Siemens SIRIUS 3RW55 - Asymmetry

Parameters Description
Pump cleaning - time During the cleaning time, the pump runs at reduced speed and the maximum
possible torque.
• Factory setting: 20 s
• Setting range: 1 ... 30 s
• In steps of: 1 s
Pump cleaning - cycles During a cycle, the pump rotation changes direction several times.
For parameter values "Pump cleaning - cycles" > 1, the following applies: After
completion of the cycle ⑧, the cleaning operation ③ is repeated until the set
number of cycles is reached. The "Starting" ⑨ mode is then normally contin‐
ued.
• Factory setting: 3
• Setting range: 1 ... 10
• In steps of: 1
Pump cleaning - start/stop parameters You can select the parameters for starting and stopping the pump for di󹪜erent
cleaning processes here. For example, you can make di󹪜erent settings for
starting and stopping in parameter set 2 than for the normal starting and
stopping procedure.
Parameter set 1
The pump cleaning function is carried out with the starting and stopping pa‐
rameters of parameter set 1.
Parameter set 2
The pump cleaning function is carried out with the starting and stopping pa‐
rameters of parameter set 2.
Parameter set 3
The pump cleaning function is carried out with the starting and stopping pa‐
rameters of parameter set 3.
Operating parameters (factory setting)
The pump cleaning function is carried out with the starting and stopping pa‐
rameters of the currently selected parameter set.
8.9 Asymmetry
Operating principle
In certain phases of the motor, an asymmetrical current consumption can cause a reduction in
power or damage to the motor. Possible causes for this are a di󹪜erent line or phase voltage or an
already damaged motor winding. The asymmetry monitoring monitors the 3 phase currents and
issues a warning or switches the motor o󹪜 at parameterizable limits. The current asymmetry can
be displayed via the measured value "Asymmetry" (Page 227)
Functions
8.9 Asymmetry
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
186 Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006