Siemens 3RW44 User Manual

Configuration instructions
3.2 Startup class
3RW44 soft starters
24 Manual, 03/2017, NEB535219502000/RS-AB/008
3.2.3
Application examples for very heavy starting (CLASS 30)
Heavy starting CLASS 30 (up to 60 s with 350 % I
n motor
)
The soft starter has to be selected two power classes higher than that of the implemented
motor.
Application
Large fans
Mills
Crushers
Circular
saws/bandsaws
Starting parameters
Voltage ramp and
current limiting
• Starting voltage %
30 50 50 30
• Starting time s
60 60 60 60
• Current limiting
value
4 x I
M
4 x I
M
4 x I
M
4 x I
M
Torque ramp
• Starting torque
20 50 50 20
• End torque
150 150 150 150
• Starting time
60 60 60 60
Breakaway pulse
Deactivated (0 ms)
80 %; 300 ms
80 %; 300 ms
Deactivated (0 ms)
Coasting method
Coasting down
Coasting down
Coasting down
Coasting down
Note
The settings and device dimensions indicated in these tables are examples only; they are
merely provided for information purposes and are not binding.
Set values depend on the
application in question and must be optimized during commissioning.

Siemens 3RW44 Specifications

General

Brand	Siemens
Model	3RW44
Category	Control Unit
Language	English