Siemens SIRIUS 3RW40, Manual

Page: 78 / 212

Configuration
11.2 Startup class
SIRIUS 3RW30 / 3RW40
78
Manual, 01/2010, 535 1995-02 DS01
11.2.2 Application examples for heavy-duty starting (CLASS 20): 3RW40 only
Recommended basic parameter settings
Assuming the conditions and constraints indicated below apply, the soft starter size must be
at least one power class higher than the motor rating for heavy-duty starting (CLASS 20).
You can find a suitable soft starter for the required motor rating based on the required startup
class in chapter Technical data [Page 121].
For typical applications where heavy-duty starting can apply as well as recommended
parameter settings for the soft starter, refer to the table below.
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General conditions and constraints
CLASS 20 (heavy-duty starting)
3RW40 2. / 3RW40 3. / 3RW40 4. Maximum ramp-up time 20 s,
300 % current limiting,
max. 5 starts / hour
3RW40 5. / 3RW40 7. Maximum ramp-up time 40 s,
350 % current limiting,
max. 1 start / hour
ON time 30 %
Standalone assembly
Installation altitude
Max. 1000 m / 3280 ft
Ambient temperature kW 40 °C / 104 °F
Note
The settings and device dimensions indicated in these tables are examples only; they are
merely provided for information purposes and are not binding. The actual settings depend on
the application and must be optimized when the equipment is commissioned.
If other conditions and constraints apply, either refer to chapter Technical data [Page 121] or
check your requirements and selection with the Win-Soft Starter software or with Technical
Assistance (chapter Important notes [Page 11])