SIEMENS
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Siemens IC 10 · 2017
SIRIUS 3RW Soft Starters
3RW44 for High Feature Applications
Accessories
6
■
More information
Application examples for normal starting (CLASS 10)
1)
The mass inertia of the fan is 10 times the mass inertia of the motor.
Application examples for heavy starting (CLASS 20)
Application examples for very heavy starting (CLASS 30)
1)
The mass inertia of the fan is
10 times the mass inertia of the motor.
Note:
These tables present sample set values and device dimensions.
They are intended only for the purposes of information and are
not binding. The set values depend on the application in
question and must be optimized during commissioning.
For dimensioning soft starters under other boundary conditions,
also for heavy starting up to CLASS 30, we recommend our
Simulation Tool for Soft Starters (STS):
or our Technical Assistance:
Tel.: +49 (0) 911-895-5900,
Email:
technical-assistance@siemens.com
.
Normal starting CLASS 10
(up to 20 s with 350 %
I
n Motor
, one start per hour)
The soft starter rating can be selected to be as high as the rating of the motor used
Application
Conveyor belts
Roller conveyors
Compressors
Small fans
1)
Pumps
Hydraulic pumps
Starting parameters
• Voltage ramp and current
limiting
-
Starting voltage
%
70
60
50
30
30
30
-
Starting time
s
10
10
10
10
10
10
-
Current limiting value
Deactivated
Deactivated
4 x
I
M
4 x
I
M
Deactivated
Deactivated
• Torque ramp
-
Start torque
%
60
50
40
20
10
10
-
Final torque
%
150
150
150
150
150
150
-
Starting time
s
10
10
10
10
10
10
• Breakaway pulse
Deactivated (0 ms)
Deactivated (0 ms)
Deactivated (0 ms)
Deactivated (0 ms)
Deactivated (0 ms)
Deactivated (0 ms)
Ramp-down mode
Soft stop
Soft stop
Free ramp-down
Free ramp-down
Pump stop
Free ramp-down
Heavy starting CLASS 20
(up to 40 s with 350 %
I
n Motor
, one start per hour)
The soft starter has to be selected one performance class higher than the motor used
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
-
Start torque
%
30
30
30
-
Final torque
%
150
150
150
-
Starting time
s
30
30
30
• Breakaway pulse
Deactivated (0 ms)
Deactivated (0 ms)
Deactivated (0 ms)
Ramp-down mode
Free ramp-down
Free ramp-down
Free ramp-down or DC braking
Very heavy starting CLASS 30
(up to 60 s with 350 %
I
n Motor
, one start per hour)
The soft starter has to be selected two performance classes higher than the motor used
Application
Large fans
1)
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
-
Start torque
%
20
50
50
20
-
Final torque
%
150
150
150
150
-
Starting time
s
60
60
60
60
• Breakaway pulse
Deactivated (0 ms)
80 %, 300 ms
80 %, 300 ms
Deactivated (0 ms)
Ramp-down mode
Free ramp-down
Free ramp-down
Free ramp-down
Free ramp-down
© Siemens AG 2016