Designation:E2047−10(Reapproved2015)StandardTestMethodforWetInsulationIntegrityTestingofPhotovoltaicArrays1ThisstandardisissuedunderthefixeddesignationE2047;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversaproceduretodeterminetheinsulationresistanceofaphotovoltaic(PV)array(oritscomponentstrings),thatis,theelectricalresistancebetweenthearray’sinternalelectricalcomponentsandisexposed,electricallyconductive,non-currentcarryingpartsandsurfacesofthearray.1.2Thistestmethoddoesnotestablishpassorfaillevels.Thedeterminationofacceptableorunacceptableresultsisbeyondthescopeofthistestmethod.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E772TerminologyofSolarEnergyConversionE1328TerminologyRelatingtoPhotovoltaicSolarEnergyConversion(Withdrawn2012)3E1462TestMethodsforInsulationIntegrityandGroundPathContinuityofPhotovoltaicModules3.Terminology3.1Definitions—DefinitionsoftermsusedinthistestmethodmaybefoundinTerminologiesE772andE1328.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1insulationresistance,n—theelectricalresistanceofaphotovoltaicarray’sinsulation,measuredbetweenthephoto-voltaiccircuitandexposed,electricallyconductivenon-current-carryingpartsandsurfacesofthearray.3.2.2metaloxidevaristorMOV,n—asurgeprotectiondevice.3.2.3photovoltaiccircuit—theactiveelectricalcircuitthatconductsthephotovoltaicgeneratedpower.4.SummaryofTestMethod4.1Aprocedureisprovidedfortestingtheelectricalisola-tionbetweenthearr...
