User Manual

Functions

5.4 Functions of the RESET buttons

SIRIUS 3RW30 / 3RW40

Manual, 10/2010, 535199502000 DS 03

5.4.2.4 AUTO RESET

AUTO RESET (AUTO LED = yellow)

If you set the RESET mode to AUTO, a fault is automatically reset as follows:

● If the motor overload protection function trips: after 5 minutes

● If the intrinsic device protection function trips:

- after 30 seconds upon overload of the thyristors,

- after 60 seconds upon overload of the bypasses

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.

5.4.2.5 Acknowledging faults

For information about whether or not faults can be acknowledged as well as the

corresponding LED and output contact states, refer to chapter Diagnostics and fault signals

(Page 48).

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 on the 3RW40 2,

3RW40 3, and 3RW40 4

RESET / TEST button on the 3RW40 5 and

3RW40 7