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1、外文資料：IntellectualbuildingelectricprotectionandearthSummary:Thistextpasstoseveralpowersupplyearthsystematicgeneralizationintroduction,isitsuitasintellectualpowersupplyearthsystemofbuildingtoscreen,andhasdonecomparativelyexhaustiveexplanationandanalysist
2、oallkindsofearthmeasuresshouldbetakennedbyit,electricprotectionthatshouldadopttotheintellectualbuildingandconnectingthepropersuggestionoflocallawproposition?Keyword:LoadisbalancedElectricpotentialformsomeearth,TN?Sofdatumpoint,defendstaticearthunifythe
3、earthbody.Supportdistributioninthedesign,earthisitoccupyimportantstatustodesignsystematicallyinbuilding,becauseitconcernsthedependabilityoftheelectricpowersystem,thesecurity?Nomatterhowmanybuildings,includeearthdesignsystematicallyalwaysinsupplyingpowe
4、rdesign.And,diflerentwithrequirementsofthebuilding,functionsofallkindsofequipmentaredifferent,earthsystemsarecorrespondinganddifferenttoo.Especiallyafterenteringthe1990s,alargenumberofintelligentappearanceofbuildingdesignandgetalotofnewcontentsoutofsys
5、tematicallyearth.Indailyseveralpersonwhoconnectsplace,whichkindbesuittheintelligentbuilding?Wemightaswellanalyseseveralkindsofearthsystems.l.TN-CsystemTN-Csystemcallthatintothree-phaseLinefoursystem,systematicneutrallineNthisprotectearthPEunitetwointoo
6、ne,generallycalledPENline.Althoughthiskindofearthsystemishighinsensitivitytotheearthtrouble,circuiteconomyissimple,butitisonlysuitableforandusedinthree-phaseloadinthemorebalancedplace.Intheintelligentbuilding,single-phaseloadproportionrelativelyheavy,d
7、ifficulttorealizethree-phasetobeloadbalanced,disequilibriumelectriccurrent,PENoflineaddbecausefluorescentlamp，brilliantfloodgatepersonwhoinchargeofhightimesofinharmonywaveelectriccurrentthatequipmentcausethatexistinthecircuit,initisnotthetroublecases,w
8、illsupeiposeattheNinneutralline,maketheneutrallineNvoltagefluctuate,andelectriccurrentlightandextremelyunstablewhenbeingheavy,causeneutralsomeelectricpotentialunstabletodriftaboutearth.Notonlywillelectrifyequipmentoutercover(connectswit
