Configuration instructions
3.2 Startup class
3RW44 soft starters
Manual, 03/2017, NEB535219502000/RS-AB/008
23
3.2.2
Application examples for heavy starting (CLASS 20)
Heavy starting CLASS 20 (up to 40 s with 350 % I
n
motor
)
The soft starter has to be selected one power class higher than that of the implemented
motor.
Application
Stirrers
Centrifuges
Milling machines
Starting parameters
Voltage ramp and current
limiting
•
Starting voltage %
30
30
30
•
Starting time s
30
30
30
•
Current limiting value
4 x I
M
4 x I
M
4 x I
M
Torque ramp
•
Starting torque
30
30
30
•
End torque
150
150
150
•
Starting time
30
30
30
Breakaway pulse
Deactivated (0 ms)
Deactivated (0 ms)
Deactivated (0 ms)
Coasting method
Coasting down
Coasting down
Coasting down or DC
braking