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StandardnameStandardNumberAbstractLowvoltagesurgeprotectivedevices–Part21:Surgeprotectivedevicesconnectedtotelecommunicationsandsignallingnetworks–PerformancerequirementsandtestingmethodsIEC61643-21Low-voltagesurgeprotectivedevices–Part22:Surgeprotectivedevicesconnectedtotelecommunicationsandsignallingnetworks–SelectionandapplicationprinciplesIEC61643-22Low-voltagesurgeprotectivedevices–Part31:RequirementsandtestmethodsforSPDsforphotovoltaicinstallationsIEC61643-31IEC61643-21:isapplicabletodevicesforsurgeprotectionoftelecommunicationsandsignallingnetworksagainstindirectanddirecteffectsoflightningorothertransientovervoltages.ThepurposeoftheseSPDsistoprotectmodernelectronicequipmentconnectedtotelecommunicationsandsignallingnetworkswithnominalsystemvoltagsupto1000V(r.m.s.)a.c.and1500Vd.c.ThecontentsofthecorrigendumofMarch2001havebeenincludedinthiscopy.Thisconsolidatedversionconsistsofthefirstedition(2000),itsamendment1(2008)andamendment2(2012).Therefore,noneedtoorderamendmentinadditiontothispublication.IEC61643-22describestheprinciplesfortheselection,operation,locationandcoordinationofSPDsconnectedtotelecommunicationandsignallingnetworkswithnominalsystemvoltagesupto1000Vr.m.s.a.c.and1500Vd.c.ThisstandardalsoaddressesSPDsthatincorporateprotectionforsignallinglinesandpowerlinesinthesameenclosure(socalledmultiserviceSPDs).Thissecondeditioncancelsandreplacesthefirsteditionpublishedin2004.Thiseditionconstitutesatechnicalrevision.Thiseditionincludesthefollowingsignicanttechnicalchangeswithrespecttothepreviousedition:-----UpdatetheuseofmultiserviceSPDs(Article8);ComparisonbetweenSPDclassicationofIEC61643-11andIEC61643-21(7.3.3);ConsiderationofnewtransmissionsystemsasPoE(AnnexF);EMCrequirementsofSPDs(AnnexG);MaintenancecyclesofSPDs(AnnexI).Keywords:SPD,surgeprotectivedevicesIEC61643-31isapplicabletoSurgeProtectiveDevices(SPDs),intendedforsurgeprotectionagainstindirectanddirecteffectsoflightningorothertransientovervoltages.ThesedevicesaredesignedtobeconnectedtotheDCsideofphotovoltaicinstallationsratedupto1500VDC.Thesedevicescontainatleastonenon-linearcomponentandareintendedtolimitsurgevoltagesanddivertsurgecurrents.Performancecharacteristics,safetyrequirements,standardmethodsfortestingandratingsareestablished.SPDscomplyingwiththisstandardareexclusivelydedicatedtobeinstalledontheDCsideofphotovoltaicgeneratorsandtheDCsideofinverters.SPDsforPVsystemswithenergystorage(e.g.batteries,capacitorbanks)arenotcovered.SPDswithseparateinputandoutputterminalsthatcontainspecicseriesimpedancebetweentheseterminal(s)(socalledtwo-portSPDsaccordingtoIEC61643-11)arenotcovered.SPDscompliantwiththisstandardaredesignedtobepermanentlyconnectedwhereconnectionanddisconnectionoffixedSPDscanonlybedoneusingatool.ThisstandarddoesnotapplytoportableSPDs.111
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