Comparison Of The 3Rw3 Semiconductor Motor Control Unit (Soft Starter) With The Sikostart 3Rw22 And Sikostart 3Rw34 Motor Control Units; Figure 8-8: Overview Of Soft Starters - Siemens sirius System Manual

3RW3 semiconductor motor control unit
8.2.3 Comparison of the 3RW3 semiconductor motor control unit (soft starter) with the
SIKOSTART 3RW22 and SIKOSTART 3RW34 motor control units
SIKOSTART 3RW22
8-14
Soft starters are available for different applications.
The following graphic provides an overview of the different soft starters:
Functions
High
End
Low
12/16/25A
End
S0
+ 575V+
auxiliary contacts
S00
6/9A
5.5 11

Figure 8-8: Overview of soft starters

The SIKOSTART 3RW22 is suitable for drives that place high demands on
the functionality of the starter. It covers a power range from 3 kW to 710 kW
(at 400 V).
SIKOSTART 3RW22 offers the following:
• Soft starting and soft coasting down
• Break-loose torque
• DC brakes
• Energy-saving operation
• Temperature monitoring
• Operation using a PC and an RS232 interface
• Selection and configuration program
• Current and voltage limitation
• Pump functionalities (e.g. pump coasting down)
• Startup detection
• Three parameter sets
• Different coasting-down types
• Electronic device overload protection
The SIKOSTART 3RW22 application manual presents the various application
areas and circuit variants (order no. E20001-P285-A484-V3).
SIKOSTART 3RW22
2 phase
in-line only
S3
S2
SIRIUS
3RW30/31 soft starters
22 45
SIKOSTART 3RW34
710
Power in kW
at 400 V
SIRIUS System Manual
GWA 4NEB 430 0999-02b
1000