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1、对n线重复接地的异议（ObjectiontorepeatearthingofNline）ThispaperiscontributedbyelectricaldataDOCdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyouselectTXTfirstordownloadthesourcefiletothelocalmachine.ObjectiontorepeatedearthingofNline1Introductioninthelowvoltageelectricalenginee
2、ring,the"neutralline(i.e.Nline)repeatedgrounding"oftheloadsideappearsrepeatedly,andtherequirementsaredifferent.SomeofthelocalpowersupplybureaurequirementsTrgroundingsysteminNlinerepeatgrounding,partoftheconstructionplanreviewlocalpersonnelandtheenforcementofthemandatoryprovisions;thecons
3、tructionplanreviewcenterinsomeplacesalsosetTN-SgroundingsysteminNlineshouldberepeatedgrounding;evennomatterwhatthegroundingsystem,aslongastheNlineitallwillrepeatgrounding,seeFigure1,2,3.WhenaskedwhytheNlinerepeatedlygrounding,allthereasonisbecausetheNlineis"zeroline",andaccordingtothenat
4、ionalstandard"zeroline"istorepeattheground.Itissaidthatthiscanpreventthezerolineofthethree-phasefourwireloop"(including"TIsystemandTNsystemofPENNlineandNline(line)inChinaisoftenreferredtoas"zerofault")causedbytheunbalanceofthree-phasevoltage,whichisaburningequipment.Itshouldbenotedthatth
5、eaforementioned"Nlinerepeatedearthing"requirestheinsulationoftheprotectiveearthingsystemoftheexposedconductivepartoftheelectricaldeviceinsidethebuilding.Inviewofthisconfusion,theauthorthinksitnecessarytoprobeintothedifferencebetweenrightandwrong.Otherwise,theelectricaldisasterwillnotexpl
6、ainthereason,theresultisnothing,cannotsummarizetheaccidentlesson.Nlineisstillrepeatedgrounding,electricalaccidentscontinuetothreatenthesafetyofpersonalandproperty,butalsoaffectthenormaloperationoftheequipment.Accordingtotherelevantprovisionsofthe2codeonrepeatedgrounding,thesourceofrepeat
7、edgroundingofzerolineisthenationalstandard"groundingdesigncodeforindustrialandcivilpowerinstallations"compiledin80s(GBJ65-83).Inordertobetterunderstandtherepetitivegroundrelatedcontent,theprovisionsnecessarytodigest"groundingdesignofindustrialandcivilelectricalinstallatio
