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1、AStudyontheMicrostructureandSurgeCharacteristicsofZnOVaristorforDistributionArresterS.S.Kim,H.G.Cho,1.S.Choi,T.G.Park,C.H.Park,S.Y.Jung,Non-Member,ZEEEconductorsthereafter[I]-[3].BecauseofsuchelectricalAbstract-ZnO.varistorswithvariousformulation,suchascharacteristics,theyare
2、widelyusedasthesurgeabsorbersinA-E,werefabricatedaccordingtoceramicfabricationmethod.electroniccircuitsandthecoreelementofsurgearrestersinThemicrostructure,electricalproperties,andsurgeelectricalpowersystemsagainstdangerousover-voltagecharacteristicsofZnOvaristorswereinvestig
3、atedaccordingtosurges,suchaslightningsurges,switchingsurgesandelectio-variousformulations.Inthemicrostructure,ATE'Sceramicsmagnetictransients[4].Inthemeantime,althoughthesinteredat113OCwasconsistedofZnOgrain(ZnO),spinelphaseimportanceofthesurgearrestersisincreasing,only(Zn,33
4、Sho.670,),Bi-richphase(Bi,03)andintergranulerphase,wholly.LightningimpulseresidualvoltageofA,B,CandE'sdistributionclassproductsarepartiallylocalized.Especially,varistorssuitedstandardcharacteristics,helow12WatcurrentbecausemostZnOvaristorsimportedfromUSAorJapan,of5MM.Onthecon
5、trary,D'svaristorexhibitedhighresidualnecessityoflocalizationisrequiredexcessively.voltageashighreferencevoltage.Intheacceleratedagingtest,ThepurposeofthispaperistodevelopZnOvaristorswhichleakagecurrentandwattlossofB,CandD'svaristorsincreasesexhibithighnonlinearity,surgewiths
6、tandingcapabilityandabruptlywithstresstimeunderthefirsta.c.stressfastresponsebyinvestigatingmicrostructureandelectrical(115CR.213W/300h).Consequently,C'svaristorexhibitedacharacteristicsofZnOvaristormanufactured'bychangingthermalrunaway.Onthecontrary,leakagecurrentandwattloss
7、contentratioofBi203/Sb203andAI2O3ISiO2aboutonebasisofAandC'svaristorswhichshowlowinitialleakagecurrentexhibitedconstantcharacteristics.Afterhighcurrentimpulsetest,formulation.A'svaristorhasbrokenthesideofvaristorbutimpulsecurrentflowed.Onthecontrary,E'svaristorexhibitedgooddi
8、schargeII.EXPERIMENTALPROCEDUREcharacteristics,whichtheappearanceofv
