Application Examples For Very Heavy Starting (Class 30) - Siemens 3RW44 Manual

Configuration instructions
3.2 Startup class
3.2.3

Application examples for very heavy starting (CLASS 30)

Heavy starting CLASS 30 (up to 60 s with 350 % I
The soft starter has to be selected two power classes 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
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.
24
Large fans
30
60
4 x I
M
20
150
60
Deactivated (0 ms)
Coasting down
n motor
Mills
50
60
4 x I
M
50
150
60
80 %; 300 ms
Coasting down
)
Crushers
50
60
4 x I
M
50
150
60
80 %; 300 ms
Coasting down
Manual, 03/2017, NEB535219502000/RS-AB/008
Circular
saws/bandsaws
30
60
4 x I
M
20
150
60
Deactivated (0 ms)
Coasting down
3RW44 soft starters