![Siemens SIRIUS 3RW40 Manual Download Page 32](http://html.mh-extra.com/html/siemens/sirius-3rw40/sirius-3rw40_manual_383232032.webp)
Functions
5.3 Motor protection / intrinsic device protection (3RW40 only)
SIRIUS 3RW30 / 3RW40
32
Manual, 01/2010, 535 1995-02 DS01
Water hammer can be reduced compared to direct or wye-delta starting by using the SIRIUS
3RW40 soft starter. An optimum pump stop is achieved using a SIRIUS 3RW44 soft starter
with an integrated pump stop function (refer to chapter Comparison of device functions [Page
24]).
Typical applications for soft stop
NOTICE
Use soft stop for
• Pumps to reduce water hammer.
• Conveyor belts to prevent the conveyed product from tilting.
5.3
Motor protection / intrinsic device protection (3RW40 only)
5.3.1
Motor protection function
The motor overload protection function is implemented on the basis of the winding
temperature. This indicates whether the motor is overloaded or functioning in the normal
operating range.
The winding temperature can either be calculated with the help of the integrated, electronic
motor overload function or measured with a connected motor thermistor.
0RWRU
WRUTXH
0
0
1RPLQDO
RSHUDWLRQ
6WRSFRPPDQG
DWVRIWVWDUWHU
6WRSSLQJWLPH
7LPHW
V
If the soft starter is disconnected because the motor overload protection or the intrinsic
device protection trips, you must wait a defined cooling time (recovery time) prior to
acknowledging the fault or starting the motor again. (Motor overload tripping time: 60
seconds, temperature sensor: after cooling, intrinsic device protection tripping time: >
30 seconds)
Summary of Contents for SIRIUS 3RW40
Page 1: ...Soft starters SIRIUS 3RW30 3RW40 Manual 01 2010 Industrial Controls Answers for industry ...
Page 2: ......
Page 68: ...Connecting 9 1 Electrical connection SIRIUS 3RW30 3RW40 68 Manual 01 2010 535 1995 02 DS01 ...
Page 210: ...Index SIRIUS 3RW30 3RW40 210 Manual 01 2010 535 1995 02 DS01 ...
Page 211: ......