Auto Reset; Acknowledging Faults; Other Functions Of The Reset Button; Motor Protection Trip Test - Siemens SIRIUS 3RW30 Manual

Functions
5.4 Functions of the RESET buttons
5.4.2.3

Auto RESET

Auto RESET (AUTO LED is yellow)
If you set the RESET mode to AUTO, the fault is automatically reset.
● If the motor overload protection function trips: after 5 minutes
● On tripping the intrinsic device protection:
- after 30 seconds upon overload of the thyristors,
- after 60 seconds upon overload of the bypasses
5.4.2.4

Acknowledging faults

For information on whether faults can be acknowledged, and on the corresponding LED and
output contact states, refer to chapter Messages and diagnosis (Page 57).
5.4.3

Other functions of the RESET button

5.4.3.1

Motor protection trip test

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.
RESET/TEST button of 3RW402, 3RW403
and 3RW404
50
WARNING
Automatic restart
Can result in death, serious injury, or property damage.
The automatic reset mode (AUTO RESET) must not be used in applications where there
is a risk of serious injury to persons or substantial damage to property if the motor starts
up again unexpectedly. The start command (e.g. issued by a contact or the PLC) must
be reset prior to issuing a RESET command because the motor attempts to restart
again automatically following this RESET command if a start command is still present.
This particularly applies if the motor protection has tripped. For safety reasons, you are
advised to integrate the group fault output (terminals 95 and 96) in the controller.
RESET/TEST button of 3RW405 and
3RW407
Manual, 10/2018, NEB535199502000/RS-AB/005
SIRIUS 3RW30 / 3RW40