Solectria Renewables PVI 6500 User manual

PVI6500
PVI7500
INSTALLATIONANDOPERATIONMANUAL
Residential/Commercial
Grid‐TiedPhotovoltaicInverter
©2012,SolectriaRenewables,LLC
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Allinformationsubjecttochangewithoutnotice
REVH
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
05/07/2012

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
2
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
IMPORTANTSAFETYINSTRUCTIONS

BeforeinstallingorusingthePVI6500‐7500,pleasereadallinstructionsandcautionmarkingsinthismanual
andonthePVI6500‐7500unitaswellasthePVmodules.

Allelectricalinstallationsshallbeperformedinaccordancewithalllocalandnationalelectricalcodes.The
PVI6500‐7500invertersarelistedtoUL1741/IEEE1547/CSA22.2#107.1(andcomplywithIEEE62.41).

ThePVI6500‐7500inverterscontainnouserserviceableparts.Donotopentheinverter.Pleasecontact
SolectriaRenewablesoraSolectriaRenewablesauthorizedsysteminstallerformaintenance.

ConnectionofthePVI6500‐7500totheelectricutilitygridmustbedoneafterreceivingpriorapprovalfrom
theutilitycompanyandperformedonlybyqualifiedpersonnel.

CompletelycoverthesurfaceofallPV‐arrayswithopaquematerialbeforewiringthemoruseothermethods
topreventshockhazard.PVarraysproduceelectricalenergywhenexposedtosunlightandcouldcreatea
hazardouscondition.

SAVETHESEINSTRUCTIONS

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

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IMPORTANTREGISTRATIONAND
WARRANTYINFORMATION

Forwarrantytobecomeactive,thisinverter
mustberegistered.Toactivatewarrantyand
registerinverter,pleasevisitthelinkbelow.

www.solren.com/registration

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InstallationandOperationManual(REVH) PVI6500/PVI7500
 
4

GeneralSafetyPrecautions
Trained,qualifiedpersonnelarerequiredtomount,reconfigureorrepairthisdevice.
Donotworkontheinverterwhenitisenergized.
Personnelmustremoveallconductivejewelrypriortoinstallationorserviceofthedevice,parts,
connectors,and/orwiring.
Useproperliftingtechniqueswheneverhandlingenclosure,equipmentorparts.
Anequipment‐groundingconductormustbeprovidedfortheinverterinaccordancewithlocalcodes
andregulations.
ADCgroundingconnectionmustbeprovidedfortheinverterinaccordancewithlocalelectricalcode.
Thenormallygroundedconductormaybeungroundedandenergizedwhenagroundfaultisindicated.
TheACNeutralconnectionisonlyforvoltagesensingandshallbeneitherusedtocarrycurrentsnor
bondedtogroundinsidetheinverterexceptinthecaseof277VACuse,wheretheneutraliscurrent‐
carrying.
Thislistdoesnotcontainallmeasurespertinenttothesafeoperationofthedevice.Ifspecialproblems
arisewhicharenotdescribedinsufficientdetailforthepurposesoftheuser,contactyourdistributor,
dealerorcalltheSolectriaRenewablescustomerservicehotline.

SAVETHESEINSTRUCTIONS


SafeInstallationandOperation
Installationofthedevicemustbeinaccordancewiththesafetyregulationsandallotherrelevant
nationalorlocalregulations.Correctgroundingandovercurrentprotectionmustbeprovidedto
ensureoperationalsafety.
Switchoffandlockoutthecircuitbreakersbeforeinstallationandwiring.Avoidstandinginwaterwhen
workingontheinverter.ConfirmabsenceofvoltagewithanACvoltmeter.
PVarrayswillbeenergizedwhenexposedtolight.Coverthearrayswithopaquematerialduring
installationandwiring.ConfirmabsenceofvoltagewithaDCvoltmeter.
Attachthecircuitpanelcovercorrectlybeforeswitchingonthecircuitbreakers.
Donotinstalltheinverterindirectsunlight.
Whennoexternalvoltageispresent,theinvertercanstillholdhighDCvoltagesandanelectricalshock
hazardmaystillbepresent.
Allowatleast5minutesfortheinvertertodischargecompletelyafterdisconnectingtheACandDC
sourcesfromtheinverter.VerifyabsenceofvoltagewithaDCvoltmeter.
Externalheatsinkscanreachhighenoughtemperaturesinnormaloperationtocauseskinburninjury
whenthesepartsaretouched.
Topreventtheriskoffirehazard,donotcoverorobstructtheheatsink.
Allowchangesinyourelectricalsystemtobecarriedoutonlybyqualifiedelectricians.


InstallationandOperationManual(REVH) PVI6500/PVI7500
 
5
!

RepairandMaintenance
Theinvertercontainsnouserserviceableparts.OnlySolectriaRenewablespersonnelareauthorizedtocarryout
internalrepairandmaintenanceoftheunit.Pleasereturnthedeviceforrepairandmaintenance.For
maintenanceandreplacementofthefusesbyqualifiedpersonnel,pleaserefertosection5.3.

WARNING!
Donotmakealterationsortamperwithcomponentsintheinverterwithoutthemanufacturer’sauthorization
unlessspecifiedelsewhereinthismanual.Theymayresultininjury,electricshock,orfireandvoidthewarranty.

Wiringtheinverter
Input/OutputTerminals:Use90°C(194°F),#10AWGto#6AWGcopperwireforDCconnectionsand#10AWGto#6AWG
copperwireforACconnections.Useonlysolidorstrandedwirebutnotfine‐strandedwire.
Reconfirmthatallconnectionshavebeenperformedproperlyandallscrewsareproperlytightenedandtorqued.

WARNING!
Allelectricalinstallationsandtheassociatedwiringshallbedoneinaccordancewiththelocalandnational
electricalcodesandshouldfollowtheimportantsafetyinstructionsinthismanual.
WARNING!
MakesurethatyouusesuitableconnectingconductorsforboththeACandDCwiring.Theconductorsmustbe
adequatelysizedandsuitablyspecifiedfortemperatureextremes,UVradiationandotherpossiblehazards.

ConnectionoftheACconductors
WARNING!
Reconfirmthatthecircuitbreakertotheutility/breakerpanelisswitchedOFFandlockedoutbeforeconnecting
theconductorsfromthebreakertotheACterminalblocks.

ConnectionoftheDCconductors
CAUTION!
IdentifythepolarityofDCvoltageoneachPVstringandconnectrespectivelytotheinputterminalsmarked
“UNGROUNDEDCONDUCTOR”and“GROUNDEDCONDUCTOR”.MakesuretheDCvoltagegeneratedbythePV
arrayisequalorlessthan600VDCfactoringinopencircuitextremecoldtemperature.

WARNING!
ProtecttheDCconductorstotheinverterfromallpossiblehazardsthatcoulddamagethewires.

WARNING!
HazardousvoltageisstillpresentonthedeviceafterdisconnectionofallPVDCinputs.Allow5minutesforthe
invertertodischargethestoredenergycompletely.VerifyabsenceofvoltagewithaDCvoltmeter.

WARNING!
PVarrayswillbeenergizedwhenexposedtolight.Coverthearrayswithopaquematerialsduringinstallationand
wiring.

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
6

TableofContents

1Introduction......................................................................................................................................... 7
2Installation........................................................................................................................................... 10
2.1CheckingforShippingDamage..................................................................................................... 10
2.2InverterMountingandPlacement................................................................................................ 10
2.3ElectricalConnectionandConnectiontoElectricalUtilityGrid,
Surge/LightningArrestorsandGroundingElectrodeConductors.................................................... 18
2.4ConnectionofACWiring.............................................................................................................. 24
 2.5ConnectionofDCWiring.............................................................................................................. 27
2.6ConnectionofCommunicationWiring.......................................................................................... 31
2.4CommunicationIDadjustment..................................................................................................... 33
3CommissioningtheInverterandPVSystem......................................................................................... 35
4Power,GroundFault,ErrorLEDIndicatorsandLCDDisplay................................................................. 37
4.1Power,GroundFaultandErrorLEDIndicators............................................................................. 37
4.2TheLCDDisplay............................................................................................................................ 39
5TroubleShooting.................................................................................................................................. 48
5.1Diagnosisandanalyzingdata........................................................................................................ 48
5.2ExplanationsofErrorMessages.................................................................................................... 48
5.3Maintenance................................................................................................................................ 51
5.4FactoryService............................................................................................................................. 53
5.5InverterReplacement................................................................................................................... 53
6ProductWarranty&RMAPolicy.......................................................................................................... 62
6.1WarrantyPolicy............................................................................................................................ 62
6.2ReturnMaterialAuthorizationPolicy............................................................................................ 65
7TechnicalData...................................................................................................................................... 66
7.1TechnicalInformationandspecifications...................................................................................... 66

Appendices.......................................................................................................................................... 71
AppendixA:Brochure/Datasheet...................................................................................................... 71
AppendixB:ExamplePVStringSizingTables....................................................................................... 71
AppendixC:ContactInformation&AuthorizedDealersandInstallers................................................ 71
AppendixD:PositiveGroundingOption.............................................................................................. 71
AppendixE:FaultRepotForm............................................................................................................. 74
AppendixF:UL1741/IEEE1547ListingLetter……………………………………………………………………………………..75

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
7
1Introduction

ThePVI6500andPVI7500aresinglephase,grid‐tiedPVinvertersdesignedtobeinterconnectedtotheelectricutilitygrid.By
followingtheinstructionsinthismanual,thePVI6500‐PVI7500canbeinstalledandoperatedsafely.Thisinstallationguideis
tobeusedasreferenceforcommissioningandasaguidelineonhowtousetheinvertermosteffectively.

FeedingpowerontothegridinvolvesconversionoftheDC‐voltagefromthePV‐arraytogridcompatibleAC‐voltageby
“inverting”DCtoAC.Thisunitfeedspowerintoastandard240VACsplitphaseelectricalsystemortwophasesofa208VAC,3‐
phasecommercial,industrialorinstitutionalfacility’selectricalsystemthatisconnectedtotheelectricutilitygrid.Theinverter
canalsobeconnectedtoonephaseandneutralofa277VACelectricalservice.

IfthePVsystemandinverterareprovidingthesameamountofelectricalpowerthatthefacilityisusing,nopoweristakenfrom
orfedontotheutilitygrid.IfthefacilityisusingmorepowerthanthePVsystemisproviding,thentheutilitygridprovidesthe
balanceofpower.IfthefacilityisusinglesspowerthanthePVsystemisgenerating,theexcessisfedintotheutilitygrid.

Besuretolookintolocalregulationsregardingnetmeteringandinterconnectioninyourlocalarea.Notethatsomeutilities
needtochangetheirrevenuekWhmetertoabi‐directionaltypeforpropernetmeteringmeasurementorincentives/billing.


Fig.1.1Grid‐tiedinverterapplication




Photovoltaic
Array
PVI6500‐7500
Inverter
ElectricUtility
Grid

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
8
TheconceptofstringingPVmodules

TheuseofaPVstringsignificantlyreducesthecablingcostsonaphotovoltaicsystem.TheuseofstringsofseveralPVmodules
inseriesandmultipleparallelstringsofPVmodulesisdeliveringahighoperatingvoltagetothesolarinverter.Thisadvantageis
primarilyreflectedinahigherefficiencyoftheinverterandlowerwiringcost.

Dataacquisition,displayandcommunication

TheintegrateddataacquisitionandcommunicationcapabilityofthePVI6500‐7500allowscomprehensivetrackingofsystem
performancedata.AllerrormessagesandoperatingconditionsofthePVI6500‐7500,aswellasthoseonthePVsystemare
shownonthedisplay.

Anoptionalfull‐featured,inverterdirectdataacquisitionandlogginggatewayandweb‐basedserviceisavailablefromSolectria
Renewables,calledSolrenView(http://www.solrenview.com).Thegatewayallowstheinvertertodeliverinformationtothe
Solrenviewserverthroughthefacility’sinternetservice.

TechnicalstructureofthePVI6500andPVI7500

Ahighfrequencyswitchingbridgecircuitoperatinginconjunctionwithahighfrequencytransformerprovidesgalvanicisolation
ofthephotovoltaicsystemfromthebuilding’sACpowerandelectricalutilitygrid.TheMaximumPowerPointtrackingalgorithm
continuouslycontrolsthePVvoltageandcurrenttoproducethemaximumpossiblepoweroutputduringvaryingsunlight
strengthsandPVmodule.

Theinverter’sDCinputvoltagewindowisdesignedtocoveraPVarrayvoltagerangeof230to550VDC.(600VDCmaximum
opencircuitvoltage).Thisallowsmanymodulesfromdifferentmanufacturerstobeused.

Theinverterconsumesnearlyzerostandbypoweratnight.Thedaytimecontrolcircuitpoweruseoftheinverterisminimal,
resultinginaveryhighinverterefficiency.

ThehousingandheatsinkforthePVI6500‐7500ismanufacturedusingaheavyaluminiumextrusionwithananti‐corrosionfinish.
ThehousingisdesignedtomeettheNEMA3standardandisresistanttorainandsnowfall.Theheatsinkandfanperformanceallow
operationoftheinverteratambienttemperaturesof‐13°F(–25°C)to+131°F(+55°C)forPVI6500and‐13°F(–25°C)to+122°F
(+50°C)forPVI7500atfullratedpower.

Theheatsinkconductsawayheatgeneratedfromenergylossesinthepowerelectronics.Internaltemperatureregulationprovides
protectionagainstexcessivelyhightemperaturesinsidethePVI6500‐7500.Shouldtheinverterreachitsmaximumrated
temperature,thepowerproducedisautomaticallyreducedtopreventexcessiveinvertertemperature.

ThePVI6500‐7500willonlyoperateinparallelwiththeutilitygrid.ACgridmonitoringisperformedbymicrocontrollersconfigured
tomeettherequirementsofUL1741/IEEE1547/CSA22.2#107.1,whichincludedisconnectionfromthegridduringabnormal
frequencyorvoltageevents.Ifthishappens,theinverterwillmonitorthegridandreconnecttoit5minutesafterthegridhascome
backtonormal.Disconnectionfromthegridisimportanttoprotecttheelectricalandutilitylineworkerswhomaybeworkingto
restorethegridandnotbeawareofthepresenceaPVgeneratoronthatline.

PowergridfaultsthatwillcausethePVI6500‐7500toisolateitselffromthepowergrid:
ACgridvoltage
Thegridvoltagemustnotgooutsidetherangeof+10/‐12%ofthenominal240,208Vor277VACgridvoltage,perIEEEStd
1547,§4.2.3(US).Theinverterwillisolateitselffromthegridiftheselimitsareexceeded.Theinverterwillautomaticallydetect
andsynchronizeto240,208or277VACwhentheneutralisconnectedtotheinverter.Ifitisdesiredtoconnectto208,240VAC
withoutaneutralconnection,thentheselectionmustbeseteitheratthefactoryorcanbeadjustedinthefieldbyaqualified
installer.Itisnotpossibletooperateat277VACwithoutaneutralconnectionbecausetheneutralispartofthecurrent‐carrying
circuit.
ACgridfrequency
Thepowergridfrequencymustnotgooutsideoftherangeof+0.5Hzand‐0.7Hzofthenominal60Hzgridfrequency,perIEEE
Std1547,§4.2.4(US).Theinverterwillisolateitselffromthepowergridifthesepermittedlimitsareexceeded.

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
9
AnotherimportantsafetyfeaturethathastheabilitytoisolatetheinverterfromthegridistheDCgroundfaultdetectionand
interrupt(GFDI)circuit.ThePVarray’sgroundedconductorisbondedtogroundinsidetheinverterthroughtheGFDIfuse(andmust
notbebondedtogroundatanyotherpointoutsideoftheinverter).

PVI6500‐7500Description


Fig.1.2PVI6500/7500FeaturesDiagram
(1)ACknockouts
(2) PVarraygroundfaultinterrupt(GFDI)fuse(insidewiringbox)
(3) CombinedDC/ACdisconnectswitch
(4) DCknockouts
(5) Heatsink
(6) RS‐485interfaces
(7) LCDdisplay
(8) LEDindicatorsofbasicoperatingstatus
(9) InverterSerialNumber
(10)Detachablewiringbox
(11)Quick‐mountwallplate(behindunit)
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9
8
7
6
1
4
3
5
10
11
2(inside)

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
10
2Installation

WARNING:BeforeinstallingthePVI6500‐7500,readallinstructionsandcautionmarkingsinthismanualandon
thePVI6500‐7500aswellasthosewrittenonthephotovoltaicmodules.


WARNING:Electricalinstallationshallbeperformedinaccordancewithalllocalandnationalelectricalcodes.


WARNING:ConnectingthePVI6500‐7500totheelectricutilitygridmustonlybeperformedafterreceivingprior
approvalfromtheutilitycompanyandinstallationcompletedonlybyqualifiedpersonnel/licensedelectrician(s).

2.1CheckingforShippingDamage

ThePVI6500/7500invertersarethoroughlyinspectedandtestedrigorouslybeforetheyareshipped.Eventhoughtheyare
deliveredinarugged,heavycardboardboxwithfoaminserts,theinverterscanbedamagedinshipping.

Pleaseinspecttheinverterthoroughlyupondelivery.Ifanydamageisdiscoveredpleasenotifytheshippingcompany
immediately.Ifthereisanyquestionaboutpotentialshippingdamage,contactSolectriaRenewables.Aphotoofthedamage
maybehelpful.SolectriaRenewablesisnotresponsibleforshippingdamage.Aclaimmustbefiledwiththeshippingcompany.
SolectriaRenewableswillassistyouwiththisprocessasneeded.

Donotaccepttheunitifitisvisiblydamagedorifyounotevisibledamagewhensigningshippingcompanyreceipt.Donot
removetheunitfrompackaging.Ifitisdeterminedthattheunitmustbereturned,anRMAnumbermustbeobtainedfrom
SolectriaRenewables.

2.2InverterMounting

ThePVI6500/7500inverteriscomprisedofasealedNEMA3corrosionresistant,paintedaluminumenclosurecontainingall
electricalandelectroniccomponents.

NOTE:IfthePVI6500/7500ismountedoutside,duringtheinstallationprocessandincaseofrain,donotopen
theinverter.


Notesregardingmountingandplacementoftheinverter

Criteriaforinvertermounting:

BecausetheinverterisinaNEMA3enclosure,theinvertercanbemountedoutdoors.

Thelongestinverterlifecanbeachievedbymountingitinaclean,dryandcoollocation.Itisrecommendedtokeepthe
unitoutofdirectrainorsnow.Protectionbyaroofoverhangorcoveringisrecommendedifoutdoormountingis
necessary.

Foroptimalelectricalefficiency,usetheshortestpossibleACandDCwiresandusethemaximumallowablewiresize.

Avoidinstallationincloseproximitytopeopleoranimals,asthereisasmallamountofhigh‐frequencyaudibleswitching
noiseemitted.

Installtheinverterinanaccessiblelocationfollowinglocalcodes.Notethatcoderequirementsforclearancesandproximity
tootherequipmentandbuildingwallsapply.

InstallationateyelevelallowseasyreadingoftheindicatorLEDsandtheLCDdisplay.

Foroptimalinverterlifeandperformance,donotmounttheinverterindirectsunlight,especiallyinhotclimates.Iftheunit
mustbemountedindirectsunlight,asilverorwhitemetalsun‐shieldishighlyrecommended.Itisfurtherrecommended

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
11
thattheinverterbemountedonthenorthoreastsideofbuildingsoronthenorthernsideofagroundmountedPVarray.
Followingtheseguidelineshelppreventtheunitfromlimitingthepowerproducedduetoanexcessivelyhighinverter
temperature.

Inhotclimates,thehousingandheatsinkcanreach160oF(70oC)andmustbemountedonanappropriatematerialforthis
temperatureaswellasonethatmeetslocalcodes.Theinvertershouldnotbemountedwherepeoplearelikelytotouch
thecaseorheatsinkduetothehighpotentialtemperature.


CAUTION:Pleasefollowtheseguidelines:


Theinverterweighsapproximately89lbs(40.8kg)(shippingweightintheboxwithmountingplateisapproximately104lb).
Besuretouseamountingmethodthatwillsafelyholdthisweight.

TheambienttemperatureforthePVI6500mustbebetween–13oF(–25oC)and+131oF(+55oC)forcontinuous,fullpower
operation.ForthePVI7500themaximumallowableambienttemperatureis+122oF(+50oC).Theinverterwill
automaticallyreducepowerorshutdowntoprotectitselfiftheambientairtemperaturerisesabove131oF(55oC)/122oF
(50oC).Relativehumidityshallbewithin0%and95%.

LocalandnationalelectricalcodesrequirethattheinverterbeconnectedtoadedicatedACcircuit.Thecodealsoimposes
limitationsonthesizeoftheinverterandthemannerinwithitisconnectedtotheutilitygrid.Seelocalcodesformore
information.

Thecoolingairentersatthebottomoftheheatsinkandexhaustsatthetopoftheunit.SeeFigure2.1.1forrecommended
clearancesforcoolingairandspacearoundtheinverter.

Ifyouareinstallingtheinverterinautilityvaultorelectricalcloset,theaircirculationmustbesufficientforheatdissipation
–provideexternalventilation,tomaintainanambientconditionoflessthan131oF(55oC)/122oF(50oC)forthePVI6500
andPVI7500.Theambienttemperatureshouldbekeptaslowaspossible.

UsethedimensionaldiagramsinFig.2.2.1and2.2.2,forcorrectmountingoftheinverter.



















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

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
12
Fig.2.2.1PVI6500/7500DimensionalDiagram

Placementandlocation
 WARNING!
Somepartsoftheheatsinkcanreachtemperaturesover160F(70℃).Keepflammable,explosivematerialsor
trashatanappropriatedistancefromtheinverter!

 WARNING!
Donotexposetheinvertertocorrosiveliquidsand/orgasses.


∙ Themountingbracketshouldbefastenedtoaconcreteoramasonrywallusingappropriateanchors.

ConduitLocations,Pre‐punchedHolesandKnock‐outs

∙ MultipleconcentricKnock‐outs(KOs)areonthebottom,backandsideoftheACandDCendsofthewiringbox.
∙ LargeKnockOutsarefor1”‐½”conduit.SmallKnockoutsarefor¾”‐½”conduit.
∙ConcentricKOsareonthebackoftheACandDCsidesofthewiringboxfora“hiddenwiring”installation.




InstallationandOperationManual(REVH) PVI6500/PVI7500
 
13
Fig2.2.2ClearancesrecommendedforPVI6500/7500inverterinstallation

Mountingdetails
Thestepslistedbelowdescribehowtomounttheinverteronthewall:
‐ Aftertakingtheinverteroutofthecardboardbox,youwillfindthebracketinthebagbehindtheheatsink.Thebracket
needstobepickedupfromtheinverterasshowninthefigure2.2.3below.
Fig2.2.3Unpackingthemountingbracket

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
14
98.43
Fig2.2.4Removethebracketfromtheinverter

1. Usethebracket(Fig2.2.5)asatemplatetomarktheholelocationsonthewall.Afterdrillingtheholes,themounting
bracketshouldbefastenedtothewallwithscrewsorscrew‐anchorsasshowninFigure2.2.6.
405mm
525mm
44mm
70mm
125mm
180mm
250mm
70mm
120mm
190mm
2.75
7.5”
4.94”
7.12”
2.75”
4.75”
2.91”
20.67”
9.88”
16.94”

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
15
Fig2.2.5Mountingbracketanditsdimensions

Fig2.2.6.Fasteningthemountingbracket


2. Oncethemountingbracketisfastenedtothewall,theinverterandthewiringboxcanbehookedontothebracketand
slippeddownintoplace.Makesurethelowerliponthebrackethooksintothewindowonthebackoftheinverteras
showninFig.2.2.7.
100~170cm
30cm
60cm
30cm
11.8”
23.6”
11.8”
58”‐67”
¼”diametermountingscrewrecommendedor
3/16‐1/4”anchorbolt

Inst
a
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a
llationandOperation
M
F
m
M
anual(REV
F
F
lange with
m
ounting hol
e
H)
F
ig2.2.7
M
e
s
16

M
ountingIn
v
v
erteronb
r
r
acket
PVI650
0
0
/PVI7500

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
17
Fig2.2.8Fastentheinverterwithscrewsatthebottomflange

Aftertheinverterishookedproperlyonthebracket,secureitwithscrewsatthebottomflange.

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
18
2.3 ElectricalConnectionandConnectiontotheGrid
* Colors used in wiring diagram are to differentiate conductors and are not representative of wire colors used pre code.
    Fig2.3.2BasicConnections

WARNING:Allelectricalinstallationsshallbeperformedinaccordancewithlocalandnationalelectricalcodes.


PVI6500‐7500PVSYSTEMBLOCKDIAGRAM
Fig.2.3.1 Simplifiedelectricalconnectiondiagram
* Equipment grounds, grounding electrode conductor
and ground fault detector/interrupter not shown

InstallationandOperationManual(REVH) PVI6500/PVI7500
 
19
ThegroundedDCphotovoltaicconnectionisbondedtogroundwithintheinverterthroughthegroundfaultdetectionand
interruptcircuit(GFDI)andshouldnotbebondedatanyotherpointinthesystem.TheungroundedDCconnectionmustnever
begroundedatanytime.

ACandDC(PV)Connections:
ThePVI6500‐7500invertersareequippedwithcoveredholesandKOsforconduitfittingsthatarecode‐compliantforusewith
severalsizesofrigidandflexiblemetallicornon‐metallicconduit.Allconduitandwiringinstallationisdoneinthewiringbox.
Thisdesignallowsinstallationandwiringoftheinvertertobedonewithoutopeningthemaininverterenclosurewhichmust
neverbeopened.AC&DCterminalsallowfor#10to#6AWGcopperconductors.

LightningandSurgeProtection:
TheinverterisdesignedwithcertainprotectionsagainstvoltagesurgeswithcertificationtoUL1741/IEEE1547and
CSA22.2#107.1(includingANSI/IEEE62.41/62.42).Inareasoffrequentlightningstormsorwhennoprimarylightningprotection
systemisused(airterminals),additionalsurgeprotectiononDCandACsideandsolidgroundingprovisionsareimportantfor
bestprotectionagainstutilityvoltagetransientsandsurgescreatedbyindirectlightningstrikes.

TheinstallationofalightningarresterorotherULlistedsurgearresterofthecorrectspecificationisrecommendedonboththe
DCandACsidesofinverter.Theycanbeinstalledontheoutsideofthewiringboxorotherlocationsinthesystemandwired
usingthemanufacturer'sdirections.WhencoordinatedwiththeSurgeProtectionDevice,lightningarrestorsgiveimportant
addedprotectionfromdirectlightningstrikesandresultingsurges.Makesuretocheckthelightningprotectionsystemofthe
buildingandperformanynecessaryupgradebeforethePVsystemisinstalled.Asolidlightningprotectionschemeisespecially
importantforareaspronetothunderstormsandpossiblenearbylightningstrikes.Althoughtheseaddedprecautionswillnot
guaranteethattherewillbenodamagefromlightning,theycanhelppreventorlimitpotentialdamage.

GroundingElectrodeConductor:
AswithallPVsystems,aGroundingElectrodeConductormustbeinstalledpercode.Thisconductorshouldbesizedaccording
tothesecoderequirements.Thisconductorshouldbeterminatedonthelabeledgroundpointlocatedatthebottomofthe
wiringboxwheretheDCandACequipmentgroundconductorsalsoareterminated.

ACVoltage:

ThePVI6500‐7500invertersare240VACgridconnecteddevices.Theyarealsosuitablefor208Vand277VACgrid‐connected
use.Forexample,connectionbetweentwophasesofa208VAC,3‐phaseserviceorconnectionbetweenonephaseandneutral
ofa277VACservice(whereacceptablebycode).Nounit(PVI6500or7500)canbeusedwitha120VACservice.Theunitsare
factorypre‐settoauto‐detect277VAC,240VACor208VACwhenconnectedwithaneutral.Theycanalsobeconfiguredfor
either240or208VACwithoutaneutralatthefactoryorbyaqualifiedinstaller.Usewith277VACmustalwaysuseaneutralas
theneutralisusedasacurrentcarryingconductor.


WARNING:TheinvertershouldnotbeopenedatanytimeunlessauthorizedbySolectria.Theunitissealedat
thefactoryanditsULlistingwillnolongerbevalidandthewarrantywillbevoidifopenedortamperedwithin
anyway.


MultipleUnits:

MultiplePVI6500‐7500unitscanbeusedatthesamelocationaslongasallelectricalcodes,localbuildingcodesandareautility
guidelinesarefollowed.Ifmultipleunitsareused,eachinvertermusthaveitsowndedicatedACovercurrentprotectiondevice,
andPVstringscannotbewiredtomultipleinverters.
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InstallationandOperationManual(REVH) PVI6500/PVI7500
 
20
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ACOverCurrentProtectionDevice:

AdedicatedACovercurrentprotectiondeviceisrequiredforeachPVinverter.EveryPVIrequiresa208V,240Vor277VAC
rated2–poleovercurrentprotectiondevice.Thefollowingisatableshowingtheappropriateovercurrentprotectiondevice
ratingforthePVI6500and7500atdifferentservicevoltages.

ACVoltage PVI6500 PVI7500
208VAC 40A 50A
240VAC 35A 40A
277VAC 30A 35A

ACandDCDisconnects:

TheintegralAC&DCdisconnectsarestandardfeaturesofthePVI6500‐7500inverters.ThePVsystemmayneedadditionalAC
orDCdisconnectifrequiredbytheutilityorlocalcode.

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ConnectingtheACInverterWiring:
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WARNING:ThewiringofthePVinverter’sACandDCconnectionsmustonlybedonewiththebuildingACcircuit
breakeroffandlockedoutandthePVarraydisconnectedorcoveredwithanopaquematerial(orothermethod
thatestablisheselectricallysafeworkingconditions).BothACandDCshouldbedisconnectedorturnedoff.
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ThePVI6500‐7500invertersarenotcapableoffeedingcurrentsbackintothePVarrayfromtheACsourceincludingintoshort
circuit(s)orfault(s)inthePVarrayorstring(s).
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ConnectingtheInverterWiring:
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WARNING:FollowPVmodulemanufacturer’sinstallationdirections.PVarraysproduceelectricalenergywhen
exposedtolightandcouldcreateahazardouscondition.Disconnectarrayconductorswhenwiringtheinverter
orcoverthearraywithanopaquematerialpriortowiring.
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WARNING:BeforeconnectingtheconnectorsofthePVmoduletotheDCinverterterminals,checkthecorrect
polarityandadmissiblePVmodulevoltagebetweenthe(+)andthe(‐)wireconnectorsofthePVmodule.
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ThePVmoduleopencircuitvoltagemustbebelow600VDC(Vpv<600VDC)underalltemperatureconditionsper
code.
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WARNING:Evenwhenintheoffposition,thefusedPVcombinerandtheDCdisconnectterminalswillremain
liveonthePVsidewhenthePVmodulesareindaylight.
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Wiringtheinverter
Thecoverofthewiringboxneedstoberemovedbeforewiringtheinverter.FirsttheDC/ACdisconnectswitchshallbe
turnedtotheOFFpositionasshownintheFigure2.3.3.Removethe4screws,andthenthecoverofthewiringboxshownin
thefigure2.3.3and2.3.4.