SIRIUS Soft Starters - Siemens

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Configuration NotesSelection aid for soft startersApplication 3RW30 3RW40 3RW44Normal starting(CLASS 10)Heavy-dutystarting(CLASS 20)Ultra-heavydutystarting(CLASS 30)PumpPump with special pump stop (against water hammer)Heat pumpHydraulic pumpPressBelt conveyorRoller conveyorScrew conveyorEscalatorPiston compressorScrew compressorSmall fanCentrifugal blowerBow thrusterAgitatorExtruderTurning machineMilling machineLarge fanCircular saw/band sawCentrifugeMillCrusherSoft starter functionsSoft start functionSoft stop functionIntegrated intrinsic device protectionIntegrated electronic motor overload protectionSettable current limitingSpecial pump stop functionBrakes in ramp-downSettable breakaway torqueCommunication via PROFIBUS (optional)External operation and indication display (optional)Soft Starter ES parameterization softwareSpecial functions, e.g. measured values, display language, etc.recommended soft starterpossible soft starter14
Boundary conditionsCLASS 10 (normal starting):3RW30:Maximum start-up time 3 sec., with 300 % starting current, 20 starts/hour3RW40/44:Maximum start-up time 10 sec., current limiting 300 %, 5 starts/hourCLASS 20 (heavy-duty starting):3RW402., 3RW403., 3RW404.:Maximum start-up time 20 sec., current limiting set to 300 %, maximum 5 starts/hour3RW405., 3RW407., 3RW44:Maximum start-up time 40 sec., current limiting set to 350 %, maximum 1 start/hourCLASS 30 (ultra-heavy-duty starting):Maximum start-up time 60 sec., current limiting set to 350 %, maximum 1 start/hourGeneral boundary conditions:ON period 30 %Stand-alone assemblyInstallation altitude: maximum 1000 m/3280 ftAmbient temperature:kW: 40 °C / 104 °Fhp: 50 °C / 122 °FThe stated motor ratings are only approximate values. The soft starter’s dimensioning should always exceedthe motor current (rated operating current). With deviating conditions, a larger device may have to beselected.Motor rating data are based on DIN 42973 (kW) and NEC 96/UL508 (hp).Further details and information (e.g. on accessories and spare parts) can be found in the catalogs LV1 andLV1 T “Low-Voltage Controls and Distribution” and in the current online editions of these catalogs on theInternet at:www.siemens.com/industrial-controls/catalogsGeneral and further information on SIRIUS soft starters is available on the Internet at:www.siemens.com/sirius-soft-starterFor optimum dimensioning (in case of deviations from the described boundary conditions),we recommend application of the selection and simulation program„Win-Soft Starter“.Win-Soft Starter can be downloaded free of charge from:www.siemens.com/industrial-controls/demosoftwareAlternatively, contact ourTechnical Assistance: +49 911 895 5900or write an e-mail totechnical-assistance@siemens.com15
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SIRIUS Soft Starters - Siemens

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