SIEMENS
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Siemens IC 10 · 2017
SIRIUS 3RW Soft Starters
3RW30, 3RW40 for Standard Applications
3RW40
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)
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 20, 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
40
40
40
-
Starting time
s
10
10
10
10
10
10
-
Current limiting value
5 x
I
M
5 x
I
M
4 x
I
M
4 x
I
M
4 x
I
M
4 x
I
M
Stopping time
s
5
5
0
0
10
0
Heavy starting CLASS 20
(up to 40 s with 350 %
I
n Motor
, one start per hour)
The soft starter has to be selected at least one performance class higher than the motor used.
Application
Stirrers
Centrifuges
Starting parameters
• Voltage ramp and current
limiting
-
Starting voltage
%
40
40
-
Starting time
s
20
20
-
Current limiting value
4 x
I
M
4 x
I
M
Stopping time
0
0
© Siemens AG 2016