Siemens SIRIUS 3RW40 - Application Examples for Heavy-Duty Starting (CLASS 20): 3 RW40 Only

Configuration
12.2 Startup class
SIRIUS 3RW30 / 3RW40
Manual, 10/2018, NEB535199502000/RS-AB/005
91
12.2.2
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 127).
For typical applications where heavy-duty starting can apply as well as recommended
parameter settings for the soft starter, refer to the table below.
General conditions and constraints
CLASS 20 (heavy-duty starting)
3RW402. / 3RW403. / 3RW404. Maximum starting time 20 s,
300% current limiting,
max. 5 starts / hour
3RW405. / 3RW407. Maximum starting 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.
I
f other conditions and constraints apply, either refer to the chapter Technical data
(Page
127) or check your requirements and selection with Technical Assistance (Page 15).