施工现场临时用电方案(精)

C2005.11.12B2005.11.5A20051010版次Rev.日期Date编制PreparedBy审核ReviewedBy批准ApprovedByCBI业主/监理Owner/Supervisor修改说明RevisionDescription.CHINANUCLEARINDUSTRYHUAXINGCONSTRUCTIONCO.福建液化天然气站线工程FujianLNGTerminalandTrunklineProject液化天然气低温储罐土建工程LNGCryogenicTankCivilWorks编码CODEDD-MS-HUAX-004文件类别Doc.Type方案MethodStatement文件名称Doc.Title福建LNG施工现场临时用电方案MethodStatementofJobsiteTemporaryPowerofFJLNGProject版次Rev页码PageABCDEFG版次Rev页码PageABCDEFG0×××11×××1×××12×××2×××133×××144×××155×××166×××177×××188×××199×××2010×××21FUJIANLNGRECEIVINGTERMINAL_____________________________________________________________________________________________________________________________MethodStatementofJobSiteTemporaryPowerofFJLNGProject______________________________________________REVISION:CPAGE:2/12CHANGERECORDPAGEREVISIONDESCRIPTIONOFREVISIONCISSUEFORREVIEWFUJIANLNGRECEIVINGTERMINAL_____________________________________________________________________________________________________________________________MethodStatementofJobSiteTemporaryPowerofFJLNGProject______________________________________________REVISION:CPAGE:3/12目录Content1.工程概况General..............................................................................................................42.供配电方式MethodofPowerSupply..............................................................................43.配电箱和开关箱DistributionBoxandSwitchBox.......................................................54.现场防雷保护SiteLightningProtection........................................................................65.施工用电负荷计算CalculationofPowerLoadDuringConstruction..........................66.电缆、漏电保护器选择SelectingofCable,Switch........................................................76.1.主电缆截面的选择Selectionofmaincablesection......................................................76.2.开关选择SelectionofSwitch...........................................................................................87.临时用电平面图TemporaryPowerLayout....................................................................98.现场临时用电系统图SiteTemporaryPowerSystemLayout.......................................99.现场安全技术档案：SiteSafetyDocuments...................................................................910.安全用电及防火措施SafetyandFireproofingofusingPower....................................910.1.安全用电措施SafetyMeasures....................................................................................910.2.电气防火措施Fireproofingofelectricity..................................................................1110.3.雨季临时用电措施RainyTemporaryElectricityMeasures....................................12FUJIANLNGRECEIVINGTERMINAL_____________________________________________________________________________________________________________________________MethodStatementofJobSiteTemporaryPowerofFJLNGProject______________________________________________REVISION:CPAGE:4/121.工程概况General福建LNG低温储罐转运站工程位于福建省莆田市秀屿区。业主为我方现场提供1000KVA,2000KVA两台变压器，作为用电电源。主要的施工设备为五台塔吊，三台布料机以及二台升降机等，施工的主要特点是用电负荷大，施工用电需要系数大。FJLNGCryogenicStorageTankprojectislocatedinXiuYuDistrict,PutianCity,Fujian.Theclientprovidestwotransformerswithcapacityof1000KVAand2000KVArespectivelyaspowersupply.Duringtwotanksconstruction,themainequipmentincludesfivetowercranes,threeplacingboomsandtwoelevators.Theconstructionneedslargepowersupply,powercoefficientisgreat.2.供配电方式MethodofPowerSupply由业主现场提供的1000KVA，2000KVA变压器配电室低压柜已设电度表，故在我方各个总配电柜不再设置。供电方式采用三相五线制TN-S系统。为减少因停电对生产的影响面，故采用放射式的配电方式，即：从变压器配电室低压柜引出五个干线回路至施工现场五个总配电柜，分别供塔吊，地泵，升降机，施工照明以及机具用电，在总配电箱及开关箱，以及距离超过100m的箱内做重复接地，并与保护零线可靠联接。工作零线和保护零线要严格区分，不得混用。所有机电设备的金属外壳必须与保护零线做可靠联接。对负荷比较大的塔吊、地泵、采用单独回路配电，对距离较远且负荷较小的机具可采用树干式配电方式。Asammeterisattachedinthelow-voltagecabinetof1000KVA,2000KVAtransformerdistributionroomprovidedbyowner,wewillnotinstallanyammeterinmaindistributioncabinets.PoweristobeprovidedinTN-SSystemwith‘threephasesfivelines’.Inordertominishtheimpactofpoweroffuponproduction,radialwayofdistributionisadopted,thatis:togiveoutfivemainlinecircuitstositefivemaindistributionpanelsfromlow-voltagecabinets,whichrespectivelysupplypowerfortowercrane,concretepump,elevator,constructionlighting,machinesandtoolspower.Themaindistributionbox,switchboxandthedistanceover100mbetweendistributionboxandswitchboxshouldbeearthedrepeatedlyandwellconnectedtoPEline.TheNlineshouldbestrictlydifferentiatedfromPEline,cannotbeusedconfusedly.ThemetalshellsofallmechanicequipmentsshouldbewellconnectedtoPEline.ThewayofdistributionintowercraneFUJIANLNGRECEIVINGTERMINAL_____________________________________________________________________________________________________________________________MethodStatementofJobSiteTemporaryPowerofFJLNGProject______________________________________________REVISION:CPAGE:5/12andpumpwithcomparativelylargeloadshouldbeseparatecircuit.Nonetheless,thewayofdistributioninmachinesandtoolswithlongdistanceandlowerloadcouldbeintrunkdistribution.施工现场：根据现场实际情况变压器至现场总配电柜线路采用VV22电缆直埋的方式敷设，到塔吊、地泵的线路采用YCW电缆架空方式敷设至分配电柜，塔吊、地泵（布料机）设置独立防水开关箱，去移动式设备电源线采用耐磨电缆。Jobsite:Accordingtositecircumstance,transformertositemaindistributioncabin