SIEMENS
6/2
Siemens IC 10 · 2017
Switching Devices – Soft Starters and Solid-State Switching Devices
Introduction
6
■
Overview
SIRIUS 3RW soft starters
SIRIUS 3RW soft starters permit soft starting and soft 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 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
• Fit perfectly in the SIRIUS modular system (3RW30 and
3RW40)
Use of soft starters in conjunction with IE3/IE4 motors
Note:
When using 3RW soft starters in conjunction with highly energy-
efficient IE3/IE4 motors, please observe the information on
dimensioning and configuring,
see "Application Manual for
SIRIUS Controls with IE3/IE4 Motors",
.
For more information
see Preface, page 7
.
More information
Home page,
see www.siemens.com/soft-starter
Industry Mall,
see www.siemens.com/product?3RW
Online configurator,
see www.siemens.com/sirius/configurators
Simulation Tool for Soft Starters (STS),
see page 14/5 or
3RW30
3RW40
3RW44
Article No.
Page
3RW soft starters
3RW soft starters for standard applications
3RW30 soft starters
• SIRIUS 3RW30 soft starters for soft starting of three-phase asynchronous
motors
• Current range of up to 106 A
• Performance range of up to 55 kW (at 400 V), up to 75 hp (at 460 V)
3RW30
6/9
3RW40 soft starters
• SIRIUS 3RW40 soft starters with the integral functions
-
solid-state motor overload and intrinsic device protection and
-
adjustable current limiting
for the soft starting and stopping of three-phase asynchronous motors
• Current range of up to 432 A
• Performance range of up to 250 kW (at 400 V), up to 300 hp (at 460 V)
3RW40
6/20
3RW soft starters for High Feature applications
3RW44 soft starters
•
In addition to soft starting and soft ramp-down, the solid-state SIRIUS 3RW44
soft starters provide numerous functions for higher-level requirements
• Current range of up to 1 214 A
• Performance range
-
in inline circuit: up to 710 kW (at 400 V), up to 950 hp (at 460 V)
-
in inside-delta circuit: up to 1 200 kW (at 400 V), up to 1 700 hp (at 460 V)
3RW44
6/35
© Siemens AG 2016