Calculating The Switching Frequency (Example) - Siemens SIRIUS 3RW30 Manual

Configuration
12.7 Calculating the permissible switching frequency
Clearances from other devices
12.7.2

Calculating the switching frequency (example)

Problem
The maximum permissible switching frequency of a 5.5 kW (12.5 A) 3RW4024 soft starter
must be determined. The requirements are side-by-side assembly and vertical mounting. A
run-up time of approx. 3 s at an ambient temperature of 40 °C is specified as a
supplementary condition (e.g. a pump motor with CLASS 10 starting). The soft starter must
be connected to a 3RV2021 motor starter protector by means of cables. (Clearance between
3RV and 3RW ≥ 40 mm)
98
Article No.
3RW301./3RW302.
3RW303./3RW304
3RW402.
3RW403./3RW404.
3RW405./3RW407.
a (mm) a (in) b (mm) b (in)
15 0.59 60
30 1.18 60
15 0.59 60
30 1.18 60
5 0.2 100
Manual, 10/2018, NEB535199502000/RS-AB/005
c (mm) c (in)
2.36 40 1.56
2.36 40 1.56
2.36 40 1.56
2.36 40 1.56
4 75 3
SIRIUS 3RW30 / 3RW40