Installation, connection and feeder configuration
4.2 Design of the feeder
3RW44 soft starters
Manual, 03/2017, NEB535219502000/RS-AB/008
33
The 3RW44 soft starter performs the functions of the contact element and motor protection.
Hazardous voltage.
Danger to life or risk of serious injury.
If line voltage is present at the input terminals of the soft starter, hazardous voltage may still
be present at the soft starter output even if a start command has not been issued. This
voltage must be isolated by means of a disconnector (open isolating distance, e.g. with an
open switch disconnector) whenever work is carried out on the feeder.
Soft starters in standard circuits
The SIRIUS 3RW44 soft starter is connected into the motor feeder between the disconnector
or motor starter protector and the motor.
The 3RW44 soft starter automatically detects the type of connection of the soft starter,
meaning that this does not have to be explicitly set on the device. The detected connection
type can be read on the starter in the "Status display/Type of connection" menu item. In this
case, the display reads "Star/delta". If the circuitry is faulty or the motor is not connected, the
display shows "Unknown".
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