电气专业毕业设计外文翻译--防雷接地

电气专业毕业设计外文翻译--防雷接地

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时间:2018-05-13

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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

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