User Manual

Product description
3.3 Functional principle of the SIRIUS 3RW30 and 3RW40 soft starters
SIRIUS 3RW30 / 3RW40
Manual, 10/2010, 535199502000 DS 03
23
3.3.3 Applications and use
Applications and selection criteria
The SIRIUS 3RW30 and 3RW40 soft starters represent a good alternative to direct or wye-
delta starters.
The most important advantages are:
● Soft start
● Soft stop (3RW40 only)
● Uninterrupted switching without current peaks that place a heavy load on the system
● Simple installation and commissioning
● Compact, space-saving design
Applications
The typical applications include:
● Conveyor belts
● Roller conveyors
● Compressors
● Fans
● Pumps
● Hydraulic pumps
● Agitators
● Circular saws / band saws
Advantages
Conveyor belts and transport systems:
● Smooth starting
● Smooth stopping
Rotary pumps and piston pumps:
● No pressure surges
● Increased service life of the pipe system
Agitators and mixers:
● Reduced starting current
Fans:
● Protection for the gearbox and V belt