3RW3 semiconductor motor control unit
SIRIUS System Manual
8-14
GWA 4NEB 430 0999-02b
8.2.3 Comparison of the 3RW3 semiconductor motor control unit (soft starter) with the
SIKOSTART 3RW22 and SIKOSTART 3RW34 motor control units
Soft starters are available for different applications.
The following graphic provides an overview of the different soft starters:
Figure 8-8: Overview of soft starters
SIKOSTART 3RW22
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
SIKOSTART 3RW34
S0
S2
S3
S00
Functions
High
End
Low
End
5.5
11
22 45
710 1000
12/16/25A
6/9A
2 phase
in-line only
SIRIUS
3RW30/31 soft starters
+ 575V+
auxiliary contacts
Power in kW
at 400 V
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