Beijer-electronics BFI-P2 V1.21 Bedienungsanleitung PDF herunterladen (Seite 20)

UserGuideRevision1.12

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4.1.2. GroundingGuidelines

ThegroundterminalofeachDriveshouldbeindividuallyconnectedDIRECTLYtothesitegroundbusbar(throughthefilterifinstalled).Drive

groundconnectionsshouldnotloopfromonedrivetoanother,orto,orfromanyotherequipment.Groundloopimpedancemustconfirmto

localindustrialsafetyregulations.TomeetULregulations,ULapprovedringcrimpterminalsshouldbeusedforallgroundwiringconnections.

ThedriveSafetyGroundmustbeconnectedtosystemground.Groundimpedancemustconformtotherequirementsofnationalandlocal

industrialsafetyregulationsand/orelectricalcodes.Theintegrityofallgroundconnectionsshouldbecheckedperiodically.

4.1.3. ProtectiveEarthConductor

TheCrosssectionalareaofthePEConductormustbeatleastequaltothatoftheincomingsupplyconductor.

4.1.4. SafetyGround 

Thisisthesafetygroundforthedrivethatisrequiredbycode.Oneofthesepointsmustbeconnectedtoadjacentbuildingsteel(girder,joist),a

floorgroundrod,orbusbar.Groundingpointsmustcomplywithnationalandlocalindustrialsafetyregulationsand/orelectricalcodes.

4.1.5. MotorGround

Themotorgroundmustbeconnectedtooneofthegroundterminalsonthedrive.

4.1.6. GroundFaultMonitoring

Aswithallinverters,aleakagecurrenttoearthcanexist.TheDriveisdesignedtoproducetheminimumpossibleleakagecurrentwhilst

complyingwithworldwidestandards.Thelevelofcurrentisaffectedbymotorcablelengthandtype,theeffectiveswitchingfrequency,the

earthconnectionsusedandthetypeof

RFIfilterinstalled.IfanELCB(EarthLeakageCircuitBreaker)istobeused,thefollowingconditionsapply:

‐

• ATypeBDevicemustbeused

• ThedevicemustbesuitableforprotectingequipmentwithaDCcomponentintheleakagecurrent

• IndividualELCBsshouldbeusedfor

eachDrive

4.1.7. ShieldTermination(CableScreen)

Thesafetygroundterminalprovidesagroundingpointforthemotorcableshield.Themotorcableshieldconnectedtothisterminal(driveend)

shouldalsobeconnectedtothemotorframe(motorend).UseashieldterminatingorEMIclamptoconnecttheshieldtothesafetyground

terminal.

4.2. WiringPrecautions

ConnecttheDriveaccordingtosection4.3,ensuringthatmotorterminalboxconnectionsarecorrect.Therearetwoconnectionsingeneral:Star

andDelta.Itisessentialtoensurethatthemotorisconnectedinaccordancewiththevoltageatwhichitwillbeop erated.Formoreinformation,

refertosection

4.6MotorTerminalBoxConnections.



Itisrecommendedthatthepowercablingshouldbe4‐corePVC‐insulatedscreenedcable,laidinaccordancewithlocalindustrialregulationsand

codesofpractice.

4.3. IncomingPowerConnection

• For1phasesupply,powershouldbeconnectedtoL1/L,L2/N.

• For3phasesupplies,powershouldbeconnectedtoL1,L2,andL3.Phasesequenceisnotimportant.

• ForcompliancewithCEandCTickEMCrequirements,asymmetricalshieldedcableisrecommended.

• Afixedinstallation

isrequiredaccordingtoIEC61800‐5‐1withasuitabledisconnectingdeviceinstalledbetweentheDriveandtheAC

PowerSource.Thedisconnectingdevicemustconformtothelocalsafetycode/regulations(e.g.withinEurope,EN60204‐1,Safetyof

machinery).

• Thecablesshouldbedimensionsaccordingtoany

localcodesorregulations.Guidelinedimensionsaregiveninsection10.2.

• Suitablefusestoprovidewiringprotectionoftheinputpowercableshouldbeinstalledintheincomingsupplyline,accordingtothe

datainsection10.2.Thefusesmustcomplywithanylocalcodesorregulationsinplace.In

general,typegG(IEC60269)orULtypeT

fusesaresuitable;howeverinsomecasestypeaRfusesmayberequired.Theoperatingtimeofthefusesmustbebelow0.5seconds.

• Whereallowedbylocalregulations,suitablydimensionedtypeBMCBcircuitbreakersofequivalentratingmay

beutilisedinplaceof

fuses,providingthattheclearingcapacityissufficientfortheinstallation.

• Whenthepowersupplyisremovedfromthedrive,aminimumof30secondsshouldbeallowedbeforere‐applyingthepower.A

minimumof5minutesshouldbeallowedbeforeremovingtheterminal

coversorconnection.

• ThemaximumpermissibleshortcircuitcurrentattheDrivePowerterminalsasdefinedinIEC60439‐1is100kA.

• AnoptionalInputChokeisrecommendedtobeinstalledinthesupplylinefordriveswhereanyofthefollowingconditionsoccur:‐

o Theincomingsupplyimpedance

isloworthefaultlevel/shortcircuitcurrentishigh

o Thesupplyispronetodipsorbrownouts

o Animbalanceexistsonthesupply(3phasedrives)

o Thepowersupplytothedriveisviaabusbarandbrushgearsystem(typicallyoverheadCranes).

• Inallotherinstallations,aninputchokeisrecommendedtoensureprotectionofthedriveagainstpowersupplyfaults.ContactBeijer

Electronicsforfurtherinformation.



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