Beijer-electronics BFI-P2 V1.21 Manuel d'utilisateur télécharger pdf (Page 21)

UserGuideRevision1.121

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www.beijerelectronics.com

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4.4. Operationof3PhasedrivesfromaSinglePhaseSupply

AspecialfunctionofDriveallowsalldrivesdesignedforoperationon3phasesuppliestobeoperatedonasinglephasesupplyofthecorrect

ratedvoltageatupto50%ofthenominalcapacity.

ForExample,ModelNumberODP‐2‐64450‐3KA4Ncanbeoperatedonasinglephasesupply,380–480volts,withthemaximumoutputcurrent

limitedto45Amps

ThesupplyshouldbeconnectedtotheL1andL2terminalsofthedrive.

4.5. DriveandMotorConnection

• Thedriveinherentlyproducesfastswitchingoftheoutputvoltage(PWM)tothemotorcomparedtothemainssupply,formotors

whichhavebeenwoundforoperationwithavariablespeeddrivethenthereisnopreventativemeasuresrequired,howeverifthe

qualityofinsulationisunknownthenthemotor

manufacturershouldbeconsultedandpreventativemeasuresmayberequired.

• ThemotorshouldbeconnectedtotheDriveU,V,andWterminalsusingasuitable3or4corecable.Wherea3corecableisutilised,

withtheshieldoperatingasanearthconductor,theshieldmust

haveacrosssectionalareaatleastequaltothephaseconductors

whentheyaremadefromthesamematerial.Wherea4corecableisutilised,theearthconductormustbeofatleastequalcross

sectionalareaandmanufacturedfromthesamematerialasthephaseconductors.

• The

motorearthmustbeconnectedtooneoftheDriveearthterminals.

• ForcompliancewiththeEuropeanEMCdirective,asuitablescreened(shielded)cableshouldbeused.Braidedortwistedtype

screenedcablewherethescreencoversatleast85%ofthecablesurfacearea,designedwithlowimpedance

toHFsignalsare

recommendedasaminimum.Installationwithinasuitablesteelorcoppertubeisgenerallyalsoacceptable.

• ThecablescreenshouldbeterminatedatthemotorendusinganEMCtypeglandallowingconnectiontothemotorbodythroughthe

largestpossiblesurfacearea

• Wheredrives

aremountedinasteelcontrolpanelenclosure,thecablescreenmaybeterminateddirectlytothecontrolpanelusinga

suitableEMCclamporgland,asclosetothedriveaspossible.

• ForIP55drives,connectthemotorcablescreentotheinternalgroundclamp

4.6. MotorTerminalBoxConnections

Mostgeneralpurposemotorsarewoundforoperationondualvoltagesupplies.Thisisindicatedonthenameplateofthemotor

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ThisoperationalvoltageisnormallyselectedwheninstallingthemotorbyselectingeitherSTARorDELTAconnection.STARalwaysgivesthe

higherofthetwovoltageratings.

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IncomingSupplyVoltage MotorNameplateVoltages Connection

230 230/400

Delta

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400 400/690

400 230/400 Star

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4.7. MotorThermistorConnection

4.7.1. InternalThermaloverloadprotection.

Thedrivehasanin‐builtmotorthermaloverloadfunction;thisisintheformof an“I.t‐trP”tripafterdelivering>100%ofthevaluesetinP1‐08

forasustainedperiodoftime(e.g.150%for60seconds).

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4.7.2. MotorThermistorConnection

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Whereamotorthermistoristobeused,itshouldbeconnectedasfollows:

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AdditionalInformation

• CompatibleThermistor:PTCType,2.5kΩtriplevel

• UseasettingofP1‐13thathasInput5functionasExternalTrip,e.g.P1‐13

=6.Refertosection7forfurtherdetails.

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