Application Examples For Heavy Starting (Class 20) - Siemens 3RW44 Manual

3.2.2

Application examples for heavy starting (CLASS 20)

Heavy starting CLASS 20 (up to 40 s with 350 % I
The soft starter has to be selected one power class higher than that of the implemented
motor.
Application
Starting parameters
Voltage ramp and current
limiting
Starting voltage %
•
Starting time s
•
Current limiting value
•
Torque ramp
Starting torque
•
End torque
•
Starting time
•
Breakaway pulse
Coasting method
3RW44 soft starters
Manual, 03/2017, NEB535219502000/RS-AB/008
Stirrers
30
30
4 x I
M
30
150
30
Deactivated (0 ms)
Coasting down
)
n motor
Centrifuges
30
30
4 x I
M
30
150
30
Deactivated (0 ms)
Coasting down
Configuration instructions
3.2 Startup class
Milling machines
30
30
4 x I
M
30
150
30
Deactivated (0 ms)
Coasting down or DC
braking
23