Siemens 3RW44 Manual page 95

NOTICE
In the case of heavy starting and set values of tripping class ≥ CLASS 20, we recommend
setting the "Prewarning limit tripping reserve" parameter value to 0 s (deactivated) and
increasing the "Prewarning limit motor heating" parameter to 95 %. Otherwise, a motor
protection warning will be issued when starting.
NOTICE
If a CLASS setting other than 5(10a) or 10 is selected, it may be necessary to check and
adjust the set values for the rated operating current I
motor data (Page 61)) in all 3 parameter sets, since otherwise the "Impermissible I
settings" error message may be issued.
For the maximum permissible set value for the rated operating current I
on the CLASS settings, refer to chapter Technical data of the power unit (Page 259).
NOTICE
Use of the 3RW44 to operate motors in hazardous areas:
The 3RW44 does not have ATEX certification. When an ATEX-certified overload relay is
used (e.g. 3RB2 from Siemens) that affects an additional switching element (e.g.
contactor), the 3RW44 can be installed in series with this overload relay, meaning that the
ATEX requirements are met.
NOTICE
The internal motor overload protection of the SIRIUS 3RW44 soft starter must be
deactivated for this kind of installation! (Set value in the "Motor protection/Tripping class"
menu item: "None" and Motor protection/Temperature sensor: "Deactivated")
3RW44 soft starters
Manual, 03/2017, NEB535219502000/RS-AB/008
6.4 Making settings in the selected parameter set
of the motor (chapter Entering the
e
Commissioning
/CLASS
e
of the motor based
e
95