>> P.110
StandardnameStandardNumberAbstractLow-voltagesurgeprotectivedevices–Part11:Surgeprotectivedevicesconnectedtolow-voltagepowersystems–RequirementsandtestmethodsIEC61643-11Low-voltagesurgeprotectivedevices–Part12:Surgeprotectivedevicesconnectedtolow-voltagepowersystems–SelectionandapplicationprinciplesIEC61643-12IEC61643-11isapplicabletodevicesforsurgeprotectionagainstindirectanddirecteffectsoflightningorothertransientovervoltages.Thesedevicesarepackagedtobeconnectedto50/60Hza.c.powercircuits,andequipmentratedupto1000Vr.m.s.Performancecharacteristics,standardmethodsfortestingandratingsareestab-lished.Thesedevicescontainatleastonenonlinearcomponentandareintendedtolimitsurgevoltagesanddivertsurgecurrents.ThisfirsteditionofIEC61643-11cancelsandreplacesthesecondeditionofIEC61643-1publishedin2005.ThemainchangeswithrespectofthesecondeditionofIEC61643-1arethecompleterestructuringandimprovementofthetestproceduresandtestsequences.NOTE:TheattentionofNationalCommitteesisdrawntothefactthatequipmentmanufacturersandtestingorganizationsmayneedatransitionalperiodfollowingpublicationofanew,amendedorrevisedIECpublicationinwhichtomakeproductsinaccordancewiththenewrequirementsandtoequipthemselvesforconductingneworrevisedtests.Itistherecommendationofthecommitteethatthecontentofthispublicationbeadoptedfornationalimplementationnotearlierthan12monthsfromthedateofpublication.Inthemeantime,thepreviouseditioncanstillbeorderedbycontactingyourlocalIECmemberNationalCommitteeortheIECCentralOfce.IEC61643-12describestheprinciplesfortheselection,operation,locationandcoordinationofSPDstobeconnectedto50/60HzACpowercircuits,andequipmentratedupto1000VRMS.Thesedevicescontainatleastonenon-linearcomponentandareintendedtolimitsurgevoltagesanddivertsurgecurrents.NOTE1Additionalrequirementsforspecialapplicationsarealsoapplicable,Ifrequired.NOTE2IEC60364andIEC62305-4arealsoapplicable.NOTE3ThisstandarddealonlywithSPDsandnotwithsurgeprotectioncompo-nents(SPC)integratedinsideequipment.Thisthirdeditioncancelsandreplacesthesecondeditionpublishedin2008.Thiseditionconstitutesatechnicalrevision.NOTEThefollowingdifferingpracticeofalesspermanentnatureexistsintheUSA:IntheUSA,SPDstestedtoClassItestsarenotrequired.Thisexceptionappliestotheentiredocument.Thiseditionincludesthefollowingsignicanttechnicalchangeswithrespecttothepreviousedition:a)Scope:Deletedreferenceto1500VDCb)Addedorrevisedsomedenitionsc)Addednewclause4onNeedforprotectiond)Addednewinformationondisconnectingdevicese)RevisedCharacteristicsofSPDf)RevisedListofparametersforSPDselectiong)AddednewinformationonMeasuredLimitingVoltageh)AddedorrevisedsomeAnnexes110
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