Candy PVI 7500 Especificações descarregar pdf (Página 8)

InstallationandOperationManual(REVH) PVI6500/PVI7500

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8

TheconceptofstringingPVmodules

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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

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primarilyreflectedinahigherefficiencyoftheinverterandlowerwiringcost.

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Dataacquisition,displayandcommunication

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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.

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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.

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TechnicalstructureofthePVI6500andPVI7500

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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.

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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.

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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.

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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temperatu res 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.

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Theheatsinkconductsawayheatgeneratedfromenergylossesinthepowerelectronics.Internaltemperatureregulatio nprovides

protection against excessively high temperatures inside the PVI 6500‐7500.Should the inverter reach its maximum rated

temperature,thepowerproducedis au tomatically

reducedtopreventexcessive invertertemperature.

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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gener ato r 

onth a t line.

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Powergridfaultstha t 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th ese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in ver terwillis ola teitselffromth epowergri difthesepermittedli mi tsareexceeded.

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