Siemens 3RW44 Manual page 62

Commissioning
6.4 Making settings in the selected parameter set
Rated operational current I
Note
Always set the rated operating current of the motor stated on the motor nameplate based on
the prevailing line voltage. This setting is independent of the type of connection of the soft
starter (soft starter in standard or inside-delta circuit). Value to be set in the above example
for a line voltage of 400 V, e.g. 40.5 A.
The motor current of the connected drive should be set to ensure proper functioning of the
soft starter during starting and stopping, as well as with regard to motor protection.
Rated torque
If the motor's rated torque is not indicated on the nameplate, it can be calculated using the
following formula:
Example
If no value is specified, the value of the basic factory setting is active (0 Nm).
When the start command is given and the motor is connected, the soft starter automatically
calculates the required value once.
Note
If a motor with rated data (current, speed, torque) that differs from the values already entered
is connected to the soft starter (e.g. for testing purposes), this rated data must be adapted to
the new motor. If 0 Nm is entered as the rated torque, the value is automatically calculated
once by the soft starter.
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Manual, 03/2017, NEB535219502000/RS-AB/008
3RW44 soft starters