Thermistor Motor Protection; Motor Protection Trip Test - Siemens SIRIUS 3RW30 Manual

Commissioning

12.7 Thermistor motor protection

12.7 Thermistor motor protection
(Optional for 3RW40 2. to 3RW40 4. with 24 V AC/DC rated control voltage)
Thermistor motor protection
After removing the copper jumper between T11/21 and T22, you can connect and evaluate
either a Klixon thermistor integrated in the motor winding (at terminal T11/T21-T22) or a type
A PTC (at terminal T11/T21-T12).
12.8

Motor protection trip test

TEST / RESET button
You initiate a motor overload trip by pressing the RESET / TEST button for longer than five
seconds. The SIRIUS 3RW40 soft starter is tripped by the fault signal at the OVERLOAD
LED, the FAILURE / OVERLOAD contact 95-98 closes, and the motor that is connected and
running is switched off.
108
SIRIUS 3RW30 / 3RW40
Manual, 01/2010, 535 1995-02 DS01