 125 1 3RT10 44
3RW30 38 72 3NA3 132-6 125 1 3RT10 45
3RW30 46 80 3NA3 136-6 160 1 3RT10 45
3RW30 47 106 3NA3 136-6 160 1 3RT10 46
1) 2)
The type of coordination "1" refers to soft starters in combination with the Iq = 50 kA at 400 V.
stipulated fuse, not to any additional components in the feeder. 3)
3NA3 805-1 (NH00), 5SB2 61 (DIAZED), 5SE2 201-6 (NEOZED).

Fused version with 3NE1 SITOR fuses (semiconductor and line protection)
For matching fuse bases see Catalog LV 10.1
• "Switch Disconnectors"
F1
• "Fuse Systems" --> "SITOR Semiconductor Fuses"
Q21 or at www.siemens.com/sitor

Q11
NSB0_01937

M
3~

Soft starters All-range fuses Line contactors

ToC
2 Rated Rated Size (optional)
current current
Q11 F1 Q21
Type A Type A
Type of coordination "2"1): Iq = 65 kA at 480 V + 10 %
3RW30 032) 3 3NE1 813-03) 16 000 3RT10 15
3RW30 13 3.6 3NE1 813-0 16 000 3RT10 15
3RW30 14 6.5 3NE1 813-0 16 000 3RT10 15
3RW30 16 9 3NE1 813-0 16 000 3RT10 16
3RW30 17 12.5 3NE1 813-0 16 000 3RT10 24
3RW30 18 17.6 3NE1 814-0 20 000 3RT10 26
3RW30 26 25 3NE1 803-0 35 000 3RT10 26
3RW30 27 32 3NE1 020-2 80 00 3RT10 34
3RW30 28 38 3NE1 020-2 80 00 3RT10 35
3RW30 36 45 3NE1 020-2 80 00 3RT10 36
3RW30 37 63 3NE1 820-0 80 000 3RT10 44
3RW30 38 72 3NE1 820-0 80 000 3RT10 45
3RW30 46 80 3NE1 021-0 100 00 3RT10 45
3RW30 47 106 3NE1 022-0 125 00 3RT10 46
1) The type of coordination "2" refers to soft starters in combination with the
stipulated fuse, not to any additional components in the feeder.
2) Iq = 50 kA at 400 V.
3) No SITOR fuse required!
Alternatively: 3NA3 803 (NH00), 5SB2 21 (DIAZED), 5SE2 206 (NEOZED).

4/12 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW30

Fused version with 3NE3 SITOR fuses (semiconductor protection by fuse, line and overload protection by motor starter protector;
alternatively, installation with contactor and overload relay possible)
For matching fuse bases see Catalog LV 10.1
F3 F1 • "Switch Disconnectors"
Q21
• "Fuse Systems" --> "SITOR Semiconductor Fuses"
Q1 or at www.siemens.com/sitor
F3
Q11
Q11
NSB0_01938

NSB0_01939
M M
3~ 3~

Soft starters Semiconductor fuses, minimum Semiconductor fuses, maximum Semiconductor fuses, minimum
ToC
Rated Rated Size Rated Size Rated Size

4
2
current current current current
Q11 F3 F3 F3
Type A Type A Type A Type A
Type of coordination "2"1): Iq = 65 kA at 480 V + 10 %
3RW30 032) 3 -- -- -- -- -- --
3RW30 13 3.6 -- -- -- -- -- -- 3NE4 101 32 0
3RW30 14 6.5 -- -- -- -- -- -- 3NE4 101 32 0
3RW30 16 9 -- -- -- -- -- -- 3NE4 101 32 0
3RW30 17 12.5 -- -- -- -- -- -- 3NE4 101 32 0
3RW30 18 17.6 -- -- -- 3NE3 221 100 1 3NE4 101 32 0
3RW30 26 25 -- -- -- 3NE3 221 100 1 3NE4 102 40 0
3RW30 27 32 -- -- -- 3NE3 222 125 1 3NE4 118 63 0
3RW30 28 38 -- -- -- 3NE3 222 125 1 3NE4 118 63 0
3RW30 36 45 -- -- -- 3NE3 224 160 1 3NE4 120 80 0
3RW30 37 63 -- -- -- 3NE3 225 200 1 3NE4 121 100 0
3RW30 38 72 3NE3 221 100 1 3NE3 227 250 1 -- -- --
3RW30 46 80 3NE3 222 125 1 3NE3 225 200 1 -- -- --
3RW30 47 106 3NE3 224 160 1 3NE3 231 350 1 -- -- --

Soft starters Semiconductor fuses, max. Semiconductor fuses, min. Semiconductor fuses, max. Cylindrical fuses
ToC
2 Rated Rated Size Rated Size Rated Size Rated
current current current current current
Q11 F3 F3 F3 F3
Type A Type A Type A Type A Type A
1)
Type of coordination "2" : Iq = 65 kA at 480 V + 10 %
3RW30 032) 3 -- -- -- 3NE8 015-1 25 00 3NE8 015-1 25 00 3NC1 010 10
3RW30 13 3.6 -- -- -- 3NE8 015-1 25 00 3NE8 015-1 25 00 3NC2 220 20
3RW30 14 6.5 -- -- -- 3NE8 015-1 25 00 3NE8 015-1 25 00 3NC2 220 20
3RW30 16 9 -- -- -- 3NE8 015-1 25 00 3NE8 015-1 25 00 3NC2 220 20
3RW30 17 12.5 -- -- -- 3NE8 015-1 25 00 3NE8 018-1 63 00 3NC2 250 50
3RW30 18 17.6 -- -- -- 3NE8 003-1 35 00 3NE8 021-1 100 00 3NC2 263 63
3RW30 26 25 3NE4 117 50 0 3NE8 017-1 50 00 3NE8 021-1 100 00 3NC2 263 63
3RW30 27 32 3NE4 118 63 0 3NE8 018-1 63 00 3NE8 022-1 125 00 3NC2 280 80
3RW30 28 38 3NE4 118 63 0 3NE8 020-1 80 00 3NE8 022-1 125 00 3NC2 280 80
3RW30 36 45 3NE4 120 80 0 3NE8 020-1 80 00 3NE8 024-1 160 00 3NC2 280 80
3RW30 37 63 3NE4 121 100 0 3NE8 021-1 100 00 3NE8 024-1 160 00 -- --
3RW30 38 72 -- -- -- 3NE8 022-1 125 00 3NE8 024-1 160 00 -- --
3RW30 46 80 -- -- -- 3NE8 022-1 125 00 3NE8 024-1 160 00 -- --
3RW30 47 106 -- -- -- 3NE8 024-1 160 00 3NE8 024-1 160 00 -- --

Soft starters Line contactors Motor starter protectors Line fuses, maximum
ToC
2 Rated (optional) 400 V +10 % Rated Rated Size
current current current
Q11 Q21 Q1 F1
Type A Type A Type A
Type of coordination "2"1): Iq = 65 kA at 480 V + 10 %
3RW30 032) 3 3RT10 15 3RV20 11-1EA.. 4 3NA3 8053) 20 000
3RW30 13 3.6 3RT10 15 3RV20 11-1FA.. 5 3NA3 803-6 10 000
3RW30 14 6.5 3RT10 15 3RV20 11-1HA.. 8 3NA3 805-6 16 000
3RW30 16 9 3RT10 16 3RV20 11-1JA.. 10 3NA3 807-6 20 000
3RW30 17 12.5 3RT10 24 3RV20 11-1KA.. 12.5 3NA3 810-6 25 000
3RW30 18 17.6 3RT10 26 3RV20 21-4BA.. 20 3NA3 814-6 35 000
3RW30 26 25 3RT10 26 3RV20 21-4DA.. 25 3NA3 822-6 63 00
3RW30 27 32 3RT10 34 3RV20 21-4EA.. 32 3NA3 824-6 80 00
3RW30 28 38 3RT10 35 3RV20 21-4FA.. 40 3NA3 824-6 80 00
3RW30 36 45 3RT10 36 3RV10 31-4GA10 45 3NA3 130-6 100 1
3RW30 37 63 3RT10 44 3RV10 41-4JA10 63 3NA3 132-6 125 1
3RW30 38 72 3RT10 45 3RV10 41-4KA10 75 3NA3 132-6 125 1
3RW30 46 80 3RT10 45 3RV10 41-4LA10 90 3NA3 136-6 160 1
3RW30 47 106 3RT10 46 3RV10 41-4MA10 100 3NA3 136-6 160 1
1)The type of coordination "2" refers to soft starters in combination with the 2) Iq = 50 kA at 400 V.
stipulated protective device (motor starter protector/fuse), not to any addi- 3)
3NA3 805-1 (NH00), 5SB2 61 (DIAZED).
tional components in the feeder.

Siemens IC 10 · 2011 4/13

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW30

■ Selection and ordering data

3RW30 1. 3RW30 2. 3RW30 3. 3RW30 4. 3RW30 03-2CB54

4

1) 1)
3RW ambient temperature 40 °C 3RW ambient temperature 50 °C Size DT Order No. Price PU PS* PG
Rated values of Rated values of per PU (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie 230 V 400 V 500 V current Ie 200 V 230 V 460 V 575 V
A kW kW kW A hp hp hp hp
Rated operational voltage Ue 200 ... 480 V2)
• With screw terminals
3.6 0.75 1.5 -- 3 0.5 0.5 1.5 -- S00 } 3RW30 13-1BB@4 1 1 unit 131
6.5 1.5 3 -- 4.8 1 1 3 -- S00 } 3RW30 14-1BB@4 1 1 unit 131
9 2.2 4 -- 7.8 2 2 5 -- S00 } 3RW30 16-1BB@4 1 1 unit 131
12.5 3 5.5 -- 11 3 3 7.5 -- S00 } 3RW30 17-1BB@4 1 1 unit 131
17.6 4 7.5 -- 17 3 3 10 -- S00 } 3RW30 18-1BB@4 1 1 unit 131
• With spring-type terminals
3.6 0.75 1.5 -- 3 0.5 0.5 1.5 -- S00 B 3RW30 13-2BB@4 1 1 unit 131
6.5 1.5 3 -- 4.8 1 1 3 -- S00 B 3RW30 14-2BB@4 1 1 unit 131
9 2.2 4 -- 7.8 2 2 5 -- S00 B 3RW30 16-2BB@4 1 1 unit 131
12.5 3 5.5 -- 11 3 3 7.5 -- S00 B 3RW30 17-2BB@4 1 1 unit 131
17.6 4 7.5 -- 17 3 3 10 -- S00 B 3RW30 18-2BB@4 1 1 unit 131
• With screw terminals
25 5.5 11 -- 23 5 5 15 -- S0 } 3RW30 26-1BB@4 1 1 unit 131
32 7.5 15 -- 29 7.5 7.5 20 -- S0 } 3RW30 27-1BB@4 1 1 unit 131
38 11 18.5 -- 34 10 10 25 -- S0 } 3RW30 28-1BB@4 1 1 unit 131
• With spring-type terminals
25 5.5 11 -- 23 5 5 15 -- S0 B 3RW30 26-2BB@4 1 1 unit 131
32 7.5 15 -- 29 7.5 7.5 20 -- S0 B 3RW30 27-2BB@4 1 1 unit 131
38 11 18.5 -- 34 10 10 25 -- S0 B 3RW30 28-2BB@4 1 1 unit 131
• With screw or spring-type terminals
45 11 22 -- 42 10 15 30 -- S2 } 3RW30 36-@BB@4 1 1 unit 131
63 18.5 30 -- 58 15 20 40 -- S2 } 3RW30 37-@BB@4 1 1 unit 131
72 22 37 -- 62 20 20 40 -- S2 } 3RW30 38-@BB@4 1 1 unit 131
• With screw or spring-type terminals
80 22 45 -- 73 20 25 50 -- S3 } 3RW30 46-@BB@4 1 1 unit 131
106 30 55 -- 98 30 30 75 -- S3 } 3RW30 47-@BB@4 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals3) 2
Order No. supplement for rated control supply voltage Us
• 24 V AC/DC 0
• 110 ... 230 V AC/DC 1

Soft starters for easy starting conditions and high switching frequency,
rated operational voltage Ue 200 ... 400 V,
rated control supply voltage Us 24 ... 230 V AC/DC
3 0.55 1.1 -- 2.6 0.5 0.5 -- -- 22.5 mm
• With screw terminals } 3RW30 03-1CB54 1 1 unit 131
• With spring-type terminals B 3RW30 03-2CB54 1 1 unit 131
1) 3)
Stand-alone installation. Main circuit connection: screw terminals.
2)
Soft starter with screw terminals: delivery time class } (preferred type).
Note:
The listed motor ratings are rough guide values. The soft starter determined for the following boundary conditions (see also the
should always be designed on the basis of the required rated notes on page 4/6):
operational current of the motor. • Maximum starting time in s: 3
• Maximum starting current in % of motor current Ie: 300
The SIRIUS 3RW30 solid-state soft starters are designed for • Maximum number of starts per hour in 1/h: 20
easy starting conditions. The selection and ordering data were

* You can order this quantity or a multiple thereof.

4/14 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW30
Accessories
Conductor cross-section Tightening For DT Order No. Price PU PS* PG
Solid or Finely AWG torque soft starters per PU (UNIT,
stranded stranded cables, size SET, M)
with end solid or
sleeve stranded
mm² mm² AWG Nm
Three-phase feeder terminals
2.5 ... 16 2.5 ... 16 10 ... 4 3 ... 4 S00 A 3RV29 25-5AB 1 1 unit 101
(3RW30 1.),
S0
(3RW30 2.)

3RV29 25-5AB

4
For soft starters DT Order No. Price PU PS* PG
Type Size per PU (UNIT,
SET, M)

Auxiliary terminals
Auxiliary terminals, 3-pole
3RW30 4. S3 B 3RT19 46-4F 1 1 unit 101
Covers for soft starters
Terminal covers for box terminals
Additional touch protection to be fitted at the box termi-
nals (2 units required per device)
3RW30 3. S2 } 3RT19 36-4EA2 1 1 unit 101
3RW30 4. S3 } 3RT19 46-4EA2 1 1 unit 101

Terminal covers for cable lugs and busbar connections

For complying with the phase clearances and as touch
protection if box terminal is removed
(2 units required per contactor)
3RW30 4. S3 } 3RT19 46-4EA1 1 1 unit 101

3RT19 46-4EA1
Manuals 3RW30/3RW401)
3RW30 1. S00 C 3ZX10 12-0RW30-1AB1 1 1 unit 191
3RW30 2. S0
3RW30 3. S2
3RW30 4. S3
Operating instructions1)
3RW30 1. S00 3ZX10 12-0RW30-2DA1
3RW30 2. S0
3RW30 3. S2
3RW30 4. S3
1)
The operating instructions are included in the scope of supply of the soft
starter or are available – like the manual – as a PDF download from the
Service&Support portal at www.siemens.com/industrial-controls/support
--> Controls --> Soft Starters and Solid-State Switching Devices -->
SIRIUS 3RW Soft Starters.

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/15
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW30

For soft starters Motor starter protectors DT Order No. Price PU PS* PG
Type Size Size per PU (UNIT,
SET, M)

Link modules to motor starter protectors1)

• With screw terminals
3RW30 1. S00 S00 A 3RA29 21-1BA00 1 1 unit 101
3RW30 2. S0 S00/S0 A 3RA29 21-1BA00 1 1 unit 101
3RW30 36. S2 S2 } 3RA19 31-1AA00 1 1 unit 101
3RW30 46., S3 S3 } 3RA19 41-1AA00 1 1 unit 101
3RW30 47.
• With spring-type terminals
3RW30 1. S00 S00 A 3RA29 11-2GA00 1 1 unit 101
4

3RW30 2. S0 S0 A 3RA29 21-2GA00 1 1 unit 101

1)
Can be used in size S0 up to maximum 32 A.
Can be used in size S00/S0 only for 3RV2 motor starter protectors.

Version Functionality DT Order No. Price PU PS* PG

Functions per PU (UNIT,
SET, M)

Covers and push-in lugs (only for 3RW30 03)

Sealable covers For securing against unauthor- } 3RP1 902 1 5 units 101
ized adjustment of setting knobs
Push-in lugs } 3RP1 903 1 10 units 101
For screw fixing
3RP1 902

3RP1 903

Version DT Order No. Price PU PS* PG

per PU (UNIT,
SET, M)

Tool for opening spring-type terminals for sizes S00 and S0

Spring-type terminals

Screwdrivers A 3RA29 08-1A 1 1 unit 101

For all SIRIUS devices with spring-type terminals
length approx. 200 mm, 3.0 mm x 0.5 mm,
3RA29 08-1A titanium gray/black, partially insulated
Blank labels
Unit labeling plates1) D 3RT19 00-1SB20 100 340 units 101
For SIRIUS devices
20 mm x 7 mm, pastel turquoise
NSB0_01429b

3RT19 00-1SB20

* You can order this quantity or a multiple thereof.

4/16 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW30

■ More information
Application examples for normal starting (CLASS 10)
Normal starting CLASS 10 (up to 20 s with 300 % In motor)
The soft starter rating can be selected to be as high as the rating of the motor used
Application Conveyor belt Roller conveyor Compressor Small fan1) Pump Hydraulic pump
Starting parameters
• Voltage ramp and current
limiting
- Starting voltage % 70 60 50 40 40 40
- Starting time s 10 10 20 20 10 10
1)
The mass inertia of the fan is <10 times the mass inertia of the motor.

Note: Status graphs

4
These tables present sample set values and device sizes. They
are intended only for the purposes of information and are not
binding. The set values depend on the application in question U
and must be optimized during commissioning.
UN
The soft starter dimensions should be checked where necessary
with the Win-Soft Starter software or with the help of Technical
Assistance. US

Configuration
t R on t
The 3RW solid-state motor controllers are designed for easy
starting conditions. In the event of deviating conditions or in-
creased switching frequency, it may be necessary to choose a
larger device. For accurate dimensioning, use the Win-Soft
Starter selection and simulation program.
ON 13/14

NSB0_01941
If necessary, an overload relay for heavy starting must be se-
lected where long starting times are involved. PTC sensors are
recommended.
t R on t
No capacitive elements are permitted in the motor feeder be-
tween the SIRIUS 3RW soft starter and the motor (e. g. no reac-
tive-power compensation equipment). In addition, neither static Manual for SIRIUS 3RW30/40
systems for reactive-power compensation nor dynamic PFC Besides containing all important information on configuring,
(Power Factor Correction) must be operated in parallel during commissioning and servicing, the manual also contains exam-
starting and ramp-down of the soft starter. This is important to ple circuits and the technical specifications for all devices.
prevent faults arising on the compensation equipment and/or the
soft starter. Win-Soft Starter selection and simulation program
All elements of the main circuit (such as fuses, controls and over- With this software, you can simulate and select all Siemens soft
load relays) should be dimensioned for direct starting, following starters, taking into account various parameters such as mains
the local short-circuit conditions. Fuses, controls and overload properties, motor and load data, and special application
relays must be ordered separately. Please observe the maxi- requirements.
mum switching frequencies specified in the technical
specifications. The software is a valuable tool, which makes complicated,
lengthy manual calculations for determining the required soft
Note: starters superfluous.
When induction motors are switched on, voltage drops occur as
a rule on starters of all types (direct starters, wye-delta starters, The Win-Soft Starter selection and simulation program can be
soft starters). The infeed transformer must always be dimen- downloaded from:
sioned such that the voltage dip when starting the motor remains www.siemens.com/softstarter --> Software
within the permissible tolerance. If the infeed transformer is di- You can find more information about soft starters on the Internet
mensioned with only a small margin, it is best for the control volt- likewise at:
age to be supplied from a separate circuit (independently of the www.siemens.com/softstarter
main voltage) in order to avoid the potential switching off of the
soft starter. Training course for SIRIUS soft starters (SD-SIRIUSO)
Schematic circuit diagram of power electronics Siemens offers a 2-day training course on the SIRIUS solid-state
soft starters to keep customers and own personnel up-to-date on
configuring, commissioning and maintenance issues.
L1 L2 L3
You can find more information on our SITRAIN website:
www.siemens.com/sitrain
--> For course name select "SD-SIRIUSO"
NSB0_01940

Please direct enquiries and applications to SITRAIN Customer

Support:
T1 T2 T3
Tel.: +49 (1805) 23 56 11
Fax: +49 (1805) 23 56 12
A bypass contact system is already integrated in the 3RW30 soft starter E-mail: info@sitrain.com
and therefore does not have to be ordered separately.

Siemens IC 10 · 2011 4/17

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40
sult of this function the actual motor ramp-up can well take lon-
■ Overview ger than the ramp time selected on the soft starter.
Thanks to the integrated motor overload protection
SIRIUS 3RW40 soft starters have all the same advantages as the according to IEC 60947-4-2 there is no need of an additional
3RW30 soft starters. overload relay on the new soft starters. The rated motor current,
The SIRIUS 3RW40 soft starters are characterized above all by the setting of the overload tripping time (CLASS times) and the
their small space requirements. Integrated bypass contacts reset of the motor overload protection function can be adjusted
mean that no power loss has to be taken into the bargain at the easily and quickly. Using a 4-step rotary potentiometer it is pos-
power semiconductors (thyristors) after the motor has started sible to set different overload tripping times on the soft starter. In
up. This cuts down on heat losses, enabling a more compact de- addition to CLASS 10, 15 and 20 it is also possible to switch off
sign and making external bypass circuits superfluous. the motor overload protection if a different motor management
control device is to be used for this function, e. g. with connec-
At the same time this soft starter comes with additional inte-
tion to PROFIBUS.
grated functions such as adjustable current limiting, motor over-
load and intrinsic device protection, and optional thermistor mo- Device versions with thermistor motor protection evaluation are
4

tor protection. The higher the motor rating, the more important available up to a rating of 55 kW (at 400 V). A "Thermoclick" mea-
these functions because they make it unnecessary to purchase suring probe can be connected directly, as can a PTC of type A.
and install protection equipment such as overload relays. Thermal overloading of the motor, open circuits and short cir-
Internal intrinsic device protection prevents the thermal over- cuits in the sensor circuit all result in the direct disconnection of
loading of the thyristors and the power section defects this can the soft starter. And if ever the soft starter trips, various reset op-
cause. As an option the thyristors can also be protected by semi- tions are available the same as with intrinsic device protection
conductor fuses from short-circuiting. and motor load protection: manually with the reset button, auto-
matically or remotely through brief disconnection of the control
Thanks to integrated status monitoring and fault monitoring, this voltage.
compact soft starter offers many different diagnostics options.
Up to four LEDs and relay outputs permit differentiated monitor- The new series of devices comes with the "polarity balancing"
ing and diagnostics of the operating mechanism by indicating control method, which is designed to prevent direct current com-
the operating state as well as for example mains or phase failure, ponents in two-phase controlled soft starters. On two-phase
missing load, non-permissible tripping time/class setting, ther- controlled soft starters the current resulting from superimposition
mal overloading or device faults. of the two controlled phases flows in the uncontrolled phase.
Soft starters rated up to 250 kW (at 400 V) for standard applica- This results for physical reasons in an asymmetric distribution of
tions in three-phase networks are available. Extremely small the three phase currents during the motor ramp-up. This phe-
sizes, low power losses and simple start-up are just three of the nomenon cannot be influenced, but in most applications it is
many advantages of the SIRIUS 3RW40 soft starters. non-critical.
Controlling the power semiconductors results not only in this
"Increased safety" type of protection EEx e according to
asymmetry, however, but also in the previously mentioned direct
ATEX directive 94/9/EC
current components which can cause severe noise generation
The 3RW40 soft starter sizes S0 to S12 are suitable for the start- on the motor at starting voltages of less than 50 %.
ing of explosion-proof motors with "increased safety" type of pro-
The control method used for these soft starters eliminates these
tection EEx e. See www.siemens.com/industrial-controls/atex.
direct current components during the ramp-up phase and pre-
Functionality vents the braking torque which they can cause. It creates a mo-
tor ramp-up that is uniform in speed, torque and current rise,
The space required by the compact SIRIUS 3RW40 soft starter thus permitting a particularly gentle, two-phase starting of the
is often only about one third of that required by a contactor as- motors. At the same time the acoustic quality of the starting op-
sembly for wye-delta starting of comparable rating. This not only eration comes close to the quality of a three-phase controlled
saves space in the control cabinet and on the standard mount- soft starter. This is made possible by the on-going dynamic har-
ing rail but also does away completely with the wiring work monizing and balancing of current half-waves of different polar-
needed for wye-delta starters. This is notable in particular for ity during the motor ramp-up. Hence the name "polarity
higher motor ratings which are only rarely available as fully wired balancing".
solutions.
At the same time the number of cables from the starter to the mo- ■ Application
tor is reduced from six to three. Compact dimensions, short
start-up times, easy wiring and fast commissioning make them- The SIRIUS 3RW40 solid-state soft starters are used for the soft
selves felt as clear-cut cost advantages. starting and stopping of three-phase asynchronous motors.
Due to two-phase control, the current is kept at minimum values
The bypass contacts of these soft starters are protected during in all three phases throughout the entire starting time and dis-
operation by an integrated solid-state arc quenching system. turbing direct current components are eliminated in addition.
This prevents damage to the bypass contacts in the event of a This not only enables the two-phase starting of motors up to
fault, e. g. brief disconnection of the control voltage, mechanical 250 kW (at 400 V) but also avoids the current and torque peaks
shocks or life-related component defects on the coil operating which occur e. g. with wye-delta starters.
mechanism or main contact spring.
Application areas
The starting current of particularly powerful operating mecha-
nisms can place an unjustifiable load on the local supply system. See "Selection aid for soft starters" on page 4/6.
Soft starters reduce this starting current by means of their volt-
age ramp. Thanks to the adjustable current limiting, the SIRIUS
3RW40 soft starter takes even more pressure off the supply sys-
tem. It leaves the set start ramp during the ramp-up – the ramp
gradient is fixed by the starting voltage and the ramp time – as
soon as the selected current limit is reached. From this moment
the voltage of the soft starter is controlled so that the current sup-
plied to the motor remains constant. This process is ended either
by completion of the motor ramp-up or by tripping by the intrin-
sic device protection or the motor overload protection. As the re-

4/18 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40

■ Technical specifications
Type 3RW40 2. 3RW40 3. 3RW40 4. 3RW40 5. 3RW40 7.
Mechanics and environment
Mounting dimensions (WxHxD)
• Screw terminals mm 45 x 125 x 154 55 x 144 x 170 70 x 160 x 188 120 x 198 x 250 160 x 230 x 278
• Spring-type terminals mm 45 x 150 x 154 55 x 144 x 170 70 x 160 x 188 120 x 198 x 250 160 x 230 x 278
H

D
W

Permissible ambient temperature

Operation °C -25 ... +60; (derating from +40)
Storage °C -40 ... +80
Weight kg 0.77 1.35 1.9 4.9 (3RW40 55), 8.9
6.9 (3RW40 56)

4
Permissible mounting position1)
• With auxiliary fan

NSB0_00649a
22,5° 22,5°
(for 3RW40 2. ... 3RW40 4.) 90° 90°

• Without auxiliary fan 10° 10°

10° 10° -- (fan integrated in the soft
(for 3RW40 2. ... 3RW40 4.) starter)

NSB0_01897
Installation type1) Stand-alone installation 3RW40 2. 3RW40 5., 3RW40 7.


    ุPP ุLQ   ุPP ุLQ 
   ุPP ุLQ   ุPP ุLQ 
  
 ุPP ุLQ   ุPP ุLQ 


3RW40 3., 3RW40 4.


    ุPP ุLQ 
   ุPP ุLQ 
B

  
 ุPP ุLQ 


Permissible installation altitude m 5 000

(derating from 1000, see Characteristic curves page 4/7); higher on request
Degree of protection IP20 IP00
1)
In case of deviations, please note derating (see Manual in Chapter
"Configuration").

Type 3RW40 2. to 3RW40 4. 3RW40 5., 3RW40 7.

Control electronics
Rated values Terminal
Rated control supply voltage A1/A2 V 24 DC/AC 110 ... 230 AC/DC 115 AC 230 AC
• Tolerance % ±20 -15/+10 -15/+10
Rated frequency Hz 50/60
• Tolerance % ±10

Type 3RW40 2.-. .B.4, 3RW40 2.-. .B.5, 3RW40 5.-.BB.4, 3RW40 5.-.BB.5,
3RW40 3.-. .B.4, 3RW40 3.-. .B.5, 3RW40 7.-.BB.4 3RW40 7.-.BB.5
3RW40 4.-. .B.4 3RW40 4.-. .B.5
Power electronics
Rated operational voltage V AC 200 ... 480 400 ... 600 200 ... 460 400 ... 600
Tolerance % -15/+10 -15/+10 -15/+10 -15/+10
Maximum blocking voltage (thyristor) V AC 1 600 1 400 1 800
Rated frequency Hz 50/60
Tolerance % ±10
Uninterrupted duty at 40 °C (% of Ie) % 115
Minimum load (% of minimum selectable rated motor current IM) % 20 (at least 2 A)
Maximum cable length between soft starter and motor m 300

Siemens IC 10 · 2011 4/19

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40
Motor feeders with soft starters
ToC Type of coordination "1" according to IEC 60947-4-1:
The type of coordination to which the motor feeder with soft 1
After a short-circuit incident the unit is defective
starter is mounted depends on the application-specific require- therefore unsuitable for further use (protection of per-
ments. Normally, fuseless mounting (combination of motor sons and equipment guaranteed).
starter protector/circuit breaker and soft starter) is sufficient.
If type of coordination "2" is to be fulfilled, semiconductor fuses ToC Type of coordination "2" according to IEC 60947-4-1:
2
must be fitted in the motor feeder. After a short-circuit incident the unit is suitable for
further use (protection of persons and equipment
guaranteed).

The type of coordination refers to soft starters in

combination with the stipulated protective device
(motor starter protector/circuit breaker/fuse), not to
any additional components in the feeder.
4

The types of coordination are indicated in the

corresponding tables by the symbols shown
on orange backgrounds.

Fuseless version

Q1

Q11
NSB0_01902

M
3~

Soft starters ToC Motor starter protectors/circuit breakers1)

1
Rated 400 V +10 % 400 V +10 % Rated 575 V +10 % Rated
current current current
Q11 Q1 Q1 Iq max Q1 Iq max
Type A Type Type kA A Type kA A
Type of coordination "1"
3RW40 24 12.5 3RV20 21-4AA.. (S0)/ 3RV23 21-4AC.. (S0)/ 55 16 -- -- --
3RV20 11-4AA.. (S00) 3RV23 11-4AC.. (S00)
3RW40 26 25 3RV20 21-4DA.. 3RV23 21-4DC.. 55 25 -- -- --
3RW40 27 32 3RV20 21-4EA.. 3RV23 21-4EC.. 55 32 -- -- --
3RW40 28 38 3RV20 21-4FA.. 3RV23 21-4FC.. 55 40 -- -- --
3RW40 36 45 3RV10 31-4GA10 3RV13 31-4GC10 20 45 -- -- --
3RW40 37 63 3RV10 41-4JA10 3RV13 41-4JC10 20 63 -- -- --
3RW40 38 72 3RV10 41-4KA10 3RV13 41-4KC10 20 75 -- -- --
3RW40 46 80 3RV10 41-4LA10 3RV13 41-4LC10 11 90 -- -- --
3RW40 47 106 3RV10 41-4MA10 3RV13 41-4MC10 11 100 -- -- --
3RW40 55 134 3VL3 720-2DC36 -- 35 200 3VL3 720-1DC36 12 200
3RW40 56 162 3VL3 720-2DC36 -- 35 200 3VL3 720-1DC36 12 200
3RW40 73 230 3VL4 731-2DC36 -- 65 315 3VL5 731-3DC36 35 315
3RW40 74 280 3VL4 731-2DC36 -- 65 315 3VL5 731-3DC36 35 315
3RW40 75 356 3VL4 740-2DC36 -- 65 400 3VL5 740-3DC36 35 400
3RW40 76 432 3VL5 750-2DC36 -- 65 500 3VL5 750-3DC36 35 500
1)
The rated motor current must be considered when selecting the devices.
3RV13 motor starter protectors are designed for starter combinations (with-
out motor protection). Motor protection is provided in this case by the
3RW40 soft starter.

4/20 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40

Fused version (line protection only)

F1

Q21

Q11

NSB0_01904

M
3~

Soft starters ToC Line fuses, maximum Line contactors

1
Rated Rated Size (optional)

4
current current
Q11 F1 Q21
Type A Type A
Type of coordination "1"1): Iq = 65 kA at 600 V + 5 %
3RW40 24 12.5 3NA3 820-6 50 00 3RT10 24
3RW40 26 25 3NA3 822-6 63 00 3RT10 26
3RW40 27 32 3NA3 824-6 80 00 3RT10 34
3RW40 28 38 3NA3 824-6 80 00 3RT10 35
3RW40 36 45 3NA3 130-6 100 1 3RT10 36
3RW40 37 63 3NA3 132-6 125 1 3RT10 44
3RW40 38 72 3NA3 132-6 125 1 3RT10 45
3RW40 46 80 3NA3 136-6 160 1 3RT10 45
3RW40 47 106 3NA3 136-6 160 1 3RT10 46
3RW40 55 134 3NA3 244-6 250 2 3RT10 55-6A.36
3RW40 56 162 3NA3 244-6 250 2 3RT10 56-6A.36
3RW40 73 230 2 x 3NA3 354-6 2 x 355 3 3RT10 65-6A.36
3RW40 74 280 2 x 3NA3 354-6 2 x 355 3 3RT10 66-6A.36
3RW40 75 356 2 x 3NA3 365-6 2 x 500 3 3RT10 75-6A.36
3RW40 76 432 2 x 3NA3 365-6 2 x 500 3 3RT10 76-6A.36
1) The type of coordination "1" refers to soft starters in combination with the
stipulated fuse, not to any additional components in the feeder.

Fused version with 3NE1 SITOR fuses (semiconductor and line protection)
For matching fuse bases see Catalog LV 10.1
F’1 • "Switch Disconnectors"
• "Fuse Systems" --> "SITOR Semiconductor Fuses"
Q21 or at www.siemens.com/sitor
Q11
NSB0_01905

M
3~

Soft starters ToC All-range fuses Line contactors

2
Rated Rated Size (optional)
current current
Q11 F’1 Q21
Type A Type A
Type of coordination "2"1): Iq = 65 kA at 600 V + 5 %
3RW40 24 12.5 3NE1 814-0 20 000 3RT10 24
3RW40 26 25 3NE1 803-0 35 000 3RT10 26
3RW40 27 32 3NE1 020-2 80 00 3RT10 34
3RW40 28 38 3NE1 020-2 80 00 3RT10 35
3RW40 36 45 3NE1 020-2 80 00 3RT10 36
3RW40 37 63 3NE1 820-0 80 000 3RT10 44
3RW40 38 72 3NE1 820-0 80 000 3RT10 45
3RW40 46 80 3NE1 021-0 100 00 3RT10 45
3RW40 47 106 3NE1 022-0 125 00 3RT10 46
3RW40 55 134 3NE1 227-2 250 1 3RT10 55-6A.36
3RW40 56 162 3NE1 227-2 250 1 3RT10 56-6A.36
3RW40 73 230 3NE1 331-2 350 2 3RT10 65-6A.36
3RW40 74 280 3NE1 333-2 450 2 3RT10 66-6A.36
3RW40 75 356 3NE1 334-2 500 2 3RT10 75-6A.36
3RW40 76 432 3NE1 435-2 560 3 3RT10 76-6A.36
1) The type of coordination "2" refers to soft starters in combination with the
stipulated fuse, not to any additional components in the feeder.

Siemens IC 10 · 2011 4/21

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40

Fused version with 3NE3 SITOR fuses (semiconductor protection by fuse, line and overload protection by motor starter protector;
alternatively, installation with contactor and overload relay possible)
For matching fuse bases see Catalog LV 10.1
F3 F1 • "Switch Disconnectors"
Q21 • "Fuse Systems" --> "SITOR Semiconductor Fuses"
Q1
F3 or at www.siemens.com/sitor
Q11
Q11

NSB0_01906
NSB0_01903

M M
3~ 3~

Soft starters ToC Semiconductor fuses, minimum Semiconductor fuses, maximum Semiconductor fuses, minimum
2
Rated Rated Size Rated Size Rated Size
4

Q11 current F3 current F3 current F3 current

Type A Type A Type A Type A
Type of coordination "2"1): Iq = 65 kA at 600 V + 5 %
3RW40 24 12.5 -- -- -- -- -- -- 3NE4 101 32 0
3RW40 26 25 -- -- -- 3NE3 221 100 1 3NE4 102 40 0
3RW40 27 32 -- -- -- 3NE3 224 160 1 3NE4 118 63 0
3RW40 28 38 -- -- -- 3NE3 224 160 1 3NE4 118 63 0
3RW40 36 45 -- -- -- 3NE3 224 160 1 3NE4 120 80 0
3RW40 37 63 -- -- -- 3NE3 225 200 1 3NE4 121 100 0
3RW40 38 72 3NE3 221 100 1 3NE3 227 250 1 -- -- --
3RW40 46 80 3NE3 222 125 1 3NE3 225 200 1 -- -- --
3RW40 47 106 3NE3 224 160 1 3NE3 231 350 1 -- -- --
3RW40 55 134 3NE3 227 250 1 3NE3 335 560 2 -- -- --
3RW40 56 162 3NE3 227 250 1 3NE3 335 560 2 -- -- --
3RW40 73 230 3NE3 232-0B 400 1 3NE3 333 450 2 -- -- --
3RW40 74 280 3NE3 233 450 1 3NE3 336 630 2 -- -- --
3RW40 75 356 3NE3 335 560 2 3NE3 336 630 2 -- -- --
3RW40 76 432 3NE3 337-8 710 2 3NE3 340-8 900 2 -- -- --

Soft starters ToC Semiconductor fuses, max. Semiconductor fuses, min. Semiconductor fuses, max. Cylindrical fuses
2
Rated Rated Size Rated Size Rated Size Rated
Q11 current F3 current F3 current F3 current F3 current
Type A Type A Type A Type A Type A
Type of coordination "2"1): Iq = 65 kA at 600 V + 5 %
3RW40 24 12.5 3NE4 117 50 0 3NE8 015-1 25 00 3NE8 017-1 50 00 3NC2 240 40
3RW40 26 25 3NE4 117 50 0 3NE8 017-1 50 00 3NE8 021-1 100 00 3NC2 263 63
3RW40 27 32 3NE4 118 63 0 3NE8 018-1 63 00 3NE8 022-1 125 00 3NC2 280 80
3RW40 28 38 3NE4 118 63 0 3NE8 020-1 80 00 3NE8 024-1 160 00 3NC2 280 80
3RW40 36 45 3NE4 120 80 0 3NE8 020-1 80 00 3NE8 024-1 160 00 3NC2 280 80
3RW40 37 63 3NE4 121 100 0 3NE8 021-1 100 00 3NE8 024-1 160 00 -- --
3RW40 38 72 -- -- -- 3NE8 022-1 125 00 3NE8 024-1 160 00 -- --
3RW40 46 80 -- -- -- 3NE8 022-1 125 00 3NE8 024-1 160 00 -- --
3RW40 47 106 -- -- -- 3NE8 024-1 160 00 3NE8 024-1 160 00 -- --
3RW40 55 134 -- -- -- -- -- -- -- -- -- -- --
3RW40 56 162 -- -- -- -- -- -- -- -- -- -- --
3RW40 73 230 -- -- -- -- -- -- -- -- -- -- --
3RW40 74 280 -- -- -- -- -- -- -- -- -- -- --
3RW40 75 356 -- -- -- -- -- -- -- -- -- -- --
3RW40 76 432 -- -- -- -- -- -- -- -- -- -- --

Soft starters ToC Line contactors Motor starter protectors/circuit breakers Line fuses, maximum
2
Rated (optional) 400 V +10 % Rated 575 V +10 % Rated Rated Size
Q11 current Q21 Q1 current Q1 current F1 current
Type A Type A Type A Type A
Type of coordination "2"1): Iq = 65 kA at 600 V + 5 %
3RW40 24 12.5 3RT10 24 3RV20 21-4AA.. (S0)/ 55 -- -- 3NA3 820-6 50 00
3RV20 11-4AA.. (S00)
3RW40 26 25 3RT10 26 3RV20 21-4DA.. 55 -- -- 3NA3 822-6 63 00
3RW40 27 32 3RT10 34 3RV20 21-4EA.. 55 -- -- 3NA3 824-6 80 00
3RW40 28 38 3RT10 35 3RV20 21-4FA.. 55 -- -- 3NA3 824-6 80 00
3RW40 36 45 3RT10 36 3RV10 31-4GA10 20 -- -- 3NA3 130-6 100 1
3RW40 37 63 3RT10 44 3RV10 41-4JA10 20 -- -- 3NA3 132-6 125 1
3RW40 38 72 3RT10 45 3RV10 41-4KA10 20 -- -- 3NA3 132-6 125 1
3RW40 46 80 3RT10 45 3RV10 41-4LA10 11 -- -- 3NA3 136-6 160 1
3RW40 47 106 3RT10 46 3RV10 41-4MA10 11 -- -- 3NA3 136-6 160 1
3RW40 55 134 3RT10 55-6A.36 3VL3 720 200 3VL3 720 200 3NA3 244-6 250 2
3RW40 56 162 3RT10 56-6A.36 3VL3 720 200 3VL3 720 200 3NA3 244-6 250 2
3RW40 73 230 3RT10 65-6A.36 3VL4 731 315 3VL5 731 315 2 x 3NA3 354-6 2 x 355 3
3RW40 74 280 3RT10 66-6A.36 3VL4 731 315 3VL5 731 315 2 x 3NA3 354-6 2 x 355 3
3RW40 75 356 3RT10 75-6A.36 3VL4 740 400 3VL5 740 400 2 x 3NA3 365-6 2 x 500 3
3RW40 76 432 3RT10 76-6A.36 3VL5 750 500 3VL5 750 500 2 x 3NA3 365-6 2 x 500 3
1) The type of coordination "2" refers to soft starters in combination with the
stipulated protective device (motor starter protector/circuit breaker/fuse),
not to any additional components in the feeder.

4/22 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40

■ Selection and ordering data

SIRIUS 3RW40 for normal starting (CLASS 10)

3RW40 2. 3RW40 3. 3RW40 4.

3RW ambient temperature 40 °C1) 3RW ambient temperature 50 °C1)

4
Size DT Normal starting (CLASS 10) PU PS* PG
Rated values of Rated values of (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie 230 V 400 V 500 V current Ie 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW A hp hp hp hp per PU
Rated operational voltage Ue 200 ... 480 V2)
• With screw terminals
12.5 3 5.5 -- 11 3 3 7.5 -- S0 } 3RW40 24-1BB@4 1 1 unit 131
25 5.5 11 -- 23 5 5 15 -- S0 } 3RW40 26-1BB@4 1 1 unit 131
32 7.5 15 -- 29 7.5 7.5 20 -- S0 } 3RW40 27-1BB@4 1 1 unit 131
38 11 18.5 -- 34 10 10 25 -- S0 } 3RW40 28-1BB@4 1 1 unit 131
• With spring-type terminals
12.5 3 5.5 -- 11 3 3 7.5 -- S0 B 3RW40 24-2BB@4 1 1 unit 131
25 5.5 11 -- 23 5 5 15 -- S0 B 3RW40 26-2BB@4 1 1 unit 131
32 7.5 15 -- 29 7.5 7.5 20 -- S0 B 3RW40 27-2BB@4 1 1 unit 131
38 11 18.5 -- 34 10 10 25 -- S0 B 3RW40 28-2BB@4 1 1 unit 131
• With screw or spring-type terminals
45 11 22 -- 42 10 15 30 -- S2 } 3RW40 36-@BB@4 1 1 unit 131
63 18.5 30 -- 58 15 20 40 -- S2 } 3RW40 37-@BB@4 1 1 unit 131
72 22 37 -- 62 20 20 40 -- S2 } 3RW40 38-@BB@4 1 1 unit 131
• With screw or spring-type terminals
80 22 45 -- 73 20 25 50 -- S3 } 3RW40 46-@BB@4 1 1 unit 131
106 30 55 -- 98 30 30 75 -- S3 } 3RW40 47-@BB@4 1 1 unit 131
Rated operational voltage Ue 400 ... 600 V
• With screw terminals
12.5 -- 5.5 7.5 11 -- -- 7.5 10 S0 B 3RW40 24-1BB@5 1 1 unit 131
25 -- 11 15 23 -- -- 15 20 S0 B 3RW40 26-1BB@5 1 1 unit 131
32 -- 15 18.5 29 -- -- 20 25 S0 B 3RW40 27-1BB@5 1 1 unit 131
38 -- 18.5 22 34 -- -- 25 30 S0 B 3RW40 28-1BB@5 1 1 unit 131
• With spring-type terminals
12.5 -- 5.5 7.5 11 -- -- 7.5 10 S0 B 3RW40 24-2BB@5 1 1 unit 131
25 -- 11 15 23 -- -- 15 20 S0 B 3RW40 26-2BB@5 1 1 unit 131
32 -- 15 18.5 29 -- -- 20 25 S0 B 3RW40 27-2BB@5 1 1 unit 131
38 -- 18.5 22 34 -- -- 25 30 S0 B 3RW40 28-2BB@5 1 1 unit 131
• With screw or spring-type terminals
45 -- 22 30 42 -- -- 30 40 S2 B 3RW40 36-@BB@5 1 1 unit 131
63 -- 30 37 58 -- -- 40 50 S2 B 3RW40 37-@BB@5 1 1 unit 131
72 -- 37 45 62 -- -- 40 60 S2 B 3RW40 38-@BB@5 1 1 unit 131
• With screw or spring-type terminals
80 -- 45 55 73 -- -- 50 60 S3 B 3RW40 46-@BB@5 1 1 unit 131
106 -- 55 75 98 -- -- 75 75 S3 B 3RW40 47-@BB@5 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals3) 2
Order No. supplement for rated control supply voltage Us
• 24 V AC/DC 0
• 110 ... 230 V AC/DC 1
1) 3)
Stand-alone installation without auxiliary fan. Main circuit connection: screw terminals.
2)
Soft starter with screw terminals: delivery time class } (preferred type).
Note:
The listed motor ratings are rough guide values. The soft starter • Maximum starting time in s: 10
should always be designed on the basis of the required rated • Maximum starting current in % of motor current Ie: 300
operational current of the motor. The 3RW40 soft starters are de-
signed for easy starting conditions. The selection and ordering • Maximum number of starts per hour in 1/h: 5
data were determined for the following boundary conditions (see Switching frequency can be increased by means of auxiliary
also the notes on page 4/6): fans.

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/23
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40

3RW40 2. 3RW40 3. 3RW40 4.

1) 1)
3RW ambient temperature 40 °C 3RW ambient temperature 50 °C Size DT Normal starting (CLASS 10) PU PS* PG
Rated values of Rated values of (UNIT,
induction motors induction motors SET, M)
4

Opera- Rating at Opera- Rating at

tional operational voltage Ue tional operational voltage Ue
current Ie 230 V 400 V 500 V current Ie 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW A hp hp hp hp per PU
Rated operational voltage Ue 200 ... 480 V2),
with thermistor motor protection,
rated control supply voltage Us 24 V AC/DC
• With screw terminals
12.5 3 5.5 -- 11 3 3 7.5 -- S0 } 3RW40 24-1TB04 1 1 unit 131
25 5.5 11 -- 23 5 5 15 -- S0 } 3RW40 26-1TB04 1 1 unit 131
32 7.5 15 -- 29 7.5 7.5 20 -- S0 } 3RW40 27-1TB04 1 1 unit 131
38 11 18.5 -- 34 10 10 25 -- S0 } 3RW40 28-1TB04 1 1 unit 131
• With spring-type terminals
12.5 3 5.5 -- 11 3 3 7.5 -- S0 B 3RW40 24-2TB04 1 1 unit 131
25 5.5 11 -- 23 5 5 15 -- S0 B 3RW40 26-2TB04 1 1 unit 131
32 7.5 15 -- 29 7.5 7.5 20 -- S0 B 3RW40 27-2TB04 1 1 unit 131
38 11 18.5 -- 34 10 10 25 -- S0 B 3RW40 28-2TB04 1 1 unit 131
• With screw or spring-type terminals
45 11 22 -- 42 10 15 30 -- S2 } 3RW40 36-@TB04 1 1 unit 131
63 18.5 30 -- 58 15 20 40 -- S2 } 3RW40 37-@TB04 1 1 unit 131
72 22 37 -- 62 20 20 40 -- S2 } 3RW40 38-@TB04 1 1 unit 131
• With screw or spring-type terminals
80 22 45 -- 73 20 25 50 -- S3 } 3RW40 46-@TB04 1 1 unit 131
106 30 55 -- 98 30 30 75 -- S3 } 3RW40 47-@TB04 1 1 unit 131
Rated operational voltage Ue 400 ... 600 V,
with thermistor motor protection,
rated control supply voltage Us 24 V AC/DC
• With screw terminals
12.5 -- 5.5 7.5 11 -- -- 7.5 10 S0 B 3RW40 24-1TB05 1 1 unit 131
25 -- 11 15 23 -- -- 15 20 S0 B 3RW40 26-1TB05 1 1 unit 131
32 -- 15 18.5 29 -- -- 20 25 S0 B 3RW40 27-1TB05 1 1 unit 131
38 -- 18.5 22 34 -- -- 25 30 S0 B 3RW40 28-1TB05 1 1 unit 131
• With spring-type terminals
12.5 -- 5.5 7.5 11 -- -- 7.5 10 S0 B 3RW40 24-2TB05 1 1 unit 131
25 -- 11 15 23 -- -- 15 20 S0 B 3RW40 26-2TB05 1 1 unit 131
32 -- 15 18.5 29 -- -- 20 25 S0 B 3RW40 27-2TB05 1 1 unit 131
38 -- 18.5 22 34 -- -- 25 30 S0 B 3RW40 28-2TB05 1 1 unit 131
• With screw or spring-type terminals
45 -- 22 30 42 -- -- 30 40 S2 B 3RW40 36-@TB05 1 1 unit 131
63 -- 30 37 58 -- -- 40 50 S2 B 3RW40 37-@TB05 1 1 unit 131
72 -- 37 45 62 -- -- 40 60 S2 B 3RW40 38-@TB05 1 1 unit 131
• With screw or spring-type terminals
80 -- 45 55 73 -- -- 50 60 S3 B 3RW40 46-@TB05 1 1 unit 131
106 -- 55 75 98 -- -- 75 75 S3 B 3RW40 47-@TB05 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals3) 2
1) Stand-alone installation without auxiliary fan. 3) Main circuit connection: screw terminals.
2)
Soft starter with screw terminals: delivery time class } (preferred type).
Note:
The listed motor ratings are rough guide values. The soft starter • Maximum starting time in s: 10
should always be designed on the basis of the required rated • Maximum starting current in % of motor current Ie: 300
operational current of the motor. The 3RW40 soft starters are de-
signed for easy starting conditions. • Maximum number of starts per hour in 1/h: 5
The selection and ordering data were determined for the follow- Switching frequency can be increased by means of auxiliary
ing boundary conditions (see also the notes on page 4/6): fans.

* You can order this quantity or a multiple thereof.

4/24 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40

3RW40 5. 3RW40 7.

3RW ambient temperature 40 °C1) 3RW ambient temperature 50 °C1) Size DT Normal starting (CLASS 10) PU PS* PG

4
Rated values of Rated values of (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie 230 V 400 V 500 V current Ie 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW A hp hp hp hp per PU
Rated operational voltage Ue 200 ... 460 V2)
• With screw or spring-type terminals
134 37 75 -- 117 30 40 75 -- S6 B 3RW40 55-@BB@4 1 1 unit 131
162 45 90 -- 145 40 50 100 -- B 3RW40 56-@BB@4 1 1 unit 131
• With screw or spring-type terminals
230 75 132 -- 205 60 75 150 -- S12 B 3RW40 73-@BB@4 1 1 unit 131
280 90 160 -- 248 75 100 200 -- B 3RW40 74-@BB@4 1 1 unit 131
356 110 200 -- 315 100 125 250 -- B 3RW40 75-@BB@4 1 1 unit 131
432 132 250 -- 385 125 150 300 -- B 3RW40 76-@BB@4 1 1 unit 131
Rated operational voltage Ue 400 ... 600 V3)
• With screw or spring-type terminals
134 -- 75 90 117 -- -- 75 100 S6 B 3RW40 55-@BB@5 1 1 unit 131
162 -- 90 110 145 -- -- 100 150 B 3RW40 56-@BB@5 1 1 unit 131
• With screw or spring-type terminals
230 -- 132 160 205 -- -- 150 200 S12 B 3RW40 73-@BB@5 1 1 unit 131
280 -- 160 200 248 -- -- 200 250 B 3RW40 74-@BB@5 1 1 unit 131
356 -- 200 250 315 -- -- 250 300 B 3RW40 75-@BB@5 1 1 unit 131
432 -- 250 315 385 -- -- 300 400 B 3RW40 76-@BB@5 1 1 unit 131
Order No. supplement for connection types4)
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us5)
• 115 V AC 3
• 230 V AC 4
1) 4)
Stand-alone installation. Main circuit connection: busbar connection.
2) 5)
Soft starter with screw terminals: delivery time class } (preferred type). Control by way of the internal 24 V DC supply and direct control by means
3) Soft starter with screw terminals: delivery time class A. of PLC possible.

Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The 3RW40 solid-state soft starters are designed for easy start-
ing conditions. The selection and ordering data were deter-
mined for the following boundary conditions (see also the notes
on page 4/6):
• Maximum starting time in s: 10
• Maximum starting current in % of motor current Ie: 300
• Maximum number of starts per hour in 1/h: 5
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/25
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40
SIRIUS 3RW40 for heavy starting (CLASS 20)

3RW40 2. 3RW40 3. 3RW40 4.

1) 1)
3RW ambient temperature 40 °C 3RW ambient temperature 50 °C Size DT Heavy starting (CLASS 20) PU PS* PG
Rated values of Rated values of (UNIT,
induction motors induction motors SET, M)
4

Opera- Rating at Opera- Rating at

tional operational voltage Ue tional operational voltage Ue
current Ie 230 V 400 V 500 V current Ie 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW A hp hp hp hp per PU

Rated operational voltage Ue 200 ... 480 V2)

• With screw terminals
12.5 3 5.5 -- 11 3 3 7.5 -- S0 } 3RW40 26-1BB@4 1 1 unit 131
25 5.5 11 -- 23 5 5 15 -- S0 } 3RW40 27-1BB@4 1 1 unit 131
• With spring-type terminals
12.5 3 5.5 -- 11 3 3 7.5 -- S0 B 3RW40 26-2BB@4 1 1 unit 131
25 5.5 11 -- 23 5 5 15 -- S0 B 3RW40 27-2BB@4 1 1 unit 131
• With screw or spring-type terminals
32 7.5 15 -- 29 7.5 7.5 20 -- S2 } 3RW40 36-@BB@4 1 1 unit 131
38 11 18.5 -- 34 10 10 25 -- S2 } 3RW40 37-@BB@4 1 1 unit 131
45 11 22 -- 42 10 15 30 -- S2 } 3RW40 37-@BB@4 1 1 unit 131
63 18.5 30 -- 58 15 20 40 -- S3 } 3RW40 47-@BB@4 1 1 unit 131
72 22 37 -- 62 20 20 40 -- S3 } 3RW40 47-@BB@4 1 1 unit 131
Rated operational voltage Ue 400 ... 600 V
• With screw terminals
12.5 -- 5.5 7.5 11 -- -- 7.5 10 S0 B 3RW40 26-1BB@5 1 1 unit 131
25 -- 11 15 23 -- -- 15 20 S0 B 3RW40 27-1BB@5 1 1 unit 131
• With spring-type terminals
12.5 -- 5.5 7.5 11 -- -- 7.5 10 S0 B 3RW40 26-2BB@5 1 1 unit 131
25 -- 11 15 23 -- -- 15 20 S0 B 3RW40 27-2BB@5 1 1 unit 131
• With screw or spring-type terminals
32 -- 15 18.5 29 -- -- 20 25 S2 B 3RW40 36-@BB@5 1 1 unit 131
38 -- 18.5 22 34 -- -- 25 30 S2 B 3RW40 37-@BB@5 1 1 unit 131
45 -- 22 30 42 -- -- 30 40 S2 B 3RW40 37-@BB@5 1 1 unit 131
63 -- 30 37 58 -- -- 40 50 S3 B 3RW40 47-@BB@5 1 1 unit 131
72 -- 37 45 62 -- -- 40 60 S3 B 3RW40 47-@BB@5 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals3) 2
Order No. supplement for rated control supply voltage Us
• 24 V AC/DC 0
• 110 ... 230 V AC/DC 1
1) 3)
Stand-alone installation without auxiliary fan. Main circuit connection: screw terminals.
2) Soft starter with screw terminals: delivery time class } (preferred type).
Note:
The listed motor ratings are rough guide values. The soft starter In the event of more exacting requirements, it may be necessary
should always be designed on the basis of the required rated to choose a larger device. However, in some cases the de-
operational current of the motor. signed-in safety reserves also permit the listed units to be used
The 3RW40 solid-state soft starters are designed for easy start- in boundary conditions which are slightly more demanding. De-
ing conditions. The selection and ordering data were deter- tailed technical information for a configuration which is tailored
mined for the following boundary conditions (see also the notes exactly to the application can be found in the manuals. Siemens
on page 4/6): recommends the use of the selection and simulation program
Win-Soft Starter.
• Maximum starting time in s: 20
• Maximum starting current in % of motor current Ie: 300
• Maximum number of starts per hour in 1/h: 5
Switching frequency can be increased by means of auxiliary
fans.

* You can order this quantity or a multiple thereof.

4/26 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40

3RW40 2. 3RW40 3. 3RW40 4.

1) 1)
3RW ambient temperature 40 °C 3RW ambient temperature 50 °C Size DT Heavy starting (CLASS 20) PU PS* PG
Rated values of Rated values of (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at

4
tional operational voltage Ue tional operational voltage Ue
current Ie 230 V 400 V 500 V current Ie 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW A hp hp hp hp per PU

Rated operational voltage Ue 200 ... 480 V2),

with thermistor motor protection,
rated control supply voltage Us 24 V AC/DC
• With screw terminals
12.5 3 5.5 -- 11 3 3 7.5 -- S0 } 3RW40 26-1TB04 1 1 unit 131
25 5.5 11 -- 23 5 5 15 -- S0 } 3RW40 27-1TB04 1 1 unit 131
• With spring-type terminals
12.5 3 5.5 -- 11 3 3 7.5 -- S0 B 3RW40 26-2TB04 1 1 unit 131
25 5.5 11 -- 23 5 5 15 -- S0 B 3RW40 27-2TB04 1 1 unit 131
• With screw or spring-type terminals
32 7.5 15 -- 29 7.5 7.5 20 -- S2 } 3RW40 36-@TB04 1 1 unit 131
38 11 18.5 -- 34 10 10 25 -- S2 } 3RW40 37-@TB04 1 1 unit 131
45 11 22 -- 42 10 15 30 -- S2 } 3RW40 37-@TB04 1 1 unit 131
63 18.5 30 -- 58 15 20 40 -- S3 } 3RW40 47-@TB04 1 1 unit 131
72 22 37 -- 62 20 20 40 -- S3 } 3RW40 47-@TB04 1 1 unit 131
Rated operational voltage Ue 400 ... 600 V,
with thermistor motor protection,
rated control supply voltage Us 24 V AC/DC
• With screw terminals
12.5 -- 5.5 7.5 11 -- -- 7.5 10 S0 B 3RW40 26-1TB05 1 1 unit 131
25 -- 11 15 23 -- -- 15 20 S0 B 3RW40 27-1TB05 1 1 unit 131
• With spring-type terminals
12.5 -- 5.5 7.5 11 -- -- 7.5 10 S0 B 3RW40 26-2TB05 1 1 unit 131
25 -- 11 15 23 -- -- 15 20 S0 B 3RW40 27-2TB05 1 1 unit 131
• With screw or spring-type terminals
32 -- 15 18.5 29 -- -- 20 25 S2 B 3RW40 36-@TB05 1 1 unit 131
38 -- 18.5 22 34 -- -- 25 30 S2 B 3RW40 37-@TB05 1 1 unit 131
45 -- 22 30 42 -- -- 30 40 S2 B 3RW40 37-@TB05 1 1 unit 131
63 -- 30 37 58 -- -- 40 50 S3 B 3RW40 47-@TB05 1 1 unit 131
72 -- 37 45 62 -- -- 40 60 S3 B 3RW40 47-@TB05 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals3) 2
1) Stand-alone installation without auxiliary fan. 3) Main circuit connection: screw terminals.
2)
Soft starter with screw terminals: delivery time class } (preferred type).
Note:
The listed motor ratings are rough guide values. The soft starter In the event of more exacting requirements, it may be necessary
should always be designed on the basis of the required rated to choose a larger device. However, in some cases the de-
operational current of the motor. signed-in safety reserves also permit the listed units to be used
The 3RW40 solid-state soft starters are designed for easy start- in boundary conditions which are slightly more demanding. De-
ing conditions. The selection and ordering data were deter- tailed technical information for a configuration which is tailored
mined for the following boundary conditions (see also the notes exactly to the application can be found in the manuals. Siemens
on page 4/6): recommends the use of the selection and simulation program
Win-Soft Starter.
• Maximum starting time in s: 20
• Maximum starting current in % of motor current Ie: 300
• Maximum number of starts per hour in 1/h: 5
Switching frequency can be increased by means of auxiliary
fans.

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/27
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40
)

3RW40 5. 3RW40 7.

3RW ambient temperature 40 °C1) 3RW ambient temperature 50 °C1) Size DT Heavy starting (CLASS 20) PU PS* PG
(UNIT,
4

Rated values of Rated values of

induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW A hp hp hp hp per PU
Rated operational voltage Ue 200 ... 460 V2)
• With screw or spring-type terminals
80 22 45 -- 73 20 25 50 -- S6 B 3RW40 55-@BB@4 1 1 unit 131
106 30 55 -- 98 25 30 60 -- S6 B 3RW40 55-@BB@4 1 1 unit 131
134 37 75 -- 117 30 40 75 -- S6 B 3RW40 56-@BB@4 1 1 unit 131
162 45 90 -- 145 40 50 100 -- S12 B 3RW40 73-@BB@4 1 1 unit 131
230 75 132 -- 205 60 75 150 -- S12 B 3RW40 74-@BB@4 1 1 unit 131
280 90 160 -- 248 75 100 200 -- S12 B 3RW40 75-@BB@4 1 1 unit 131
356 110 200 -- 315 100 125 250 -- S12 B 3RW40 76-@BB@4 1 1 unit 131
Rated operational voltage Ue 400 ... 600 V3)
• With screw or spring-type terminals
80 -- 45 55 73 -- -- 50 60 S6 B 3RW40 55-@BB@5 1 1 unit 131
106 -- 55 75 98 -- -- 60 75 S6 B 3RW40 55-@BB@5 1 1 unit 131
134 -- 75 90 117 -- -- 75 100 S6 B 3RW40 56-@BB@5 1 1 unit 131
162 -- 90 110 145 -- -- 100 150 S12 B 3RW40 73-@BB@5 1 1 unit 131
230 -- 132 160 205 -- -- 150 200 S12 B 3RW40 74-@BB@5 1 1 unit 131
280 -- 160 200 248 -- -- 200 250 S12 B 3RW40 75-@BB@5 1 1 unit 131
356 -- 200 250 315 -- -- 250 300 S12 B 3RW40 76-@BB@5 1 1 unit 131
Order No. supplement for connection types4)
• With spring-type terminals 2
• With screw terminals 6
5)
Order No. supplement for the rated control supply voltage Us
• 115 V AC 3
• 230 V AC 4
1) 4)
Stand-alone installation. Main circuit connection: busbar connection.
2) Soft starter with screw terminals: delivery time class } (preferred type). 5) Control by way of the internal 24 V DC supply and direct control by means
3) of PLC possible.
Soft starter with screw terminals: delivery time class A.
Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The 3RW40 solid-state soft starters are designed for easy start-
ing conditions. The selection and ordering data were deter-
mined for the following boundary conditions (see also the notes
on page 4/6):
• Maximum starting time in s: 40
• Maximum starting current in % of motor current Ie: 350
• Maximum number of starts per hour in 1/h: 1
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

4/28 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40
Accessories
Conductor cross-section Tighten- For DT Order No. Price PU PS* PG
Solid or Finely AWG ing soft starters per PU (UNIT,
stranded stranded cables, torque size SET, M)
with end solid or
sleeve stranded
mm² mm² AWG Nm
Three-phase feeder terminals
2.5 ... 16 2.5 ... 16 10 ... 4 3 ... 4 S0 A 3RV29 25-5AB 1 1 unit 101
(3RW40 2.)

3RV29 25-5AB

4
For soft starters Version DT Order No. Price PU PS* PG
Type Size per PU (UNIT,
SET, M)

Box terminal blocks for soft starters

For round and ribbon cables
(2 units required for each device)
3RW40 5. S6 • Up to 70 mm2 } 3RT19 55-4G 1 1 unit 101
• Up to 120 mm2 } 3RT19 56-4G 1 1 unit 101
Auxiliary conductor connection B 3TX7 500-0A 1 1 unit 101
for box terminals
3RW40 7. S12 • Up to 240 mm2 } 3RT19 66-4G 1 1 unit 101
(with auxiliary conductor
connection)
Auxiliary terminals
Auxiliary terminals, 3-pole
3RW40 4. S3 B 3RT19 46-4F 1 1 unit 101
Covers for soft starters
Terminal covers for box terminals
Additional touch protection to be fitted at the box termi-
nals (2 units required per device)
3RW40 3. S2 } 3RT19 36-4EA2 1 1 unit 101
3RW40 4. S3 } 3RT19 46-4EA2 1 1 unit 101
3RW40 5. S6 } 3RT19 56-4EA2 1 1 unit 101
3RW40 7. S12 } 3RT19 66-4EA2 1 1 unit 101
Terminal covers for cable lugs and busbar connections
3RW40 4. S3 For complying with the phase } 3RT19 46-4EA1 1 1 unit 101
3RW40 5. S6 clearances and as touch protec- } 3RT19 56-4EA1 1 1 unit 101
3RW40 7. S12 tion if box terminal is removed } 3RT19 66-4EA1 1 1 unit 101
(2 units required per device)

Also fits in case of S6 and S12 on mounted box terminals

Sealing covers
3RW40 2. S0 } 3RW49 00-0PB10 1 1 unit 131
3RW40 3. S2
3RW40 4. S3
3RW40 5. S6 } 3RW49 00-0PB00 1 1 unit 131
3RW40 7. S12

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/29
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40

For soft starters Version DT Order No. Price PU PS* PG

Type Size per PU (UNIT,
SET, M)

Modules for RESET1)

Modules for remote RESET, electrical
Operating range 0.85 ... 1.1 x Us,
power consumption AC 80 VA, DC 70 W,
ON period 0.2 ... 4 s,
switching frequency 60/h
3RW40 5. S6 • 24 ... 30 V AC/DC } 3RU19 00-2AB71 1 1 unit 101
3RW40 7. S12 • 110 ... 127 V AC/DC } 3RU19 00-2AF71 1 1 unit 101
• 220 ... 250 V AC/DC } 3RU19 00-2AM71 1 1 unit 101
4

Mechanical RESET comprising

3RW40 5. S6 • Resetting plungers, holders and } 3RU19 00-1A 1 1 unit 101
3RW40 7. S12 formers
• Suitable pushbutton IP65, B 3SB30 00-0EA11 1 1 unit 102
Ø 22 mm, 12 mm stroke
• Extension plungers A 3SX13 35 1 1 unit 102

Cable releases with holder for RESET

For Ø 6.5 mm holes in the control panel;
max. control panel thickness 8 mm
3RW40 5. S6 • Length 400 mm } 3RU19 00-1B 1 1 unit 101
3RW40 7. S12 • Length 600 mm } 3RU19 00-1C 1 1 unit 101

1)
Remote RESET already integrated in the 3RW40 2. to
3RW40 4. soft starters.

For soft starters DT Order No. Price PU PS* PG

Type Size per PU (UNIT,
SET, M)

Fans (to increase switching frequency and for device mounting in

positions different from the normal position)
3RW40 2. S0 } 3RW49 28-8VB00 1 1 unit 131
3RW40 3. S2 } 3RW49 47-8VB00 1 1 unit 131
3RW40 4. S3

Manuals 3RW30/3RW401)
3RW40 2. S0 C 3ZX10 12-0RW30-1AB1 1 1 unit 191
3RW40 3. S2
3RW40 4. S3
3RW40 5. S6
3RW40 7. S12
Operating instructions1)
3RW40 2. S0 3ZX10 12-0RW40-1AA1
3RW40 3. S2
3RW40 4. S3
3RW40 5. S6 3ZX10 12-0RW40-2DA1
3RW40 7. S12
1)
The operating instructions are included in the scope of supply of the soft
starter or are available – like the manual – as a PDF download from the
Service&Support portal at
www.siemens.com/industrial-controls/support --> Controls --> Soft Starters
and Solid-State Switching Devices --> SIRIUS 3RW Soft Starters.

* You can order this quantity or a multiple thereof.

4/30 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40

For soft starters Motor starter protectors DT Order No. Price PU PS* PG
Type Size Size per PU (UNIT,
SET, M)

Link modules to motor starter protectors1)

• With screw terminals
3RW40 2. S0 S00/S0 A 3RA29 21-1BA00 1 1 unit 101
3RW40 36. S2 S2 } 3RA19 31-1AA00 1 1 unit 101
3RW40 46., S3 S3 } 3RA19 41-1AA00 1 1 unit 101
3RW40 47.
• With spring-type terminals
3RW40 2. S0 S0 A 3RA29 21-2GA00 1 1 unit 101

4
1)
Can be used in size S0 up to maximum 32 A.
Can be used in size S0 only for 3RV2 motor starter protectors.

Version DT Order No. Price PU PS* PG

per PU (UNIT,
SET, M)

Tools for opening spring-type terminals for sizes S00 and S0

Spring-type terminals

Screwdrivers A 3RA29 08-1A 1 1 unit 101

for all SIRIUS devices with spring-type terminals
length approx. 200 mm, 3.0 mm x 0.5 mm,
3RA29 08-1A titanium gray/black, partially insulated
Blank labels
Unit labeling plates1) D 3RT19 00-1SB20 100 340 units 101
for SIRIUS devices
20 mm x 7 mm, pastel turquoise
NSB0_01429b

3RT19 00-1SB20

Spare parts

For soft starters Version DT Order No. Price PU PS* PG

Type Size Rated control supply per PU (UNIT,
voltage Us SET, M)

Fans
Fans
3RW40 5.-.BB3. S6 115 V AC } 3RW49 36-8VX30 1 1 unit 131
3RW40 5.-.BB4. S6 230 V AC } 3RW49 36-8VX40 1 1 unit 131
3RW40 7.-.BB3. S12 115 V AC } 3RW49 47-8VX30 1 1 unit 131
3RW40 7.-.BB4. S12 230 V AC } 3RW49 47-8VX40 1 1 unit 131

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/31
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40

■ More information
Application examples for normal starting (CLASS 10)
Normal starting CLASS 10 (up to 20 s with 350 % In motor)
The soft starter rating can be selected to be as high as the rating of the motor used.
Application Conveyor belt Roller conveyor Compressor Small fan1) Pump Hydraulic pump
Starting parameters
• Voltage ramp and current
limiting
- Starting voltage % 70 60 50 40 40 40
- Starting time s 10 10 10 10 10 10
- Current limit value 5 x IM 5 x IM 4 x IM 4 x IM 4 x IM 4 x IM
Ramp-down time s 5 5 0 0 10 0
4

1)
The mass inertia of the fan is <10 times the mass inertia of the motor.

Application examples for heavy starting (CLASS 20)

Heavy starting CLASS 20 (up to 40 s with 350 % In motor)
The soft starter has to be selected at least one performance class higher than the motor used.
Application Stirrer Centrifuge
Starting parameters
• Voltage ramp and current
limiting
- Starting voltage % 40 40
- Starting time s 20 20
- Current limit value 4 x IM 4 x IM
Ramp-down time 0 0

Note:
These tables present sample set values and device sizes. They
are intended only for the purposes of information and are not
binding. The set values depend on the application in question
and must be optimized during commissioning.
The soft starter dimensions should be checked where necessary
with the Win-Soft Starter software or with the help of Technical
Assistance.

4/32 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW30, 3RW40 for Standard Applications
3RW40
Configuration Status graphs
The 3RW solid-state soft starters are designed for easy starting
conditions. In the event of deviating conditions or increased U
UN
switching frequency, it may be necessary to choose a larger de-
vice. For accurate dimensioning, use the Win-Soft Starter selec-
US
tion and simulation program.
Where long starting times are involved, the integrated solid-state tR on tR off t
overload relay for heavy starting should not be disconnected.
PTC sensors are recommended. This also applies for the smooth
ramp-down because during the ramp-down time an additional ON 13/14
current loading applies in contrast to free ramp-down. RUN 13/14
In the case of high switching frequencies in S4 mode, Siemens BYPASSED 23/24
recommends the use of PTC sensors. For corresponding device tR on tR off t
versions with integrated thermistor motor protection or separate

4
thermistor evaluation devices see Chapter 8 "Monitoring and I
Control Devices". xIe

NSB0_01486
No capacitive elements are permitted in the motor feeder be- Ie
tween the SIRIUS 3RW soft starter and the motor (e. g. no reac-
tive-power compensation equipment). In addition, neither static tR on t
systems for reactive-power compensation nor dynamic PFC
(Power Factor Correction) must be operated in parallel during Manual for SIRIUS 3RW30/40
starting and ramp-down of the soft starter. This is important to
prevent faults arising on the compensation equipment and/or the Besides containing all important information on configuring,
soft starter. commissioning and servicing, the manual also contains exam-
ple circuits and the technical specifications for all devices.
All elements of the main circuit (such as fuses and controls)
should be dimensioned for direct starting, following the local Win-Soft Starter selection and simulation program
short-circuit conditions. Fuses, controls and overload relays
must be ordered separately. Please observe the maximum With this software, you can simulate and select all Siemens soft
switching frequencies specified in the technical specifications. starters, taking into account various parameters such as mains
properties, motor and load data, and special application
Note: requirements.
When induction motors are switched on, voltage drops occur as
a rule on starters of all types (direct starters, wye-delta starters, The software is a valuable tool, which makes complicated,
soft starters). The infeed transformer must always be dimen- lengthy manual calculations for determining the required soft
sioned such that the voltage dip when starting the motor remains starters superfluous.
within the permissible tolerance. If the infeed transformer is di- The Win-Soft Starter selection and simulation program can be
mensioned with only a small margin, it is best for the control volt- downloaded from:
age to be supplied from a separate circuit (independently of the www.siemens.com/softstarter --> Software
main voltage) in order to avoid the potential switching off of the
soft starter. More information about soft starters can be found on the Internet
at:
Schematic circuit diagram of power electronics www.siemens.com/softstarter
Training course for SIRIUS soft starters (SD-SIRIUSO)
L1 L2 L3
Siemens offers a 2-day training course on the SIRIUS solid-state
soft starters to keep customers and own personnel up-to-date on
configuring, commissioning and maintenance issues.
You can find more information on our SITRAIN website:
NSB0_001485a

www.siemens.com/sitrain
--> For course name select "SD-SIRIUSO"
T1 T2 T3 Please direct enquiries and applications to SITRAIN Customer
Support:
A bypass contact system and solid-state overload relay are al- Tel.: +49 (1805) 23 56 11
ready integrated in the 3RW40 soft starter and therefore do not Fax: +49 (1805) 23 56 12
have to be ordered separately. E-mail: info@sitrain.com

Siemens IC 10 · 2011 4/33

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44
As a further option the SIRIUS 3RW44 soft starters can be up-
■ Overview graded with a PROFIBUS DP module. Thanks to their communi-
In addition to soft starting and soft ramp-down, the solid-state cation capability and their programmable control inputs and re-
SIRIUS 3RW44 soft starters provide numerous functions for lay outputs the SIRIUS 3RW44 soft starters can be very easily
higher-level requirements. They cover a performance range up and quickly integrated in higher-level controllers.
to 710 kW (at 400 V) in the inline circuit and up to 1200 kW (at In addition a creep speed function is available for positioning
400 V) in the inside-delta circuit. and setting jobs. With this function the motor can be controlled
The 3RW44 soft starters are characterized by a compact design in both directions of rotation with reduced torque and an adjust-
for space-saving and clearly arranged control cabinet layouts. able, low speed.
For optimized motor starting and stopping the innovative On the other hand the SIRIUS 3RW44 soft starters offer a new,
SIRIUS 3RW44 soft starters are an attractive alternative with con- combined DC braking function for the fast stopping of driving
siderable savings potential compared to applications with a fre- loads.
quency converter. The new torque control and adjustable cur-
rent limiting enable the High-Feature soft starters to be used in Highlights
4

nearly every conceivable task. They guarantee the reliable • Soft starting with breakaway pulse, torque control or voltage
avoidance of sudden torque applications and current peaks dur- ramp, adjustable torque or current limiting as well as any com-
ing motor starting and stopping. This creates savings potential bination of these, depending on load type
when calculating the size of the switchgear and when servicing
the machinery installed. Be it for inline circuits or inside-delta cir- • Integrated bypass contact system to minimize power loss
cuits – the SIRIUS 3RW44 soft starter offers savings especially in • Various setting options for the starting parameters such as
terms of size and equipment costs. starting torque, starting voltage, ramp-up and ramp-down
time, and much more in three separate parameter sets
The bypass contacts already integrated in the soft starter by-
pass the thyristors after a motor ramp-up is detected. This re- • Start-up detection
sults in a further great reduction in the heat loss occuring during • Inside-delta circuit for savings in terms of size and equipment
operation of the soft starter at rated value. costs
Combinations of various starting, operating and ramp-down • Various ramp-down modes selectable: free ramp-down,
possibilities ensure an optimum adaptation to the application- torque-controlled pump ramp-down, combined DC braking
specific requirements. Operation and commissioning can be • Solid-state motor overload and intrinsic device protection
performed with the menu-controlled keypad and a menu-
• Thermistor motor protection
prompted, multi-line graphic display with background lighting.
The optimized motor ramp-up and ramp-down can be effected • Keypad with a menu-prompted, multi-line graphic display with
quickly, easily and reliably by means of just a few settings with a background lighting
previously selected language. Four-key operation and plain-text • Interface for communication with the PC for more accurate set-
displays for each menu point guarantee full clarity at every mo- ting of the parameters as well as for control and monitoring
ment of the parameterization and operation.
• Simple adaptation to the motor feeder
Applicable standards • Simple mounting and commissioning
• IEC 60947-4-2 • Display of operating states and fault messages
• UL/CSA • Connection to PROFIBUS with optional PROFIBUS DP module
Functionality • External display and operator module
Equipped with modern, ergonomic user prompting the 3RW44 • Mains voltages from 200 to 690 V, 50 to 60 Hz
soft starters can be commissioned quickly and easily using a • Can be used up to 60 °C (derating from 40 °C)
keypad and a menu-prompted, multi-line graphic display with
background lighting. The optimized motor ramp-up and ramp- Soft Starter ES parameterization software1)
down can be effected quickly, easily and reliably by means of Soft Starter ES software is used for the parameterization, moni-
just a few settings with a selectable language. Four-key opera- toring and service diagnostics of SIRIUS 3RW44 High Feature
tion and plain-text displays for each menu point guarantee full soft starters.
clarity at every moment of the parameterization and operation.
During operation and when control voltage is applied, the dis- SIRIUS 3RW44 Soft Starter Function Block Library for
play field continuously presents measured values and operating SIMATIC PCS 71)
values as well as warnings and fault messages. An external dis- The SIRIUS 3RW44 soft starter PCS 7 function block library can
play and operator module can be connected by means of a con- be used for simple and easy integration of SIRIUS 3RW44 soft
nection cable to the soft starter, thus enabling active indications starters into the SIMATIC PCS 7 process control system.
and the like to be read directly from the control cabinet door. 1)
See Chapter 12 "Planning, Configuration and Visualizing for SIRIUS".
The SIRIUS 3RW44 soft starters are equipped with optimum
functionality. An integral bypass contact system reduces the ■ Application
power loss of the soft starter during operation.
This reliably prevents heating of the switchgear environment. The SIRIUS 3RW44 solid-state soft starters are suitable for the
The SIRIUS 3RW44 soft starters have internal intrinsic device torque-controlled soft starting and smooth ramp-down as well as
protection. This prevents thermal overloading of the power sec- braking of three-phase asynchronous motors.
tion's thyristors, e. g. due to unacceptably high closing
operations. Application areas
Wiring outlay for installing an additional motor overload relay is See "Selection aid for soft starters" on page 4/6.
no longer needed as the SIRIUS 3RW44 soft starters perform
this function too. In addition they offer adjustable trip classes
and a thermistor motor protection function. As an option the thy-
ristors can also be protected by SITOR semiconductor fuses
from short-circuiting so that the soft starter is still functional after
a short circuit (coordination type "2"). And even inrush current
peaks are reliably avoided thanks to adjustable current limiting.

4/34 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

■ Technical specifications
Type 3RW44 2. 3RW44 3. 3RW44 4. 3RW44 5. 3RW44 6.
Mechanics and environment
Mounting dimensions (WxHxD)
• Screw terminals mm 170 x 184 x 270 170 x 198 x 270 210 x 230 x 298 510 x 638.5 x 290 576 x 667 x 290
• Spring-type terminals mm 170 x 184 x 270 170 x 198 x 270 210 x 230 x 298 510 x 638.5 x 290 576 x 667 x 290
H

D
W

Permissible ambient temperature

Operation °C 0 ... +60; (derating from +40)
Storage °C -25 ... +80
Weight kg 6.5 7.9 11.5 50 78

4
NSB0_00649a
Permissible mounting position 22,5° 22,5°
90° 90°

Installation type Stand-alone


installation     ุPP ุLQ 
ุPP ุLQ 

B
  
  
 ุPP ุLQ 


Permissible installation altitude m 5 000 (derating from 1000, see Characteristic curves page 4/7); higher on request
Degree of protection IP00

Type 3RW44 . .-.BC3. 3RW44 . .-.BC4.

Terminal
Control electronics
Rated values
Rated control supply voltage A1/A2/PE V 115 AC 230 AC
• Tolerance % -15/+10 -15/+10
Rated frequency Hz 50 ... 60 50 ... 60
• Tolerance % ±10 ±10

Type 3RW44 . .-.BC.4 3RW44 . .-.BC.5 3RW44 . .-.BC.6

Power electronics
Rated operational voltage for inline circuit V AC 200 ... 460 400 ... 600 400 ... 690
Tolerance % -15/+10 -15/+10 -15/+10
Maximum blocking voltage (thyristor) V AC 1 400 1 800 1 800
Rated operational voltage for inside-delta circuit V AC 200 ... 460 400 ... 600 400 ... 600
Tolerance % -15/+10 -15/+10 -15/+10
Rated frequency Hz 50 ... 60
Tolerance % ±10
Uninterrupted duty at 40 °C (% of Ie) % 115
Minimum load (% of set motor current IM) % 8
Maximum cable length between soft starter and motor m 5001)
1)
At the project configuration stage, it is important to make allowance for the
voltage drop on the motor cable up to the motor connection. If necessary,
higher values for the rated operational voltage or current must be calcu-
lated accordingly for the soft starter.

Siemens IC 10 · 2011 4/35

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44
Motor feeders with soft starters
ToC Type of coordination "1" according to IEC 60947-4-1:
The type of coordination to which the motor feeder with soft 1
After a short-circuit incident the unit is defective
starter is mounted depends on the application-specific require- therefore unsuitable for further use (protection of per-
ments. Normally, fuseless mounting (combination of motor sons and equipment guaranteed).
starter protector/circuit breaker and soft starter) is sufficient.
If type of coordination "2" is to be fulfilled, semiconductor fuses ToC Type of coordination "2" according to IEC 60947-4-1:
2
must be fitted in the motor feeder. After a short-circuit incident the unit is suitable for
further use (protection of persons and equipment
guaranteed).

The type of coordination refers to soft starters in

combination with the stipulated protective device
(motor starter protector/circuit breaker/fuse), not to
any additional components in the feeder.
4

The types of coordination are indicated in the corre-

sponding tables by the symbols shown on orange
backgrounds.

Inline circuit fuseless version

Q1

Q11
NSB0_01016b

M
3~

Soft starters Motor starter protectors/circuit breakers1)

ToC
1 Rated current 440 V +10 % Rated current
Q11 Q1
Type A Type A
Type of coordination "1": 3RW44 22 ... 3RW44 27: Iq = 32 kA; 3RW44 34 and 3RW44 35: Iq = 16 kA; 3RW44 36 ... 3RW44 66: Iq = 65 kA
3RW44 22 29 3RV10 42-4HA10 50
3RW44 23 36 3RV10 42-4JA10 63
3RW44 24 47 3RV10 42-4KA10 75
3RW44 25 57 3RV10 42-4LA10 90
3RW44 26 77 3RV10 42-4MA10 100
3RW44 27 93 3RV10 42-4MA10 100
3RW44 34 113 3VL17 16-2DD36 160
3RW44 35 134 3VL17 16-2DD36 160

3RW44 36 162 3VL37 25-2DC36 250

3RW44 43 203 3VL47 31-3DC36 315
3RW44 44 250 3VL47 31-3DC36 315
3RW44 45 313 3VL47 40-3DC36 400
3RW44 46 356 3VL47 40-3DC36 400
3RW44 47 432 3VL57 50-3DC36 500
3RW44 53 551 3VL67 80-3AB36 800
3RW44 54 615 3VL67 80-3AB36 800
3RW44 55 693 3VL67 80-3AB36 800
3RW44 56 780 3VL77 10-3AB36 1 000
3RW44 57 880 3VL77 10-3AB36 1 000
3RW44 58 970 3VL77 12-3AB36 1 250
3RW44 65 1 076 3VL77 12-3AB36 1 250
3RW44 66 1 214 3VL77 12-3AB36 1 250
1)
The rated motor current must be considered when selecting the devices.

4/36 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

Inline circuit fused version (line protection only)

F1

Q21

Q11

NSB0_01477b
M
3~

Soft starters ToC Line fuses, maximum Line contactor up to 400 V Braking contactors1)2)
1
Rated current 690 V +5 % Rated current Size (optional) (for example circuit see the 3RW44

4
manual)
Q11 F1 Q21 Q91 Q92
Type A Type A Type Type Type
Type of coordination "1"3): Iq = 65 kA
3RW44 22 29 3NA3 820-6 50 00 3RT10 34 3RT15 26 --
3RW44 23 36 3NA3 822-6 63 00 3RT10 35 3RT15 26 --
3RW44 24 47 3NA3 824-6 80 00 3RT10 36 3RT15 35 --
3RW44 25 57 3NA3 830-6 100 00 3RT10 44 3RT15 35 --
3RW44 26 77 3NA3 132-6 125 1 3RT10 45 3RT10 24 3RT10 35
3RW44 27 93 3NA3 136-6 160 1 3RT10 46 3RT10 25 3RT10 36
3RW44 34 113 3NA3 244-6 250 2 3RT10 54 3RT10 34 3RT10 44
3RW44 35 134 3NA3 244-6 250 2 3RT10 55 3RT10 36 3RT10 45
3RW44 36 162 3NA3 365-6 500 3 3RT10 56 3RT10 44 3RT10 45
3RW44 43 203 2 x 3NA3 354-6 2 x 355 3 3RT10 64 3RT10 44 3RT10 54
3RW44 44 250 2 x 3NA3 354-6 2 x 355 3 3RT10 65 3RT10 44 3RT10 55
3RW44 45 313 2 x 3NA3 365-6 2 x 500 3 3RT10 75 3RT10 54 3RT10 56
3RW44 46 356 2 x 3NA3 365-6 2 x 500 3 3RT10 75 3RT10 54 3RT10 56
3RW44 47 432 2 x 3NA3 365-6 2 x 500 3 3RT10 76 3RT10 55 3RT10 64
3RW44 53 551 2 x 3NA3 365-6 2 x 500 3 3TF68 3RT10 64 3RT10 66
3RW44 54 615 2 x 3NA3 365-6 2 x 500 3 3TF68 3RT10 64 3RT10 75
3RW44 55 693 2 x 3NA3 365-6 2 x 500 3 3TF69 3RT10 65 3RT10 75
3RW44 56 780 2 x 3NA3 365-6 2 x 500 3 3TF69 3RT10 65 3RT10 75
3RW44 57 880 2 x 3NA3 365-6 2 x 500 3 -- 3RT10 75 3RT10 76
3RW44 58 970 3 x 3NA3 365-6 3 x 500 3 -- 3RT10 75 3RT10 76
3RW44 65 1 076 3 x 3NA3 365-6 3 x 500 3 -- 3RT10 75 3TF68
3RW44 66 1 214 3 x 3NA3 365-6 3 x 500 3 -- 3RT10 76 3TF68
1) 3)
If the ramp-down function "Combined braking" is selected, no braking con- The type of coordination "1" refers to soft starters in combination with the
tactor is required. stipulated fuse, not to any additional components in the feeder.
If the ramp-down function "DC braking" is selected, a braking contactor
must be used in addition (see table for type).
For applications with large centrifugal masses (JLoad > JMotor) we recom-
mend the function "DC braking".
2)
Additional auxiliary relay K4:
LZX:RT4A4T30
(3RW44 soft starter with rated control supply voltage 230 V AC),
LZX:RT4A4S15
(3RW44 soft starter with rated control supply voltage 115 V AC).

Siemens IC 10 · 2011 4/37

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

Inline circuit fused version with 3NE1 SITOR all-range fuse (semiconductor and line protection)
For matching fuse bases see Catalog LV 10.1
F’1
• "Switch Disconnectors"
• "Fuse Systems" --> "SITOR Semiconductor Fuses"
Q21 or at www.siemens.com/sitor

Q11

M NSB0_01478c
3~

Soft starters ToC All-range fuses Line contactor up to Braking contactors1)2)

2 400 V
4

Rated Rated Voltage Size (optional) (for example circuit see the 3RW44
current current manual)
Q11 F’1 Q21 Q91 Q92
Type A Type A V Type Type Type
3)
Type of coordination "2" : Iq = 65 kA
3RW44 22 29 3NE1 020-2 80 690 +5 % 00 3RT10 34 3RT15 26 --
3RW44 23 36 3NE1 020-2 80 690 +5 % 00 3RT10 35 3RT15 26 --
3RW44 24 47 3NE1 021-2 100 690 +5 % 00 3RT10 36 3RT15 35 --
3RW44 25 57 3NE1 022-2 125 690 +5 % 00 3RT10 44 3RT15 35 --
3RW44 26 77 3NE1 022-2 125 690 +5 % 00 3RT10 45 3RT10 24 3RT10 35
3RW44 27 93 3NE1 224-2 160 690 +5 % 1 3RT10 46 3RT10 25 3RT10 36
3RW44 34 113 3NE1 225-2 200 690 +5 % 1 3RT10 54 3RT10 34 3RT10 44
3RW44 35 134 3NE1 227-2 250 690 +5 % 1 3RT10 55 3RT10 36 3RT10 45
3RW44 36 162 3NE1 227-2 250 690 +5 % 1 3RT10 56 3RT10 44 3RT10 45
3RW44 43 203 3NE1 230-2 315 600 +10 % 1 3RT10 64 3RT10 44 3RT10 54
3RW44 44 250 3NE1 331-2 350 460 +10 % 2 3RT10 65 3RT10 44 3RT10 55
3RW44 45 313 3NE1 333-2 450 690 +5 % 2 3RT10 75 3RT10 54 3RT10 56
3RW44 46 356 3NE1 334-2 500 690 +5 % 2 3RT10 75 3RT10 54 3RT10 56
3RW44 47 432 3NE1 435-2 560 690 +5 % 3 3RT10 76 3RT10 55 3RT10 64
3RW44 53 551 2 x 3NE1 334-2 500 690 +10 % 2 3TF68 3RT10 64 3RT10 66
3RW44 54 615 2 x 3NE1 334-2 500 690 +10 % 2 3TF68 3RT10 64 3RT10 75
3RW44 55 693 2 x 3NE1 334-2 500 690 +10 % 2 3TF69 3RT10 65 3RT10 75
3RW44 56 780 2 x 3NE1 435-2 560 690 +10 % 3 3TF69 3RT10 65 3RT10 75
3RW44 57 880 2 x 3NE1 435-2 560 690 +10 % 3 -- 3RT10 75 3RT10 76
3RW44 58 970 2 x 3NE1 435-2 560 690 +10 % 3 -- 3RT10 75 3RT10 76
3RW44 65 1 076 3 x 3NE1 334-2 500 690 +10 % 2 -- 3RT10 75 3TF68
3RW44 66 1 214 3 x 3NE1 435-2 560 690 +10 % 3 -- 3RT10 76 3TF68
1) If the ramp-down function "Combined braking" is selected, no braking con- 3) The type of coordination "2" refers to soft starters in combination with the
tactor is required. stipulated fuse, not to any additional components in the feeder.
If the ramp-down function "DC braking" is selected, a braking contactor
must be used in addition (see table for type).
For applications with large centrifugal masses (JLoad > JMotor) we recom-
mend the function "DC braking".
2) Additional auxiliary relay K4:
LZX:RT4A4T30
(3RW44 soft starter with rated control supply voltage 230 V AC),
LZX:RT4A4S15
(3RW44 soft starter with rated control supply voltage 115 V AC).

4/38 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

Inline circuit fused version with 3NE or 3NC SITOR semiconductor fuse
(semiconductor protection by fuse, line and overload protection by motor starter protector/circuit breaker)
For matching fuse bases see Catalog LV 10.1
• "Switch Disconnectors"
F3 F1
• "Fuse Systems" --> "SITOR Semiconductor Fuses"
Q21 or at www.siemens.com/sitor
Q1
F3
Q11
Q11
NSB0_01019b

NSB0_01479b
M
3~ M
3~

Soft starters ToC Semiconductor fuses, minimum Semiconductor fuses, maximum Semiconductor fuses (cylinder)

4
2
Rated 690 V +10 % Rated Size 690 V +10 % Rated Size Rated Size
Q11 current F3 current F3 current F3 current
Type A Type A Type A Type A
Type of coordination "2"3): Iq = 65 kA
3RW44 22 29 3NE4 120 80 0 3NE4 121 100 0 3NC2 280 80 22 x 58
3RW44 23 36 3NE4 121 100 0 3NE4 121 100 0 3NC2 200 100 22 x 58
3RW44 24 47 3NE4 121 100 0 3NE4 122 125 0 3NC2 200 100 22 x 58
3RW44 25 57 3NE4 122 125 0 3NE4 124 160 0 -- -- --
3RW44 26 77 3NE4 124 160 0 3NE4 124 160 0 -- -- --
3RW44 27 93 3NE3 224 160 1 3NE3 332-0B 400 2 -- -- --
3RW44 34 113 3NE3 225 200 1 3NE3 335 560 2 -- -- --
3RW44 35 134 3NE3 225 200 1 3NE3 335 560 2 -- -- --
3RW44 36 162 3NE3 227 250 1 3NE3 333 450 2 -- -- --
3RW44 43 203 3NE3 230-0B 315 1 3NE3 333 450 2 -- -- --
3RW44 44 250 3NE3 230-0B 315 1 3NE3 333 450 2 -- -- --
3RW44 45 313 3NE3 233 450 1 3NE3 336 630 2 -- -- --
3RW44 46 356 3NE3 333 450 2 3NE3 336 630 2 -- -- --
3RW44 47 432 3NE3 335 560 2 3NE3 338-8 800 2 -- -- --
3RW44 53 551 2 x 3NE3 335 560 2 3 x 3NE3 334-0B 500 2 -- -- --
3RW44 54 615 2 x 3NE3 335 560 2 3 x 3NE3 334-0B 500 2 -- -- --
3RW44 55 693 2 x 3NE3 335 560 2 3 x 3NE3 334-0B 500 2 -- -- --
3RW44 56 780 2 x 3NE3 336 630 2 2 x 3NE3 340-8 900 2 -- -- --
3RW44 57 880 2 x 3NE3 336 630 2 2 x 3NE3 340-8 900 2 -- -- --
3RW44 58 970 2 x 3NE3 336 630 2 2 x 3NE3 340-8 900 2 -- -- --
3RW44 65 1 076 2 x 3NE3 340-8 900 2 3 x 3NE3 338-8 800 2 -- -- --
3RW44 66 1 214 2 x 3NE3 340-8 900 2 3 x 3NE3 338-8 800 2 -- -- --

Soft starters ToC Line contactor Braking contactors1)2) Motor starter protectors/ Line fuses, maximum
2 up to 400 V circuit breakers
Rated (optional) (for example circuit see the 3RW44 manual) 440 V +10 % Rated 690 V +5 % Rated Size
current current current
Q11 Q21 Q91 Q92 Q1 F1
Type A Type Type Type Type A Type A
Type of coordination "2"3): Iq = 65 kA
3RW44 22 29 3RT10 34 3RT15 26 -- 3RV10 41-4HA10 50 3NA3 820-6 50 00
3RW44 23 36 3RT10 35 3RT15 26 -- 3RV10 41-4JA10 63 3NA3 822-6 63 00
3RW44 24 47 3RT10 36 3RT15 35 -- 3RV10 41-4KA10 75 3NA3 824-6 80 00
3RW44 25 57 3RT10 44 3RT15 35 -- 3RV10 41-4LA10 90 3NA3 830-6 100 00
3RW44 26 77 3RT10 45 3RT10 24 3RT10 35 3RV10 41-4MA10 100 3NA3 132-6 125 1
3RW44 27 93 3RT10 46 3RT10 25 3RT10 36 3RV10 41-4MA10 100 3NA3 136-6 160 1
3RW44 34 113 3RT10 54 3RT10 34 3RT10 44 3VL17 16 160 3NA3 244-6 250 2
3RW44 35 134 3RT10 55 3RT10 36 3RT10 45 3VL17 16 160 3NA3 244-6 250 2
3RW44 36 162 3RT10 56 3RT10 44 3RT10 45 3VL37 25 250 3NA3 365-6 500 3
3RW44 43 203 3RT10 64 3RT10 44 3RT10 54 3VL47 31 315 2 x 3NA3 354-6 2 x 355 3
3RW44 44 250 3RT10 65 3RT10 44 3RT10 55 3VL47 31 315 2 x 3NA3 354-6 2 x 355 3
3RW44 45 313 3RT10 75 3RT10 54 3RT10 56 3VL47 40 400 2 x 3NA3 365-6 2 x 500 3
3RW44 46 356 3RT10 75 3RT10 54 3RT10 56 3VL47 40 400 2 x 3NA3 365-6 2 x 500 3
3RW44 47 432 3RT10 76 3RT10 55 3RT10 64 3VL57 50 500 2 x 3NA3 365-6 2 x 500 3
3RW44 53 551 3TF68 3RT10 64 3RT10 66 3VL67 80 800 2 x 3NA3 365-6 2 x 500 3
3RW44 54 615 3TF68 3RT10 64 3RT10 75 3VL67 80 800 2 x 3NA3 365-6 2 x 500 3
3RW44 55 693 3TF69 3RT10 65 3RT10 75 3VL67 80 800 2 x 3NA3 365-6 2 x 500 3
3RW44 56 780 3TF69 3RT10 65 3RT10 75 3VL77 10 1 000 2 x 3NA3 365-6 2 x 500 3
3RW44 57 880 -- 3RT10 75 3RT10 76 3VL77 10 1 000 2 x 3NA3 365-6 2 x 500 3
3RW44 58 970 -- 3RT10 75 3RT10 76 3VL77 12 1 250 3 x 3NA3 365-6 3 x 500 3
3RW44 65 1 076 -- 3RT10 75 3TF68 3VL77 12 1 250 3 x 3NA3 365-6 3 x 500 3
3RW44 66 1 214 -- 3RT10 76 3TF68 3VL77 12 1 250 3 x 3NA3 365-6 3 x 500 3
1) If the ramp-down function "Combined braking" is selected, no braking con- 2) Additional auxiliary relay K4:
tactor is required. If the ramp-down function "DC braking" is selected, a LZX:RT4A4T30 (3RW44 soft starter with rated control supply voltage 230 V AC),
braking contactor must be used in addition (see table for type). LZX:RT4A4S15 (3RW44 soft starter with rated control supply voltage 115 V AC).
For applications with large centrifugal masses (JLoad > JMotor) we recom- 3)
The type of coordination "2" refers to soft starters in combination with the
mend the function "DC braking". stipulated protective device (motor starter protector/circuit breaker/fuse),
not to any additional components in the feeder.

Siemens IC 10 · 2011 4/39

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

Inside-delta circuit fused version with 3NE or 3NC SITOR fuses

(semiconductor protection by fuse, lead and overload protection by motor starter protector/circuit breaker)
For matching fuse bases see Catalog LV 10.1
• "Switch Disconnectors"
Q1 F1
• "Fuse Systems" --> "SITOR Semiconductor Fuses"
Q21 or at www.siemens.com/sitor
F3
F3
Q11

NSB0_01596b
Q11

NSB0_01597b
M
3~ M
3~

Soft starters ToC Semiconductor fuses, minimum Semiconductor fuses, maximum Semiconductor fuses (cylinder)
2
4

Rated 690 V +10 % Rated Size 690 V +10 % Rated Size Rated Size
current current current current
Q11 F3 F3 F3
Type A Type A Type A Type A
Type of coordination "2"1)
3RW44 22 50 3NE4 120 80 0 3NE4 121 100 0 3NC2 280 80 22 x 58
3RW44 23 62 3NE4 121 100 0 3NE4 121 100 0 3NC2 200 100 22 x 58
3RW44 24 81 3NE4 121 100 0 3NE4 122 125 0 3NC2 200 100 22 x 58
3RW44 25 99 3NE4 122 125 0 3NE4 124 160 0 -- -- --
3RW44 26 133 3NE4 124 160 0 3NE4 124 160 0 -- -- --
3RW44 27 161 3NE3 224 160 1 3NE3 332-0B 400 2 -- -- --
3RW44 34 196 3NE3 225 200 1 3NE3 335 560 2 -- -- --
3RW44 35 232 3NE3 225 200 1 3NE3 335 560 2 -- -- --
3RW44 36 281 3NE3 227 250 1 3NE3 333 450 2 -- -- --
3RW44 43 352 3NE3 230-0B 315 1 3NE3 333 450 2 -- -- --
3RW44 44 433 3NE3 230-0B 315 1 3NE3 333 450 2 -- -- --
3RW44 45 542 3NE3 233 450 1 3NE3 336 630 2 -- -- --
3RW44 46 617 3NE3 333 450 2 3NE3 336 630 2 -- -- --
3RW44 47 748 3NE3 335 560 2 3NE3 338-8 800 2 -- -- --
3RW44 53 954 2 x 3NE3 335 560 2 3 x 3NE3 334-0B 500 2 -- -- --
3RW44 54 1 065 2 x 3NE3 335 560 2 3 x 3NE3 334-0B 500 2 -- -- --
3RW44 55 1 200 2 x 3NE3 335 560 2 3 x 3NE3 334-0B 500 2 -- -- --
3RW44 56 1 351 2 x 3NE3 336 630 2 2 x 3NE3 340-8 900 2 -- -- --
3RW44 57 1 524 2 x 3NE3 336 630 2 3 x 3NE3 340-8 900 2 -- -- --
3RW44 58 1 680 2 x 3NE3 336 630 2 3 x 3NE3 340-8 900 2 -- -- --
3RW44 65 1 864 2 x 3NE3 340-8 900 2 3 x 3NE3 338-8 800 2 -- -- --
3RW44 66 2 103 2 x 3NE3 340-8 900 2 3 x 3NE3 338-8 800 2 -- -- --

Soft starters ToC Line contactor Motor starter protectors/ Line fuses, maximum
2 up to 400 V circuit breakers
Rated (optional) 440 V +10 % Rated 690 V +5 % Rated Size
current current current
Q11 Q21 Q1 F1
Type A Type Type A Type A
Type of coordination "2"1)
3RW44 22 50 3RT10 36-1AP04 3RV10 42-4KA10 75 3NA3 824-6 80 00
3RW44 23 62 3RT10 44-1AP04 3RV10 42-4LA10 90 3NA3 830-6 100 00
3RW44 24 81 3RT10 46-1AP04 3RV10 42-4MA10 100 3NA3 132-6 125 1
3RW44 25 99 3RT10 54-1AP36 3VL27 16 160 3NA3 136-6 160 1
3RW44 26 133 3RT10 55-6AP36 3VL27 16 160 3NA3 240-6 200 2
3RW44 27 161 3RT10 56-6AP36 3VL37 20 200 3NA3 244-6 250 2
3RW44 34 196 3RT10 64-6AP36 3VL37 25 250 3NA3 360-6 400 3
3RW44 35 232 3RT10 65-6AP36 3VL47 31 315 3NA3 360-6 400 3
3RW44 36 281 3RT10 66-6AP36 3VL47 40 400 2 x 3NA3 360-6 2 x 400 3
3RW44 43 352 3RT10 75-6AP36 3VL47 40 400 2 x 3NA3 365-6 2 x 500 3
3RW44 44 433 3RT10 76-6AP36 3VL57 50 500 2 x 3NA3 365-6 2 x 500 3
3RW44 45 542 3TF68 44-0CM7 3VL57 63 800 3 x 3NA3 365-6 3 x 500 3
3RW44 46 617 3TF68 44-0CM7 3VL67 80 800 3 x 3NA3 365-6 3 x 500 3
3RW44 47 748 3TF69 3VL67 80 800 3 x 3NA3 365-6 3 x 500 3
3RW44 53 954 -- 3VL77 10 1 000 3 x 3NA3 365-6 3 x 500 3
3RW44 54 1 065 -- 3VL77 12 1 250 3 x 3NA3 365-6 3 x 500 3
3RW44 55 1 200 -- 3VL87 16 1 600 3 x 3NA3 365-6 3 x 500 3
3RW44 56 1 351 -- 3VL87 16 1 600 3 x 3NA3 372 3 x 630 3
3RW44 57 1 524 -- 3VL87 16 1 600 3 x 3NA3 372 3 x 630 3
3RW44 58 1 680 -- 3WL12 20 2 000 2 x 3NA3 480 2 x 1000 4
3RW44 65 1 864 -- 3WL12 25 2 500 2 x 3NA3 482 2 x 1250 4
3RW44 66 2 103 -- 3WL12 25 2 500 2 x 3NA3 482 2 x 1250 4
1)
The type of coordination "2" refers to soft starters in combination with the
stipulated protective device (motor starter protector/circuit breaker/fuse),
not to any additional components in the feeder.

4/40 Siemens IC 10 · 2011

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

■ Selection and ordering data

SIRIUS 3RW44 for normal starting (CLASS 10) in inline circuit

4
3RW44 2. 3RW44 3. 3RW44 4. 3RW44 5. 3RW44 6.
3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Normal starting (CLASS 10) PU PS* PG
Rated values of Rated values of in inline circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inline circuit, rated operational voltage 200 ... 460 V1)
29 5.5 15 -- -- -- 26 7.5 7.5 15 -- } 3RW44 22-@BC@4 1 1 unit 131
36 7.5 18.5 -- -- -- 32 10 10 20 -- } 3RW44 23-@BC@4 1 1 unit 131
47 11 22 -- -- -- 42 10 15 25 -- } 3RW44 24-@BC@4 1 1 unit 131
57 15 30 -- -- -- 51 15 15 30 -- } 3RW44 25-@BC@4 1 1 unit 131
77 18.5 37 -- -- -- 68 20 20 50 -- } 3RW44 26-@BC@4 1 1 unit 131
93 22 45 -- -- -- 82 25 25 60 -- } 3RW44 27-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
113 30 55 -- -- -- 100 30 30 75 -- B 3RW44 34-@BC@4 1 1 unit 131
134 37 75 -- -- -- 117 30 40 75 -- B 3RW44 35-@BC@4 1 1 unit 131
162 45 90 -- -- -- 145 40 50 100 -- B 3RW44 36-@BC@4 1 1 unit 131
203 55 110 -- -- -- 180 50 60 125 -- B 3RW44 43-@BC@4 1 1 unit 131
250 75 132 -- -- -- 215 60 75 150 -- B 3RW44 44-@BC@4 1 1 unit 131
313 90 160 -- -- -- 280 75 100 200 -- B 3RW44 45-@BC@4 1 1 unit 131
356 110 200 -- -- -- 315 100 125 250 -- B 3RW44 46-@BC@4 1 1 unit 131
432 132 250 -- -- -- 385 125 150 300 -- B 3RW44 47-@BC@4 1 1 unit 131
551 160 315 -- -- -- 494 150 200 400 -- C 3RW44 53-@BC@4 1 1 unit 131
615 200 355 -- -- -- 551 150 200 450 -- C 3RW44 54-@BC@4 1 1 unit 131
693 200 400 -- -- -- 615 200 250 500 -- C 3RW44 55-@BC@4 1 1 unit 131
780 250 450 -- -- -- 693 200 250 600 -- C 3RW44 56-@BC@4 1 1 unit 131
880 250 500 -- -- -- 780 250 300 700 -- C 3RW44 57-@BC@4 1 1 unit 131
970 315 560 -- -- -- 850 300 350 750 -- C 3RW44 58-@BC@4 1 1 unit 131
1 076 355 630 -- -- -- 970 350 400 850 -- C 3RW44 65-@BC@4 1 1 unit 131
1 214 400 710 -- -- -- 1 076 350 450 950 -- C 3RW44 66-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us2)
• 115 V AC 3
• 230 V AC 4
1) 2)
3RW44 2. ... 3RW44 4. soft starters with screw terminals: Control by way of the internal 24 V DC supply and direct control by means
delivery time class } (preferred type). of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter In the event of more exacting requirements, it may be necessary
should always be designed on the basis of the required rated to choose a larger device. However, in some cases the de-
operational current of the motor. signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
The SIRIUS 3RW44 solid-state soft starters are designed for tailed technical information for a configuration which is tailored
easy starting conditions. The selection and ordering data were exactly to the application can be found in the manuals. Siemens
determined for the following boundary conditions (see also the recommends the use of the selection and simulation program
notes on page 4/6): Win-Soft Starter.
• Maximum starting time in s: 10
• Maximum starting current in % of motor current Ie: 300
• Maximum number of starts per hour in 1/h: 5

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/41
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Normal starting (CLASS 10) PU PS* PG
Rated values of Rated values of in inline circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inline circuit, rated operational voltage 400 ... 600 V1)
29 -- 15 18.5 -- -- 26 -- -- 15 20 A 3RW44 22-@BC@5 1 1 unit 131
36 -- 18.5 22 -- -- 32 -- -- 20 25 A 3RW44 23-@BC@5 1 1 unit 131
47 -- 22 30 -- -- 42 -- -- 25 30 A 3RW44 24-@BC@5 1 1 unit 131
57 -- 30 37 -- -- 51 -- -- 30 40 A 3RW44 25-@BC@5 1 1 unit 131
77 -- 37 45 -- -- 68 -- -- 50 50 A 3RW44 26-@BC@5 1 1 unit 131
4

93 -- 45 55 -- -- 82 -- -- 60 75 A 3RW44 27-@BC@5 1 1 unit 131

Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
113 -- 55 75 -- -- 100 -- -- 75 75 B 3RW44 34-@BC@5 1 1 unit 131
134 -- 75 90 -- -- 117 -- -- 75 100 B 3RW44 35-@BC@5 1 1 unit 131
162 -- 90 110 -- -- 145 -- -- 100 125 B 3RW44 36-@BC@5 1 1 unit 131
203 -- 110 132 -- -- 180 -- -- 125 150 B 3RW44 43-@BC@5 1 1 unit 131
250 -- 132 160 -- -- 215 -- -- 150 200 B 3RW44 44-@BC@5 1 1 unit 131
313 -- 160 200 -- -- 280 -- -- 200 250 B 3RW44 45-@BC@5 1 1 unit 131
356 -- 200 250 -- -- 315 -- -- 250 300 B 3RW44 46-@BC@5 1 1 unit 131
432 -- 250 315 -- -- 385 -- -- 300 400 B 3RW44 47-@BC@5 1 1 unit 131
551 -- 315 355 -- -- 494 -- -- 400 500 C 3RW44 53-@BC@5 1 1 unit 131
615 -- 355 400 -- -- 551 -- -- 450 600 C 3RW44 54-@BC@5 1 1 unit 131
693 -- 400 500 -- -- 615 -- -- 500 700 C 3RW44 55-@BC@5 1 1 unit 131
780 -- 450 560 -- -- 693 -- -- 600 750 C 3RW44 56-@BC@5 1 1 unit 131
880 -- 500 630 -- -- 780 -- -- 700 850 C 3RW44 57-@BC@5 1 1 unit 131
970 -- 560 710 -- -- 850 -- -- 750 900 C 3RW44 58-@BC@5 1 1 unit 131
1076 -- 630 800 -- -- 970 -- -- 850 1 100 C 3RW44 65-@BC@5 1 1 unit 131
1 214 -- 710 900 -- -- 1 076 -- -- 950 1 200 C 3RW44 66-@BC@5 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us2)
• 115 V AC 3
• 230 V AC 4
1) 2)
Soft starter with screw terminals: Control by way of the internal 24 V DC supply and direct control by means
3RW44 2. ... 3RW44 4. Delivery time class A, of PLC possible.
3RW44 5. ... 3RW44 6. Delivery time class B.
Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The SIRIUS 3RW44 solid-state soft starters are designed for
easy starting conditions. The selection and ordering data were
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 10
• Maximum starting current in % of motor current Ie: 300
• Maximum number of starts per hour in 1/h: 5
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

4/42 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Normal starting (CLASS 10) PU PS* PG
Rated values of Rated values of in inline circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inline circuit, rated operational voltage 400 ... 690 V
29 -- 15 18.5 30 -- 26 -- -- 15 20 B 3RW44 22-@BC@6 1 1 unit 131
36 -- 18.5 22 37 -- 32 -- -- 20 25 B 3RW44 23-@BC@6 1 1 unit 131
47 -- 22 30 45 -- 42 -- -- 25 30 B 3RW44 24-@BC@6 1 1 unit 131
57 -- 30 37 55 -- 51 -- -- 30 40 B 3RW44 25-@BC@6 1 1 unit 131
77 -- 37 45 75 -- 68 -- -- 50 50 B 3RW44 26-@BC@6 1 1 unit 131

4
93 -- 45 55 90 -- 82 -- -- 60 75 B 3RW44 27-@BC@6 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
113 -- 55 75 110 -- 100 -- -- 75 75 B 3RW44 34-@BC@6 1 1 unit 131
134 -- 75 90 132 -- 117 -- -- 75 100 B 3RW44 35-@BC@6 1 1 unit 131
162 -- 90 110 160 -- 145 -- -- 100 125 B 3RW44 36-@BC@6 1 1 unit 131
203 -- 110 132 200 -- 180 -- -- 125 150 B 3RW44 43-@BC@6 1 1 unit 131
250 -- 132 160 250 -- 215 -- -- 150 200 B 3RW44 44-@BC@6 1 1 unit 131
313 -- 160 200 315 -- 280 -- -- 200 250 B 3RW44 45-@BC@6 1 1 unit 131
356 -- 200 250 355 -- 315 -- -- 250 300 B 3RW44 46-@BC@6 1 1 unit 131
432 -- 250 315 400 -- 385 -- -- 300 400 B 3RW44 47-@BC@6 1 1 unit 131
551 -- 315 355 560 -- 494 -- -- 400 500 C 3RW44 53-@BC@6 1 1 unit 131
615 -- 355 400 630 -- 551 -- -- 450 600 C 3RW44 54-@BC@6 1 1 unit 131
693 -- 400 500 710 -- 615 -- -- 500 700 C 3RW44 55-@BC@6 1 1 unit 131
780 -- 450 560 800 -- 693 -- -- 600 750 C 3RW44 56-@BC@6 1 1 unit 131
880 -- 500 630 900 -- 780 -- -- 700 850 C 3RW44 57-@BC@6 1 1 unit 131
970 -- 560 710 1 000 -- 850 -- -- 750 900 C 3RW44 58-@BC@6 1 1 unit 131
1 076 -- 630 800 1 100 -- 970 -- -- 850 1 100 C 3RW44 65-@BC@6 1 1 unit 131
1 214 -- 710 900 1 200 -- 1 076 -- -- 950 1 200 C 3RW44 66-@BC@6 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us1)
• 115 V AC 3
• 230 V AC 4
1)
Control by way of the internal 24 V DC supply and direct control by means
of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The SIRIUS 3RW44 solid-state soft starters are designed for
easy starting conditions. The selection and ordering data were
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 10
• Maximum starting current in % of motor current Ie: 300
• Maximum number of starts per hour in 1/h: 5
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/43
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44
SIRIUS 3RW44 for heavy starting (CLASS 20) in inline circuit

3RW44 2. 3RW44 3. 3RW44 4. 3RW44 5. 3RW44 6.

4

3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Heavy starting (CLASS 20) PU PS* PG
Rated values of Rated values of in inline circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inline circuit, rated operational voltage 200 ... 460 V1)
29 5.5 15 -- -- -- 26 7.5 7.5 15 -- } 3RW44 22-@BC@4 1 1 unit 131
36 7.5 18.5 -- -- -- 32 10 10 20 -- } 3RW44 23-@BC@4 1 1 unit 131
47 11 22 -- -- -- 42 10 15 25 -- } 3RW44 24-@BC@4 1 1 unit 131
57 15 30 -- -- -- 51 15 15 30 -- } 3RW44 25-@BC@4 1 1 unit 131
77 18.5 37 -- -- -- 68 20 20 50 -- } 3RW44 27-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
93 22 45 -- -- 82 25 25 60 -- B 3RW44 34-@BC@4 1 1 unit 131
113 30 55 -- -- -- 100 30 30 75 -- B 3RW44 35-@BC@4 1 1 unit 131
134 37 75 -- -- -- 117 30 40 75 -- B 3RW44 36-@BC@4 1 1 unit 131
162 45 90 -- -- -- 145 40 50 100 -- B 3RW44 43-@BC@4 1 1 unit 131
203 55 110 -- -- -- 180 50 60 125 -- B 3RW44 45-@BC@4 1 1 unit 131
250 75 132 -- -- -- 215 60 75 150 -- B 3RW44 46-@BC@4 1 1 unit 131
313 90 160 -- -- -- 280 75 100 200 -- B 3RW44 47-@BC@4 1 1 unit 131
356 110 200 -- -- -- 315 100 125 250 -- B 3RW44 47-@BC@4 1 1 unit 131
432 132 250 -- -- -- 385 125 150 300 -- C 3RW44 53-@BC@4 1 1 unit 131
551 160 315 -- -- -- 494 150 200 400 -- C 3RW44 53-@BC@4 1 1 unit 131
615 200 355 -- -- -- 551 150 200 450 -- C 3RW44 55-@BC@4 1 1 unit 131
693 200 400 -- -- -- 615 200 250 500 -- C 3RW44 57-@BC@4 1 1 unit 131
780 250 450 -- -- -- 693 200 250 600 -- C 3RW44 65-@BC@4 1 1 unit 131
880 250 500 -- -- -- 780 250 300 700 -- C 3RW44 65-@BC@4 1 1 unit 131
970 315 560 -- -- -- 850 300 350 750 -- C 3RW44 65-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us2)
• 115 V AC 3
• 230 V AC 4
1) 2)
3RW44 2.to 3RW44 4. soft starters with screw terminals: Control by way of the internal 24 V DC supply and direct control by means
delivery time class } (preferred type). of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter signed-in safety reserves also permit the listed units to be used
should always be designed on the basis of the required rated in boundary conditions which are slightly more demanding. De-
operational current of the motor. tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
The SIRIUS 3RW44 solid-state soft starters are designed for recommends the use of the selection and simulation program
easy starting conditions. The selection and ordering data were Win-Soft Starter.
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 40
• Maximum starting current in % of motor current Ie: 350
• Maximum number of starts per hour in 1/h: 1
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
* You can order this quantity or a multiple thereof.
4/44 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Heavy starting (CLASS 20) PU PS* PG
Rated values of Rated values of in inline circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inline circuit, rated operational voltage 400 ... 600 V1)
29 -- 15 18.5 -- -- 26 -- -- 15 20 A 3RW44 22-@BC@5 1 1 unit 131
36 -- 18.5 22 -- -- 32 -- -- 20 25 A 3RW44 23-@BC@5 1 1 unit 131
47 -- 22 30 -- -- 42 -- -- 25 30 A 3RW44 24-@BC@5 1 1 unit 131
57 -- 30 37 -- -- 51 -- -- 30 40 A 3RW44 25-@BC@5 1 1 unit 131

4
77 -- 37 45 -- -- 68 -- -- 50 50 A 3RW44 27-@BC@5 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
93 -- 45 55 -- -- 82 -- -- 60 75 B 3RW44 34-@BC@5 1 1 unit 131
113 -- 55 75 -- -- 100 -- -- 75 75 B 3RW44 35-@BC@5 1 1 unit 131
134 -- 75 90 -- -- 117 -- -- 75 100 B 3RW44 36-@BC@5 1 1 unit 131
162 -- 90 110 -- -- 145 -- -- 100 125 B 3RW44 43-@BC@5 1 1 unit 131
203 -- 110 132 -- -- 180 -- -- 125 150 B 3RW44 45-@BC@5 1 1 unit 131
250 -- 132 160 -- -- 215 -- -- 150 200 B 3RW44 46-@BC@5 1 1 unit 131
313 -- 160 200 -- -- 280 -- -- 200 250 B 3RW44 47-@BC@5 1 1 unit 131
356 -- 200 250 -- -- 315 -- -- 250 300 B 3RW44 47-@BC@5 1 1 unit 131
432 -- 250 315 -- -- 385 -- -- 300 400 C 3RW44 53-@BC@5 1 1 unit 131
551 -- 315 355 -- -- 494 -- -- 400 500 C 3RW44 53-@BC@5 1 1 unit 131
615 -- 355 400 -- -- 551 -- -- 450 600 C 3RW44 54-@BC@5 1 1 unit 131
693 -- 400 500 -- -- 615 -- -- 500 700 C 3RW44 57-@BC@5 1 1 unit 131
780 -- 450 560 -- -- 693 -- -- 600 750 C 3RW44 65-@BC@5 1 1 unit 131
880 -- 500 630 -- -- 780 -- -- 700 850 C 3RW44 65-@BC@5 1 1 unit 131
970 -- 560 710 -- -- 850 -- -- 750 900 C 3RW44 65-@BC@5 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us2)
• 115 V AC 3
• 230 V AC 4
1) 2)
Soft starter with screw terminals: Control by way of the internal 24 V DC supply and direct control by means
3RW44 2. to 3RW44 4. Delivery time class A, of PLC possible.
3RW44 5. to 3RW44 6. Delivery time class B.
Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The SIRIUS 3RW44 solid-state soft starters are designed for
easy starting conditions. The selection and ordering data were
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 40
• Maximum starting current in % of motor current Ie: 350
• Maximum number of starts per hour in 1/h: 1
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/45
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Heavy starting (CLASS 20) PU PS* PG
Rated values of Rated values of in inline circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inline circuit, rated operational voltage 400 ... 690 V
29 -- 15 18.5 30 -- 26 -- -- 15 20 B 3RW44 22-@BC@6 1 1 unit 131
36 -- 18.5 22 37 -- 32 -- -- 20 25 B 3RW44 23-@BC@6 1 1 unit 131
47 -- 22 30 45 -- 42 -- -- 25 30 B 3RW44 24-@BC@6 1 1 unit 131
57 -- 30 37 55 -- 51 -- -- 30 40 B 3RW44 25-@BC@6 1 1 unit 131
4

77 -- 37 45 75 -- 68 -- -- 50 50 B 3RW44 27-@BC@6 1 1 unit 131

Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
93 -- 45 55 90 -- 82 -- -- 60 75 B 3RW44 34-@BC@6 1 1 unit 131
113 -- 55 75 110 -- 100 -- -- 75 75 B 3RW44 35-@BC@6 1 1 unit 131
134 -- 75 90 132 -- 117 -- -- 75 100 B 3RW44 36-@BC@6 1 1 unit 131
162 -- 90 110 160 -- 145 -- -- 100 125 B 3RW44 43-@BC@6 1 1 unit 131
203 -- 110 132 200 -- 180 -- -- 125 150 B 3RW44 45-@BC@6 1 1 unit 131
250 -- 132 160 250 -- 215 -- -- 150 200 B 3RW44 46-@BC@6 1 1 unit 131
313 -- 160 200 315 -- 280 -- -- 200 250 B 3RW44 47-@BC@6 1 1 unit 131
356 -- 200 250 355 -- 315 -- -- 250 300 B 3RW44 47-@BC@6 1 1 unit 131
432 -- 250 315 400 -- 385 -- -- 300 400 C 3RW44 53-@BC@6 1 1 unit 131
551 -- 315 355 560 -- 494 -- -- 400 500 C 3RW44 53-@BC@6 1 1 unit 131
615 -- 355 400 630 -- 551 -- -- 450 600 C 3RW44 55-@BC@6 1 1 unit 131
693 -- 400 500 710 -- 615 -- -- 500 700 C 3RW44 57-@BC@6 1 1 unit 131
780 -- 450 560 800 -- 693 -- -- 600 750 C 3RW44 65-@BC@6 1 1 unit 131
880 -- 500 630 900 -- 780 -- -- 700 850 C 3RW44 65-@BC@6 1 1 unit 131
970 -- 560 710 1 000 -- 850 -- -- 750 900 C 3RW44 65-@BC@6 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us1)
• 115 V AC 3
• 230 V AC 4
1)
Control by way of the internal 24 V DC supply and direct control by means
of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The SIRIUS 3RW44 solid-state soft starters are designed for
easy starting conditions. The selection and ordering data were
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 40
• Maximum starting current in % of motor current Ie: 350
• Maximum number of starts per hour in 1/h: 1
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

4/46 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44
SIRIUS 3RW44 for very heavy starting (CLASS 30) in inline circuit

3RW44 2. 3RW44 3. 3RW44 4. 3RW44 5. 3RW44 6.

4
3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Very heavy starting (CLASS 30) PU PS* PG
Rated values of Rated values of in inline circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inline circuit, rated operational voltage 200 ... 460 V1)
29 5.5 15 -- -- -- 26 7.5 7.5 15 -- } 3RW44 22-@BC@4 1 1 unit 131
36 7.5 18.5 -- -- -- 32 10 10 20 -- } 3RW44 24-@BC@4 1 1 unit 131
47 11 22 -- -- -- 42 10 15 25 -- } 3RW44 25-@BC@4 1 1 unit 131
57 15 30 -- -- -- 51 15 15 30 -- } 3RW44 25-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
77 18.5 37 -- -- -- 68 20 20 50 -- B 3RW44 34-@BC@4 1 1 unit 131
93 22 45 -- -- -- 82 25 25 60 -- B 3RW44 35-@BC@4 1 1 unit 131
113 30 55 -- -- -- 100 30 30 75 -- B 3RW44 43-@BC@4 1 1 unit 131
134 37 75 -- -- -- 117 30 40 75 -- B 3RW44 43-@BC@4 1 1 unit 131
162 45 90 -- -- -- 145 40 50 100 -- B 3RW44 43-@BC@4 1 1 unit 131
203 55 110 -- -- -- 180 50 60 125 -- B 3RW44 46-@BC@4 1 1 unit 131
250 75 132 -- -- -- 215 60 75 150 -- B 3RW44 47-@BC@4 1 1 unit 131
313 90 160 -- -- -- 280 75 100 200 -- C 3RW44 53-@BC@4 1 1 unit 131
356 110 200 -- -- -- 315 100 125 250 -- C 3RW44 53-@BC@4 1 1 unit 131
432 132 250 -- -- -- 385 125 150 300 -- C 3RW44 53-@BC@4 1 1 unit 131
551 160 315 -- -- -- 494 150 200 400 -- C 3RW44 55-@BC@4 1 1 unit 131
615 200 355 -- -- -- 551 150 200 450 -- C 3RW44 58-@BC@4 1 1 unit 131
693 200 400 -- -- -- 615 200 250 500 -- C 3RW44 65-@BC@4 1 1 unit 131
780 250 450 -- -- -- 693 200 250 600 -- C 3RW44 65-@BC@4 1 1 unit 131
880 250 500 -- -- -- 780 250 300 700 -- C 3RW44 65-@BC@4 1 1 unit 131
970 315 560 -- -- -- 850 300 350 750 -- C 3RW44 66-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us2)
• 115 V AC 3
• 230 V AC 4
1) 2)
3RW44 2.to 3RW44 4. soft starters with screw terminals: Control by way of the internal 24 V DC supply and direct control by means
delivery time class } (preferred type). of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter signed-in safety reserves also permit the listed units to be used
should always be designed on the basis of the required rated in boundary conditions which are slightly more demanding. De-
operational current of the motor. tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
The SIRIUS 3RW44 solid-state soft starters are designed for recommends the use of the selection and simulation program
easy starting conditions. The selection and ordering data were Win-Soft Starter.
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 60
• Maximum starting current in % of motor current Ie: 350
• Maximum number of starts per hour in 1/h: 1
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
* You can order this quantity or a multiple thereof.
Illustrations are approximate Siemens IC 10 · 2011 4/47
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Very heavy starting (CLASS 30) PU PS* PG
Rated values of Rated values of in inline circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inline circuit, rated operational voltage 400 ... 600 V1)
29 -- 15 18.5 -- -- 26 -- -- 15 20 A 3RW44 22-@BC@5 1 1 unit 131
36 -- 18.5 22 -- -- 32 -- -- 20 25 A 3RW44 24-@BC@5 1 1 unit 131
47 -- 22 30 -- -- 42 -- -- 25 30 A 3RW44 25-@BC@5 1 1 unit 131
57 -- 30 37 -- -- 51 -- -- 30 40 A 3RW44 25-@BC@5 1 1 unit 131
4

Order No. supplement for connection types

• With screw terminals 1
• With spring-type terminals 3
77 -- 37 45 -- -- 68 -- -- 50 50 B 3RW44 34-@BC@5 1 1 unit 131
93 -- 45 55 -- -- 82 -- -- 60 75 B 3RW44 35-@BC@5 1 1 unit 131
113 -- 55 75 -- -- 100 -- -- 75 75 B 3RW44 43-@BC@5 1 1 unit 131
134 -- 75 90 -- -- 117 -- -- 75 100 B 3RW44 43-@BC@5 1 1 unit 131
162 -- 90 110 -- -- 145 -- -- 100 125 B 3RW44 43-@BC@5 1 1 unit 131
203 -- 110 132 -- -- 180 -- -- 125 150 B 3RW44 46-@BC@5 1 1 unit 131
250 -- 132 160 -- -- 215 -- -- 150 200 B 3RW44 47-@BC@5 1 1 unit 131
313 -- 160 200 -- -- 280 -- -- 200 250 C 3RW44 53-@BC@5 1 1 unit 131
356 -- 200 250 -- -- 315 -- -- 250 300 C 3RW44 53-@BC@5 1 1 unit 131
432 -- 250 315 -- -- 385 -- -- 300 400 C 3RW44 53-@BC@5 1 1 unit 131
551 -- 315 355 -- -- 494 -- -- 400 500 C 3RW44 55-@BC@5 1 1 unit 131
615 -- 355 400 -- -- 551 -- -- 450 600 C 3RW44 58-@BC@5 1 1 unit 131
693 -- 400 500 -- -- 615 -- -- 500 700 C 3RW44 65-@BC@5 1 1 unit 131
780 -- 450 560 -- -- 693 -- -- 600 750 C 3RW44 65-@BC@5 1 1 unit 131
880 -- 500 630 -- -- 780 -- -- 700 850 C 3RW44 65-@BC@5 1 1 unit 131
-- -- -- -- -- -- 850 -- -- 750 900 C 3RW44 66-@BC@5 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us2)
• 115 V AC 3
• 230 V AC 4
1) 2)
Soft starter with screw terminals: Control by way of the internal 24 V DC supply and direct control by means
3RW44 2. to 3RW44 4. Delivery time class A, of PLC possible.
3RW44 5. to 3RW44 6. Delivery time class B.
Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The SIRIUS 3RW44 solid-state soft starters are designed for
easy starting conditions. The selection and ordering data were
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 60
• Maximum starting current in % of motor current Ie: 350
• Maximum number of starts per hour in 1/h: 1
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

4/48 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Very heavy starting (CLASS 30) PU PS* PG
Rated values of Rated values of in inline circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inline circuit, rated operational voltage 400 ... 690 V
29 -- 15 18.5 30 -- 26 -- -- 15 20 B 3RW44 22-@BC@6 1 1 unit 131
36 -- 18.5 22 37 -- 32 -- -- 20 25 B 3RW44 24-@BC@6 1 1 unit 131
47 -- 22 30 45 -- 42 -- -- 25 30 B 3RW44 25-@BC@6 1 1 unit 131
57 -- 30 37 55 -- 51 -- -- 30 40 B 3RW44 25-@BC@6 1 1 unit 131

4
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
77 -- 37 45 75 -- 68 -- -- 50 50 B 3RW44 34-@BC@6 1 1 unit 131
93 -- 45 55 90 -- 82 -- -- 60 75 B 3RW44 35-@BC@6 1 1 unit 131
113 -- 55 75 110 -- 100 -- -- 75 75 B 3RW44 43-@BC@6 1 1 unit 131
134 -- 75 90 132 -- 117 -- -- 75 100 B 3RW44 43-@BC@6 1 1 unit 131
162 -- 90 110 160 -- 145 -- -- 100 125 B 3RW44 43-@BC@6 1 1 unit 131
203 -- 110 132 200 -- 180 -- -- 125 150 B 3RW44 46-@BC@6 1 1 unit 131
250 -- 132 160 250 -- 215 -- -- 150 200 B 3RW44 47-@BC@6 1 1 unit 131
313 -- 160 200 315 -- 280 -- -- 200 250 C 3RW44 53-@BC@6 1 1 unit 131
356 -- 200 250 355 -- 315 -- -- 250 300 C 3RW44 53-@BC@6 1 1 unit 131
432 -- 250 315 400 -- 385 -- -- 300 400 C 3RW44 53-@BC@6 1 1 unit 131
551 -- 315 355 560 -- 494 -- -- 400 500 C 3RW44 55-@BC@6 1 1 unit 131
615 -- 355 400 630 -- 551 -- -- 450 600 C 3RW44 58-@BC@6 1 1 unit 131
693 -- 400 500 710 -- 615 -- -- 500 700 C 3RW44 65-@BC@6 1 1 unit 131
780 -- 450 560 800 -- 693 -- -- 600 750 C 3RW44 65-@BC@6 1 1 unit 131
880 -- 500 630 900 -- 780 -- -- 700 850 C 3RW44 65-@BC@6 1 1 unit 131
-- -- -- -- -- -- 850 -- -- 750 900 C 3RW44 66-@BC@6 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us1)
• 115 V AC 3
• 230 V AC 4
1)
Control by way of the internal 24 V DC supply and direct control by means
of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The SIRIUS 3RW44 solid-state soft starters are designed for
easy starting conditions. The selection and ordering data were
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 60
• Maximum starting current in % of motor current Ie: 350
• Maximum number of starts per hour in 1/h: 1
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/49
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44
SIRIUS 3RW44 for normal starting (CLASS 10) in inside-delta circuit

3RW44 2. 3RW44 3. 3RW44 4. 3RW44 5. 3RW44 6.

4

1) 1)
3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Normal starting (CLASS 10) PU PS* PG
Rated values of Rated values of in inside-delta circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inside-delta circuit, rated operational voltage 200 ... 460 V2)
50 15 22 -- -- -- 45 10 15 30 -- } 3RW44 22-@BC@4 1 1 unit 131
62 18.5 30 -- -- -- 55 15 20 40 -- } 3RW44 23-@BC@4 1 1 unit 131
81 22 45 -- -- -- 73 20 25 50 -- } 3RW44 24-@BC@4 1 1 unit 131
99 30 55 -- -- -- 88 25 30 60 -- } 3RW44 25-@BC@4 1 1 unit 131
133 37 75 -- -- -- 118 30 40 75 -- } 3RW44 26-@BC@4 1 1 unit 131
161 45 90 -- -- -- 142 40 50 100 -- } 3RW44 27-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
196 55 110 -- -- -- 173 50 60 125 -- B 3RW44 34-@BC@4 1 1 unit 131
232 75 132 -- -- -- 203 60 75 150 -- B 3RW44 35-@BC@4 1 1 unit 131
281 90 160 -- -- -- 251 75 100 200 -- B 3RW44 36-@BC@4 1 1 unit 131
352 110 200 -- -- -- 312 100 125 250 -- B 3RW44 43-@BC@4 1 1 unit 131
433 132 250 -- -- -- 372 125 150 300 -- B 3RW44 44-@BC@4 1 1 unit 131
542 160 315 -- -- -- 485 150 200 400 -- B 3RW44 45-@BC@4 1 1 unit 131
617 200 355 -- -- -- 546 150 200 450 -- B 3RW44 46-@BC@4 1 1 unit 131
748 250 400 -- -- -- 667 200 250 600 -- B 3RW44 47-@BC@4 1 1 unit 131
954 315 560 -- -- -- 856 300 350 750 -- C 3RW44 53-@BC@4 1 1 unit 131
1 065 355 630 -- -- -- 954 350 400 850 -- C 3RW44 54-@BC@4 1 1 unit 131
1 200 400 710 -- -- -- 1 065 350 450 950 -- C 3RW44 55-@BC@4 1 1 unit 131
1 351 450 800 -- -- -- 1 200 450 500 1 050 -- C 3RW44 56-@BC@4 1 1 unit 131
1 524 500 900 -- -- -- 1 351 450 600 1 200 -- C 3RW44 57-@BC@4 1 1 unit 131
1 680 560 1 000 -- -- -- 1 472 550 650 1 300 -- C 3RW44 58-@BC@4 1 1 unit 131
1 864 630 1 100 -- -- -- 1 680 650 750 1 500 -- C 3RW44 65-@BC@4 1 1 unit 131
2 103 710 1 200 -- -- -- 1 864 700 850 1 700 -- C 3RW44 66-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us3)
• 115 V AC 3
• 230 V AC 4
1) 2)
In the selection table, the unit rated current Ie refers to the induction 3RW44 2.to 3RW44 4. soft starters with screw terminals:
motor's rated operational current in the inside-delta circuit. delivery time class } (preferred type).
The actual current of the device is approx. 58 % of this value. 3) Control by way of the internal 24 V DC supply and direct control by means
of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter In the event of more exacting requirements, it may be necessary
should always be designed on the basis of the required rated to choose a larger device. However, in some cases the de-
operational current of the motor. signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
The SIRIUS 3RW44 solid-state soft starters are designed for tailed technical information for a configuration which is tailored
easy starting conditions. The selection and ordering data were exactly to the application can be found in the manuals. Siemens
determined for the following boundary conditions (see also the recommends the use of the selection and simulation program
notes on page 4/6): Win-Soft Starter.
• Maximum starting time in s: 10
• Maximum starting current in % of motor current Ie: 300
• Maximum number of starts per hour in 1/h: 5

* You can order this quantity or a multiple thereof.

4/50 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

3RW ambient temperature 40 °C1) 3RW ambient temperature 50 °C1) DT Normal starting (CLASS 10) PU PS* PG
Rated values of Rated values of in inside-delta circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inside-delta circuit, rated operational voltage 400 ... 600 V2)
50 -- 22 30 -- -- 45 -- -- 30 40 A 3RW44 22-@BC@5 1 1 unit 131
62 -- 30 37 -- -- 55 -- -- 40 50 A 3RW44 23-@BC@5 1 1 unit 131
81 -- 45 45 -- -- 73 -- -- 50 60 A 3RW44 24-@BC@5 1 1 unit 131
99 -- 55 55 -- -- 88 -- -- 60 75 A 3RW44 25-@BC@5 1 1 unit 131
133 -- 75 90 -- -- 118 -- -- 75 100 A 3RW44 26-@BC@5 1 1 unit 131

4
161 -- 90 110 -- -- 142 -- -- 100 125 A 3RW44 27-@BC@5 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
196 -- 110 132 -- -- 173 -- -- 125 150 B 3RW44 34-@BC@5 1 1 unit 131
232 -- 132 160 -- -- 203 -- -- 150 200 B 3RW44 35-@BC@5 1 1 unit 131
281 -- 160 200 -- -- 251 -- -- 200 250 B 3RW44 36-@BC@5 1 1 unit 131
352 -- 200 250 -- -- 312 -- -- 250 300 B 3RW44 43-@BC@5 1 1 unit 131
433 -- 250 315 -- -- 372 -- -- 300 350 B 3RW44 44-@BC@5 1 1 unit 131
542 -- 315 355 -- -- 485 -- -- 400 500 B 3RW44 45-@BC@5 1 1 unit 131
617 -- 355 450 -- -- 546 -- -- 450 600 B 3RW44 46-@BC@5 1 1 unit 131
748 -- 400 500 -- -- 667 -- -- 600 750 B 3RW44 47-@BC@5 1 1 unit 131
954 -- 560 630 -- -- 856 -- -- 750 950 C 3RW44 53-@BC@5 1 1 unit 131
1 065 -- 630 710 -- -- 954 -- -- 850 1 050 C 3RW44 54-@BC@5 1 1 unit 131
1 200 -- 710 800 -- -- 1 065 -- -- 950 1 200 C 3RW44 55-@BC@5 1 1 unit 131
1 351 -- 800 900 -- -- 1 200 -- -- 1 050 1 350 C 3RW44 56-@BC@5 1 1 unit 131
1 524 -- 900 1 000 -- -- 1 351 -- -- 1 200 1 500 C 3RW44 57-@BC@5 1 1 unit 131
1 680 -- 1 000 1 200 -- -- 1 472 -- -- 1 300 1 650 C 3RW44 58-@BC@5 1 1 unit 131
1 864 -- 1 100 1 350 -- -- 1 680 -- -- 1 500 1 900 C 3RW44 65-@BC@5 1 1 unit 131
2 103 -- 1 200 1 500 -- -- 1 864 -- -- 1 700 2 100 C 3RW44 66-@BC@5 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us3)
• 115 V AC 3
• 230 V AC 4
1) 2)
In the selection table, the unit rated current Ie refers to the induction Soft starter with screw terminals:
motor's rated operational current in the inside-delta circuit. 3RW44 2. to 3RW44 4. Delivery time class A,
The actual current of the device is approx. 58 % of this value. 3RW44 5. to 3RW44 6. Delivery time class B.
3) Control by way of the internal 24 V DC supply and direct control by means
of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The SIRIUS 3RW44 solid-state soft starters are designed for
easy starting conditions. The selection and ordering data were
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 10
• Maximum starting current in % of motor current Ie: 300
• Maximum number of starts per hour in 1/h: 5
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/51
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44
SIRIUS 3RW44 for heavy starting (CLASS 20) in inside-delta circuit

3RW44 2. 3RW44 3. 3RW44 4. 3RW44 5. 3RW44 6.

4

1) 1)
3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Heavy starting (CLASS 20) PU PS* PG
Rated values of Rated values of in inside-delta circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inside-delta circuit, rated operational voltage 200 ... 460 V2)
50 15 22 -- -- -- 45 10 15 30 -- } 3RW44 23-@BC@4 1 1 unit 131
62 18.5 30 -- -- -- 55 15 20 40 -- } 3RW44 24-@BC@4 1 1 unit 131
81 22 45 -- -- -- 73 20 25 50 -- } 3RW44 25-@BC@4 1 1 unit 131
99 30 55 -- -- -- 88 25 30 60 -- } 3RW44 25-@BC@4 1 1 unit 131
133 37 75 -- -- -- 118 30 40 75 -- } 3RW44 27-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
161 45 90 -- -- -- 142 40 50 100 -- B 3RW44 34-@BC@4 1 1 unit 131
196 55 110 -- -- -- 173 50 60 125 -- B 3RW44 35-@BC@4 1 1 unit 131
232 75 132 -- -- -- 203 60 75 150 -- B 3RW44 36-@BC@4 1 1 unit 131
281 90 160 -- -- -- 251 75 100 200 -- B 3RW44 43-@BC@4 1 1 unit 131
352 110 200 -- -- -- 312 100 125 250 -- B 3RW44 44-@BC@4 1 1 unit 131
433 132 250 -- -- -- 372 125 150 300 -- B 3RW44 45-@BC@4 1 1 unit 131
542 160 315 -- -- -- 485 150 200 400 -- B 3RW44 47-@BC@4 1 1 unit 131
617 200 355 -- -- -- 546 150 200 450 -- B 3RW44 47-@BC@4 1 1 unit 131
748 250 400 -- -- -- 667 200 250 600 -- C 3RW44 53-@BC@4 1 1 unit 131
954 315 560 -- -- -- 856 300 350 750 -- C 3RW44 53-@BC@4 1 1 unit 131
1 065 355 630 -- -- -- 954 350 400 850 -- C 3RW44 55-@BC@4 1 1 unit 131
1 200 400 710 -- -- -- 1 065 350 450 950 -- C 3RW44 57-@BC@4 1 1 unit 131
1 351 450 800 -- -- -- 1 200 450 500 1 050 -- C 3RW44 65-@BC@4 1 1 unit 131
1 524 500 900 -- -- -- 1 351 450 600 1 200 -- C 3RW44 65-@BC@4 1 1 unit 131
1 680 560 1 000 -- -- -- 1 472 550 650 1 300 -- C 3RW44 65-@BC@4 1 1 unit 131
-- -- -- -- -- -- 1 680 650 750 1 500 -- C 3RW44 66-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
3)
Order No. supplement for the rated control supply voltage Us
• 115 V AC 3
• 230 V AC 4
1) In the selection table, the unit rated current Ie refers to the induction 2) 3RW44 2.to 3RW44 4. soft starters with screw terminals:
motor's rated operational current in the inside-delta circuit. delivery time class } (preferred type).
The actual current of the device is approx. 58 % of this value. 3)
Control by way of the internal 24 V DC supply and direct control by means
of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter • Maximum number of starts per hour in 1/h: 1
should always be designed on the basis of the required rated
operational current of the motor. In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
The SIRIUS 3RW44 solid-state soft starters are designed for signed-in safety reserves also permit the listed units to be used
easy starting conditions. The selection and ordering data were in boundary conditions which are slightly more demanding. De-
determined for the following boundary conditions (see also the tailed technical information for a configuration which is tailored
notes on page 4/6): exactly to the application can be found in the manuals. Siemens
• Maximum starting time in s: 40 recommends the use of the selection and simulation program
• Maximum starting current in % of motor current Ie: 350 Win-Soft Starter.

* You can order this quantity or a multiple thereof.

4/52 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

3RW ambient temperature 40 °C1) 3RW ambient temperature 50 °C1) DT Heavy starting (CLASS 20) PU PS* PG
Rated values of Rated values of in inside-delta circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inside-delta circuit, rated operational voltage 400 ... 600 V2)
50 -- 22 30 -- -- 45 -- -- 30 40 A 3RW44 23-@BC@5 1 1 unit 131
62 -- 30 37 -- -- 55 -- -- 40 50 A 3RW44 24-@BC@5 1 1 unit 131
81 -- 45 45 -- -- 73 -- -- 50 60 A 3RW44 25-@BC@5 1 1 unit 131
99 -- 55 55 -- -- 88 -- -- 60 75 A 3RW44 25-@BC@5 1 1 unit 131

4
133 -- 75 90 -- -- 118 -- -- 75 100 A 3RW44 27-@BC@5 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
161 -- 90 110 -- -- 142 -- -- 100 125 B 3RW44 34-@BC@5 1 1 unit 131
196 -- 110 132 -- -- 173 -- -- 125 150 B 3RW44 35-@BC@5 1 1 unit 131
232 -- 132 160 -- -- 203 -- -- 150 200 B 3RW44 36-@BC@5 1 1 unit 131
281 -- 160 200 -- -- 251 -- -- 200 250 B 3RW44 43-@BC@5 1 1 unit 131
352 -- 200 250 -- -- 312 -- -- 250 300 B 3RW44 44-@BC@5 1 1 unit 131
433 -- 250 315 -- -- 372 -- -- 300 350 B 3RW44 45-@BC@5 1 1 unit 131
542 -- 315 355 -- -- 485 -- -- 400 500 B 3RW44 47-@BC@5 1 1 unit 131
617 -- 355 450 -- -- 546 -- -- 450 600 B 3RW44 47-@BC@5 1 1 unit 131
748 -- 400 500 -- -- 667 -- -- 600 750 C 3RW44 53-@BC@5 1 1 unit 131
954 -- 560 630 -- -- 856 -- -- 750 950 C 3RW44 53-@BC@5 1 1 unit 131
1 065 -- 630 710 -- -- 954 -- -- 850 1 050 C 3RW44 55-@BC@5 1 1 unit 131
1 200 -- 710 800 -- -- 1 065 -- -- 950 1 200 C 3RW44 57-@BC@5 1 1 unit 131
1 351 -- 800 900 -- -- 1 200 -- -- 1 050 1 350 C 3RW44 65-@BC@5 1 1 unit 131
1 524 -- 900 1 000 -- -- 1 351 -- -- 1 200 1 500 C 3RW44 65-@BC@5 1 1 unit 131
1 680 -- 1 000 1 200 -- -- 1 472 -- -- 1 300 1 650 C 3RW44 65-@BC@5 1 1 unit 131
-- -- -- -- -- -- 1 680 -- -- 1 500 1 900 C 3RW44 66-@BC@5 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
3)
Order No. supplement for the rated control supply voltage Us
• 115 V AC 3
• 230 V AC 4
1) In the selection table, the unit rated current Ie refers to the induction 2) Soft starter with screw terminals:
motor's rated operational current in the inside-delta circuit. 3RW44 2. to 3RW44 4. Delivery time class A,
The actual current of the device is approx. 58 % of this value. 3RW44 5. to 3RW44 6. Delivery time class B.
3)
Control by way of the internal 24 V DC supply and direct control by means
of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The SIRIUS 3RW44 solid-state soft starters are designed for
easy starting conditions. The selection and ordering data were
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 40
• Maximum starting current in % of motor current Ie: 350
• Maximum number of starts per hour in 1/h: 1
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/53
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44
SIRIUS 3RW44 for very heavy starting (CLASS 30) in inside-delta circuit

3RW44 2. 3RW44 3. 3RW44 4. 3RW44 5. 3RW44 6.

4

1) 1)
3RW ambient temperature 40 °C 3RW ambient temperature 50 °C DT Very heavy starting (CLASS 30) PU PS* PG
Rated values of Rated values of in inside-delta circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inside-delta circuit, rated operational voltage 200 ... 460 V2)
50 15 22 -- -- -- 45 10 15 30 -- } 3RW44 23-@BC@4 1 1 unit 131
62 18.5 30 -- -- -- 55 15 20 40 -- } 3RW44 24-@BC@4 1 1 unit 131
81 22 45 -- -- -- 73 20 25 50 -- } 3RW44 25-@BC@4 1 1 unit 131
99 30 55 -- -- -- 88 25 30 60 -- } 3RW44 25-@BC@4 1 1 unit 131
133 37 75 -- -- -- 118 30 40 75 -- } 3RW44 27-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
161 45 90 -- -- -- 142 40 50 100 -- B 3RW44 35-@BC@4 1 1 unit 131
196 55 110 -- -- -- 173 50 60 125 -- B 3RW44 36-@BC@4 1 1 unit 131
232 75 132 -- -- -- 203 60 75 150 -- B 3RW44 43-@BC@4 1 1 unit 131
281 90 160 -- -- -- 251 75 100 200 -- B 3RW44 43-@BC@4 1 1 unit 131
352 110 200 -- -- -- 312 100 125 250 -- B 3RW44 45-@BC@4 1 1 unit 131
433 132 250 -- -- -- 372 125 150 300 -- B 3RW44 47-@BC@4 1 1 unit 131
542 160 315 -- -- -- 485 150 200 400 -- C 3RW44 53-@BC@4 1 1 unit 131
617 200 355 -- -- -- 546 150 200 450 -- C 3RW44 53-@BC@4 1 1 unit 131
748 250 400 -- -- -- 667 200 250 600 -- C 3RW44 53-@BC@4 1 1 unit 131
954 315 560 -- -- -- 856 300 350 750 -- C 3RW44 55-@BC@4 1 1 unit 131
1 065 355 630 -- -- -- 954 350 400 850 -- C 3RW44 58-@BC@4 1 1 unit 131
1 200 400 710 -- -- -- 1 065 350 450 950 -- C 3RW44 65-@BC@4 1 1 unit 131
1 351 450 800 -- -- -- 1 200 450 500 1 050 -- C 3RW44 65-@BC@4 1 1 unit 131
1 524 500 900 -- -- -- 1 351 450 600 1 200 -- C 3RW44 65-@BC@4 1 1 unit 131
-- -- -- -- -- -- 1 472 550 650 1 300 -- C 3RW44 66-@BC@4 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us3)
• 115 V AC 3
• 230 V AC 4
1) 2)
In the selection table, the unit rated current Ie refers to the induction 3RW44 2.to 3RW44 4. soft starters with screw terminals:
motor's rated operational current in the inside-delta circuit. delivery time class } (preferred type).
The actual current of the device is approx. 58 % of this value. 3) Control by way of the internal 24 V DC supply and direct control by means
of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter In the event of more exacting requirements, it may be necessary
should always be designed on the basis of the required rated to choose a larger device. However, in some cases the de-
operational current of the motor. signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
The SIRIUS 3RW44 solid-state soft starters are designed for tailed technical information for a configuration which is tailored
easy starting conditions. The selection and ordering data were exactly to the application can be found in the manuals. Siemens
determined for the following boundary conditions (see also the recommends the use of the selection and simulation program
notes on page 4/6): Win-Soft Starter.
• Maximum starting time in s: 60
• Maximum starting current in % of motor current Ie: 350
• Maximum number of starts per hour in 1/h: 1

* You can order this quantity or a multiple thereof.

4/54 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

3RW ambient temperature 40 °C1) 3RW ambient temperature 50 °C1) DT Very heavy starting (CLASS 30) PU PS* PG
Rated values of Rated values of in inside-delta circuit (UNIT,
induction motors induction motors SET, M)
Opera- Rating at Opera- Rating at
tional operational voltage Ue tional operational voltage Ue
current Ie current Ie
230 V 400 V 500 V 690 V 1000 V 200 V 230 V 460 V 575 V Order No. Price
A kW kW kW kW kW A hp hp hp hp per PU
Inside-delta circuit, rated operational voltage 400 ... 600 V2)
50 -- 22 30 -- -- 45 -- -- 30 40 A 3RW44 23-@BC@5 1 1 unit 131
62 -- 30 37 -- -- 55 -- -- 40 50 A 3RW44 24-@BC@5 1 1 unit 131
81 -- 45 45 -- -- 73 -- -- 50 60 A 3RW44 25-@BC@5 1 1 unit 131
99 -- 55 55 -- -- 88 -- -- 60 75 A 3RW44 25-@BC@5 1 1 unit 131

4
133 -- 75 90 -- -- 118 -- -- 75 100 A 3RW44 27-@BC@5 1 1 unit 131
Order No. supplement for connection types
• With screw terminals 1
• With spring-type terminals 3
161 -- 90 110 -- -- 142 -- -- 100 125 B 3RW44 35-@BC@5 1 1 unit 131
196 -- 110 132 -- -- 173 -- -- 125 150 B 3RW44 36-@BC@5 1 1 unit 131
232 -- 132 160 -- -- 203 -- -- 150 200 B 3RW44 43-@BC@5 1 1 unit 131
281 -- 160 200 -- -- 251 -- -- 200 250 B 3RW44 43-@BC@5 1 1 unit 131
352 -- 200 250 -- -- 312 -- -- 250 300 B 3RW44 45-@BC@5 1 1 unit 131
433 -- 250 315 -- -- 372 -- -- 300 350 B 3RW44 47-@BC@5 1 1 unit 131
542 -- 315 355 -- -- 485 -- -- 400 500 C 3RW44 53-@BC@5 1 1 unit 131
617 -- 355 450 -- -- 546 -- -- 450 600 C 3RW44 53-@BC@5 1 1 unit 131
748 -- 400 500 -- -- 667 -- -- 600 750 C 3RW44 53-@BC@5 1 1 unit 131
954 -- 560 630 -- -- 856 -- -- 750 950 C 3RW44 55-@BC@5 1 1 unit 131
1 065 -- 630 710 -- -- 954 -- -- 850 1 050 C 3RW44 58-@BC@5 1 1 unit 131
1 200 -- 710 800 -- -- 1 065 -- -- 950 1 200 C 3RW44 65-@BC@5 1 1 unit 131
1 351 -- 800 900 -- -- 1 200 -- -- 1 050 1 350 C 3RW44 65-@BC@5 1 1 unit 131
1 524 -- 900 1 000 -- -- 1 351 -- -- 1 200 1 500 C 3RW44 65-@BC@5 1 1 unit 131
-- -- -- -- -- -- 1 472 -- -- 1 300 1 650 C 3RW44 66-@BC@5 1 1 unit 131
Order No. supplement for connection types
• With spring-type terminals 2
• With screw terminals 6
Order No. supplement for the rated control supply voltage Us3)
• 115 V AC 3
• 230 V AC 4
1) 2)
In the selection table, the unit rated current Ie refers to the induction Soft starter with screw terminals:
motor's rated operational current in the inside-delta circuit. 3RW44 2. to 3RW44 4. Delivery time class A,
The actual current of the device is approx. 58 % of this value. 3RW44 5. to 3RW44 6. Delivery time class B.
3) Control by way of the internal 24 V DC supply and direct control by means
of PLC possible.
Note:
The listed motor ratings are rough guide values. The soft starter
should always be designed on the basis of the required rated
operational current of the motor.
The SIRIUS 3RW44 solid-state soft starters are designed for
easy starting conditions. The selection and ordering data were
determined for the following boundary conditions (see also the
notes on page 4/6):
• Maximum starting time in s: 60
• Maximum starting current in % of motor current Ie: 350
• Maximum number of starts per hour in 1/h: 1
In the event of more exacting requirements, it may be necessary
to choose a larger device. However, in some cases the de-
signed-in safety reserves also permit the listed units to be used
in boundary conditions which are slightly more demanding. De-
tailed technical information for a configuration which is tailored
exactly to the application can be found in the manuals. Siemens
recommends the use of the selection and simulation program
Win-Soft Starter.

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/55
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44
Accessories
Version DT Order No. Price PU PS* PG
per PU (UNIT,
SET, M)

Soft Starter ES 2007 PC communication program1)

Soft Starter ES 2007 Basic
Floating license for one user
E-SW, software and documentation on CD,
3 languages (German/English/French),
communication through system interface
• License key on USB stick, Class A, including CD B 3ZS1 313-4CC10-0YA5 1 1 unit 131

Soft Starter ES 2007 Standard

4

Floating license for one user

E-SW, software and documentation on CD,
3 languages (German/English/French),
communication through system interface
• License key on USB stick, Class A, including CD B 3ZS1 313-5CC10-0YA5 1 1 unit 131
Soft Starter ES 2007 Premium
Floating license for one user
E-SW, software and documentation on CD,
3 languages (German/English/French),
communication through system interface or PROFIBUS
• License key on USB stick, Class A, including CD B 3ZS1 313-6CC10-0YA5 1 1 unit 131
SIRIUS 3RW44 Soft Starter Function Block Library for SIMATIC PCS 71)
Scope of supply:
AS modules and faceplates for integrating SIRIUS
3RW44 into the PCS 7 process control system, for PCS 7,
version V 6.1/V 7.0
Engineering software } 3ZS1 633-1XX00-0YA0 1 1 unit 131
for one engineering station (single license) including run-
time software for execution of the
AS module in an automation system
(single license), German/English/French,
Type of delivery:
3ZS1 633-1XX00-0YA0 on CD incl. electronic documentation
in German/English/Portuguese
Runtime software } 3ZS1 633-2XX00-0YB0 1 1 unit 131
for execution of the AS module in an
automation system (single license),
Type of delivery:
License without software and documentation
1)
For detailed information about the Soft Starter ES software program and
about the SIRIUS 3RW44 Soft Starter Function Block Library for SIMATIC
PCS 7 see Chapter 12 "Planning, Configuration and Visualizing for SIRIUS".

* You can order this quantity or a multiple thereof.

4/56 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

Version DT Order No. Price PU PS* PG

per PU (UNIT,
SET, M)

PC cables
For PC/PG communication with A 3UF7 940-0AA00-0 1 1 unit 131
SIRIUS 3RW44 soft starters
Through the system interface, for connecting to
the serial interface of the PC/PG

3UF7 940-0AA00-0
USB/serial adapters

4
For connecting the PC cable to B 3UF7 946-0AA00-0 1 1 unit 131
the USB interface of a PC
We recommend, in conjunction with 3RW44 soft starter,
using SIMOCODE pro 3UF7, 3RK3 modular safety sys-
tem, ET 200S/ECOFAST/ET 200pro motor starters, AS-i
safety monitor, AS-i analyzer
PROFIBUS communication modules
Modules can be plugged into the soft starters for inte- A 3RW49 00-0KC00 1 1 unit 131
grating the starters in the PROFIBUS network with DPV1
slave functionality.
On Y-link the soft starter has only DPV0 slave
functionality.

3RW49 00-0KC00
External display and operator modules
For indicating and operating the functions provided by } 3RW49 00-0AC00 1 1 unit 131
the soft starter using an externally mounted display and
operator module in degree of protection IP54
(e. g. in the control cabinet door)
Connection cable
From the device interface (serial) of the 3RW44 soft
3RW49 00-0AC00 starter to the external display and operator module
• Length 0.5 m, flat A 3UF7 932-0AA00-0 1 1 unit 131
• Length 0.5 m, round A 3UF7 932-0BA00-0 1 1 unit 131
• Length 1.0 m, round A 3UF7 937-0BA00-0 1 1 unit 131
• Length 2.5 m, round A 3UF7 933-0BA00-0 1 1 unit 131

* You can order this quantity or a multiple thereof.

Illustrations are approximate Siemens IC 10 · 2011 4/57
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

For Version DT Order No. Price PU PS* PG

soft starters per PU (UNIT,
SET, M)
Type
Box terminal blocks for soft starters
Box terminal blocks
(2 units are required for each device)
3RW44 2. Included in the scope of supply
3RW44 3. • Up to 70 mm2 } 3RT19 55-4G 1 1 unit 101
• Up to 120 mm2 } 3RT19 56-4G 1 1 unit 101
Auxiliary conductor connection for box B 3TX7 500-0A 1 1 unit 101
3RT19 terminals
3RW44 4. • Up to 240 mm2 } 3RT19 66-4G 1 1 unit 101
(with auxiliary conductor connection)
4

Covers for soft starters

Terminal covers for box terminals
Additional touch protection to be fitted at the box termi-
nals (2 units required per device)
3RW44 2. and } 3RT19 56-4EA2 1 1 unit 101
3RW44 3.
3RW44 4. } 3RT19 66-4EA2 1 1 unit 101
Terminal covers for cable lugs and busbar
connections
3RW44 2. and For complying with the phase clearances } 3RT19 56-4EA1 1 1 unit 101
3RW44 3. and as touch protection
3RW44 4. (2 units required per contactor) } 3RT19 66-4EA1 1 1 unit 101
Also fits on mounted box terminals.
3RT19.6-4EA1
Manuals 3RW441)
3RW44 3ZX10 12-0RW44-1AB1
Operating instructions1)
3RW44 3ZX10 12-0RW44-0AA0
1)
The operating instructions are included in the scope of supply of the soft
starter or are available – like the manual – as a PDF download from the
Service&Support portal at
www.siemens.com/industrial-controls/support --> Controls --> Soft Starters
and Solid-State Switching Devices --> SIRIUS 3RW Soft Starters.
Spare parts
For Version DT Order No. Price PU PS* PG
soft starters per PU (UNIT,
SET, M)
Type
Fans
Fans
3RW44 2. and 115 V AC } 3RW49 36-8VX30 1 1 unit 131
3RW44 3. 230 V AC } 3RW49 36-8VX40 1 1 unit 131
3RW44 4. 115 V AC } 3RW49 47-8VX30 1 1 unit 131
230 V AC } 3RW49 47-8VX40 1 1 unit 131
3RW49 3RW44 5. and 115 V AC } 3RW49 57-8VX30 1 1 unit 131
3RW44 6. 1) 230 V AC } 3RW49 57-8VX40 1 1 unit 131
3RW44 6. 2) 115 V AC } 3RW49 66-8VX30 1 1 unit 131
230 V AC } 3RW49 66-8VX40 1 1 unit 131
1) 3RW44 6. mounting on output side.
2)
For mounting on front side.

* You can order this quantity or a multiple thereof.

4/58 Siemens IC 10 · 2011 Illustrations are approximate
 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44

■ More information
Application examples for normal starting (CLASS 10)
Normal starting CLASS 10 (up to 20 s with 350 % In motor)
The soft starter rating can be selected to be as high as the rating of the motor used
Application Conveyor belt Roller conveyor Compressor Small fan1) Pump Hydraulic pump
Starting parameters
• Voltage ramp and current
limiting
- Starting voltage % 70 60 50 30 30 30
- Starting time s 10 10 10 10 10 10
- Current limit value Deactivated Deactivated 4 x IM 4 x IM Deactivated Deactivated
• Torque ramp
- Starting torque 60 50 40 20 10 10

4
- End torque 150 150 150 150 150 150
- Starting time 10 10 10 10 10 10
• Breakaway pulse Deactivated (0 ms) Deactivated (0 ms) Deactivated (0 ms) Deactivated (0 ms) Deactivated (0 ms) Deactivated (0 ms)
Ramp-down mode Smooth Smooth Free ramp-down Free ramp-down Pump ramp-down Free ramp-down
ramp-down ramp-down

Application examples for heavy starting (CLASS 20)

Heavy starting CLASS 20 (up to 40 s with 350 % In motor)
The soft starter has to be selected one performance class higher than the motor used
Application Stirrer Centrifuge Milling machines
Starting parameters
• Voltage ramp and current
limiting
- Starting voltage % 30 30 30
- Starting time s 30 30 30
- Current limit value 4 x IM 4 x IM 4 x IM
• Torque ramp
- Starting torque 30 30 30
- End torque 150 150 150
- Starting time 30 30 30
• Breakaway pulse Deactivated (0 ms) Deactivated (0 ms) Deactivated (0 ms)
Ramp-down mode Free ramp-down Free ramp-down Free ramp-down or DC braking

Application examples for very heavy starting (CLASS 30)

Very heavy starting CLASS 30 (up to 60 s with 350 % In motor)
The soft starter has to be selected two performance classes higher than the motor used
Application Large fans2) Mills Breakers Circular saws/bandsaws
Starting parameters
• Voltage ramp and current
limiting
- Starting voltage % 30 50 50 30
- Starting time s 60 60 60 60
- Current limit value 4 x IM 4 x IM 4 x IM 4 x IM
• Torque ramp
- Starting torque 20 50 50 20
- End torque 150 150 150 150
- Starting time 60 60 60 60
• Breakaway pulse Deactivated (0 ms) 80 %; 300 ms 80 %; 300 ms Deactivated (0 ms)
Ramp-down mode Free ramp-down Free ramp-down Free ramp-down Free ramp-down
1)
The mass inertia of the fan is <10 times the mass inertia of the motor.
2)
The mass inertia of the fan is t10 times the mass inertia of the motor.
Note:
These tables present sample set values and device sizes. They
are intended only for the purposes of information and are not
binding. The set values depend on the application in question
and must be optimized during commissioning.
The soft starter dimensions should be checked where necessary
with the Win-Soft Starter software or with the help of Technical
Assistance.

Siemens IC 10 · 2011 4/59

 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44
Circuit concept Configuration
The SIRIUS 3RW44 soft starters can be operated in two different The 3RW44 solid-state soft starters are designed for normal
types of circuit. starting. In case of heavy starting or increased starting fre-
• Inline circuit quency, a larger device must be selected.
The controls for isolating and protecting the motor are simply For long starting times it is recommended to have a PTC sensor
connected in series with the soft starter. The motor is con- in the motor. This also applies for the ramp-down modes smooth
nected to the soft starter with three cables. ramp-down, pump ramp-down and DC braking, because during
• Inside-delta circuit the ramp-down time in these modes, an additional current load-
The wiring is similar to that of wye-delta starters. The phases of ing applies in contrast to free ramp-down.
the soft starter are connected in series with the individual motor No capacitive elements are permitted in the motor feeder be-
windings. The soft starter then only has to carry the phase cur- tween the SIRIUS 3RW soft starter and the motor (e. g. no reac-
rent, amounting to about 58 % of the rated motor current (con- tive-power compensation equipment). In addition, neither static
ductor current). systems for reactive-power compensation nor dynamic PFC
4

Comparison of the types of circuit (Power Factor Correction) must be operated in parallel during
starting and ramp-down of the soft starter. This is important to
L 1 N S B 0 _ 0 0 4 2 4 prevent faults arising on the compensation equipment and/or the
L 2 soft starter.
L 3
N All elements of the main circuit (such as fuses and controls)
P E should be dimensioned for direct starting, following the local
short-circuit conditions. Fuses, controls and overload relays
must be ordered separately.
A bypass contact system and solid-state overload relay are al-
ready integrated in the 3RW44 soft starter and therefore do not
have to be ordered separately.
The harmonic component load for starting currents must be
taken into consideration for the selection of motor starter protec-
tors (selection of release).
Note:
When induction motors are switched on, voltage drops occur as
Inline circuit: a rule on starters of all types (direct starters, wye-delta starters,
Rated current Ie corresponds to the rated motor current In, soft starters). The infeed transformer must always be dimen-
3 cables to the motor sioned such that the voltage dip when starting the motor remains
within the permissible tolerance. If the infeed transformer is di-
L 1 N S B 0 _ 0 0 4 2 5

L 2
mensioned with only a small margin, it is best for the control volt-
L 3
age to be supplied from a separate circuit (independently of the
N main voltage) in order to avoid the potential switching off of the
P E soft starter.
Device interface, PROFIBUS DP communication module,
Soft Starter ES parameterizing and operating software
U 2 L 2
The 3RW44 electronic soft starters have a PC interface for com-
U 1
municating with the Soft Starter ES software or for connecting the
T 1 T 2 external display and operator module. If the optional PROFIBUS
V 1 communication module is used, the 3RW44 soft starter can be
L 1 V 2 integrated in the PROFIBUS network and communicate using
the GSD file or Soft Starter ES Premium software.
W 2 W 1 T 3 L 3
SIRIUS 3RW44 Soft Starter Function Block Library for
SIMATIC PCS 7
Inside-delta circuit:
Rated current Ie corresponds to approx. 58 % of the rated motor current The SIRIUS 3RW44 soft starter PCS 7 function block library can
In, 6 cables to the motor (as with wye-delta starters) be used for simple and easy integration of SIRIUS 3RW44 soft
starters into the SIMATIC PCS 7 process control system. The
Which circuit? SIRIUS 3RW44 soft starter PCS 7 function block library contains
Using the inline circuit involves the lowest wiring outlay. If the soft the diagnostics and driver blocks corresponding with the
starter to motor connections are long, this circuit is preferable. SIMATIC PCS 7 diagnostics and driver concept as well as the el-
With the inside-delta circuit there is double the wiring complexity ements (symbols and faceplates) required for operator control
but a smaller size of device can be used at the same rating. and process monitoring.
Thanks to the choice of operating mode between the inline cir-
cuit and inside-delta circuit, it is always possible to select the
most favorable solution.
The braking function is possible only in the inline circuit.

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 © Siemens AG 2010

SIRIUS 3RW Soft Starters

3RW44 for High-Feature Applications
3RW44
Manual for SIRIUS 3RW44 Training course for SIRIUS soft starters (SD-SIRIUSO)
Besides containing all important information on configuring, Siemens offers a 2-day training course on the SIRIUS solid-state
commissioning and servicing, the manual also contains exam- soft starters to keep customers and own personnel up-to-date on
ple circuits and the technical specifications for all devices. configuring, commissioning and maintenance issues.
Win-Soft Starter selection and simulation program You can find more information on our SITRAIN website:
With this software, you can simulate and select all Siemens soft www.siemens.com/sitrain
starters, taking into account various parameters such as mains --> For course name select "SD-SIRIUSO"
properties, motor and load data, and special application Please direct enquiries and applications to SITRAIN Customer
requirements. Support:
The software is a valuable tool, which makes complicated, Tel.: +49 (1805) 23 56 11
lengthy manual calculations for determining the required soft Fax: +49 (1805) 23 56 12
starters superfluous. E-mail: info@sitrain.com

4
The Win-Soft Starter selection and simulation program can be
downloaded from:
www.siemens.com/softstarter --> Software
You can find more information about soft starters on the Internet
likewise at:
www.siemens.com/softstarter

Siemens IC 10 · 2011 4/61