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1、LightningprotectiongroundingAbstractThesignificanceoflightningp.rotectionandmitigationonverylittlemoneytopreventlargelosses,anditsfunctionistousescientificmeansavoidnaturaldisasters.Groundingistomakethesystemhasbeenincludedinthelightningprotectionlightningenergyd
2、ischargeintotheearth,andgoodgroundingcaneffectivelyreducetheonlineguideovervoltage,avoidcounterattack.Avoidgroundisthemostimportantaspectoftechnology,whethersingsrem,inductionlightning,orotherformsofray,ultimatelythelightningcurrentintotheearth.Therefore,noreason
3、ableandgoodgroundingdeviceiscan'treliablythelightningstrikes.Thesmallerthegroundingresistance,comelooseflowisquicker,lightningobjectsthetimetomaintainhighpotentialmoreshort,thelessriskKeyWords:Lightningprotection;Grounding;Current;potential1introductionInrecentye
4、ars,manydomesticandforeignstandardsdonotadvocateinformationequipmentusingindependentgroundingdevice,recommendtheuseofcommonearthingsystem.Forexample,the2000editionoftheGB50057-94"designcodeforprotectionofstructures"inpointoutclearly:"everybuildingitselfshouldadop
5、tcommonearthingsystem"tobethebuildingswithinthevariousgroundingareunifiedtobuildingsbasedon,oroutdoorgroundingdevice.Whenthebuildingwashitbylightning,powersystemvoltageandelectricalequipmentgroundingvoltagerisesatthesametime,keeptheequipmentworkingvoltageconstant
6、,sothattheelectronicequipmentfromlightningstrikescanworknormally.Commonearthingsystemusuallyusethebuildingfoundationgroundingelectrode,thegroundingresistancelessthan1ohmingeneral,iftheequipmentgroundingresistancerequirementislower,shouldtaketheminimumvalue.Thegro
7、undthathasbeenincorporatedintothelightningprotectionsystemoflightningenergydrainintotheearth,goodgroundingdownleadtoeffectivelyreducethevoltageontheback,toavoidtheoccurrenceof.Inthepastsomerequirementsofelectronicequipmentgroundingalone,thepurposeistopreventstray
8、currentandtransientcurrentinpowernetworkdisturbanceofthenormalworkofequipment.Before90time,forcesofthecommunicationnavigationequipmentelectronictubedevice,usin
