Areas Of Application / Load Types - Siemens SIRIUS 3RW55 Manual

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1.6 Areas of application / load types

1.6 Areas of application / load types
Starting of a motor causes a rapid change in the load current. The resulting torque impulses
place severe stresses on the mechanical parts of a machine or plant. Moreover, voltage dips
can occur in the power supply system which can have a negative influence on other devices:
● Flicker in lights
● Influence on computer systems
● Contactors and relays dropping out
The 3RW55 soft starter controls the voltage continuously. The torque and the current are
thus also increased continuously. The power supply system is safeguarded against peak
loads and the drive train is protected against damage:
● Smooth starting / stopping, e.g. for conveyor belts
● No pressure surges, e.g. for pumps
● Increased service life of the pipe system, e.g. for compressors
● Reduced starting current, e.g. for agitators
● Reduced stress on gearbox and V belt, e.g. for saws
18
Conveyor belts
Small / large fan
Agitators
Mills
Roller conveyors
Pumps
Centrifuges
Crushers
Manual, 08/2018, A5E35630887002A/RS-AB/002
Compressors
Hydraulic pumps
Milling machines
Circular saw / band saw
SIRIUS 3RW55 soft starter