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1、兰州交通大学毕业设计(论文)摘要本设计为兰州铁路局下西院住宅小区12号楼照明供配电系统设计。设计负荷等级为三级,进线电压为380/220V,户用电负荷为6千瓦。设计内容包括:照度计算、负荷计算、导线及其截面的选择、低压断路器电流整定、设备制作及安装、等电位联接安装及防雷与接地系统设计。本设计采用单位容量法进行照度计算,采用需用系数法进行负荷计算,按导线长期允许温升和电压损失选择导线截面,按线路最大工作电流和线路保护选择低压断路器。照明回路和插座回路分别由不同回路供电,并在插座回路安装剩余电流保护器。按三类防雷
2、建筑物进行防雷设计,接地采用TN—S系统,并设计总等电位联结和局部等电位联结系统。设计符合国家相关技术规程规范要求,设备选型合理,满足使用功能要求,能较好地指导施工。关键词:住宅;照明;负荷计算;供配电系统;防雷-I-兰州交通大学毕业设计(论文)AbstractThedesignisentitledwithelectricalilluminationdesignonthe12thresidentialbuildinglocatedinXiaxiCourtyardofLanzhouRailwayBureau.T
3、heloadleveloftheprojectisdesignedasthe3rdhierarchy,andinputvoltagelevelispresentedby380/220V,andhouseholdloadisdesignedas6kW.Thedesigncontentsincludeilluminationcalculation,loadcalculation,andtheselectionofcircuitsandcrosssections,andthecurrentsettingoflowv
4、oltagebreaker,andequipmentsmakingandinstallation,andequiotentialbonding,andaswellaslightingprotectionandgroundingsystemandetal.Firstly,unitcapacitymethodisappliedtoimplementilluminationcalculation,andtheneededcoefficientmethodisappliedtoimplementtheloadcalc
5、ulation,andthecrosssectionsofthecircuitsareselectedaccordingtolong-termallowabletemperatureriseandvoltageloss,andthelow-voltagebreakersareselectedaccordingtothemaximumworkingcurrentandlineprotectionconditions.Socketandlightingcircuitsarearrangedindifferents
6、upplyloop,andleakageprotectionbreakerisappliedinsocketloop.Lightingprotectionwiththe3rdlevelisdesignedinaccordancewithspecifications,andgroundingsystemadoptsTN-Ssystem,andgeneralequipotentialconnection,togentherlocalequipotentialconnectionisdesigned.Theover
7、alldesignaccordswiththerelevanttechnicalregulationrequirements.Equipmentsselectionisreasonablesoastobettermeettheapplicablefunctions,andbeabletobetterguidetheconstruction.Keywords:Residential,Illumination,Loadcalculation,Supplyanddistributionsystem,Thunderp
8、rotection-II-兰州交通大学毕业设计(论文)目录摘要.....................................................................................................................................IAbstract............................