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1、LightningprotectiongroundingAbstractThesignificanceoflightningp.rotectionandmitigationonverylittlemoneytopreventlargelosses,anditsfunctionistousescientificmeansavoidnaturaldisasters.Groundingistomakethesystemhasbeenincludedinthelightningprotectionlightningenergydischarge
2、intotheearth,andgoodgroundingcaneffectivelyreducetheonlineguideovervoltage,avoidcounterattack.Avoidgroundisthemostimportantaspectoftechnology,whethersingsrem,inductionlightning,orotherformsofray,ultimatelythelightningcurrentintotheearth.Therefore,noreasonableandgoodgroun
3、dingdeviceiscan'treliablythelightningstrikes.Thesmallerthegroundingresistance,comelooseflowisquicker,lightningobjectsthetimetomaintainhighpotentialmoreshort,thelessriskKeyWords:Lightningprotection;Grounding;Current;potential1introductionInrecentyears,manydomesticandforei
4、gnstandardsdonotadvocateinformationequipmentusingindependentgroundingdevice,recommendtheuseofcommonearthingsystem.Forexample,the2000editionoftheGB50057-94"designcodeforprotectionofstructures"inpointoutclearly:"everybuildingitselfshouldadoptcommonearthingsystem"tobethebui
5、ldingswithinthevariousgroundingareunifiedtobuildingsbasedon,oroutdoorgroundingdevice.Whenthebuildingwashitbylightning,powersystemvoltageandelectricalequipmentgroundingvoltagerisesatthesametime,keeptheequipmentworkingvoltageconstant,sothattheelectronicequipmentfromlightni
6、ngstrikescanworknormally.Commonearthingsystemusuallyusethebuildingfoundationgroundingelectrode,thegroundingresistancelessthan1ohmingeneral,iftheequipmentgroundingresistancerequirementislower,shouldtaketheminimumvalue.Thegroundthathasbeenincorporatedintothelightningprotec
7、tionsystemoflightningenergydrainintotheearth,goodgroundingdownleadtoeffectivelyreducethevoltageontheback,toavoidtheoccurrenceof.Inthepastsomerequirementsofelectronicequipmentgroundingalone,thepurposeistopreventstraycurrentandtransientcurrentinpowernetworkdisturbanceofthe
8、normalworkofequipment.Before90time,forcesofthecommunicationnavigationequipmentelectronictubedevice,usin
