施工现场临时用电设计1、编制依据(1)《低压配电设计规范》GB50054-2011(2)《建筑工程施工现场供电安全规范》GB50194-1993(3)《通用用电设备配电设计规范》GB50055-2011(4)《供配电系统设计规范》GB50052-2009(5)《施工现场临时用电安全技术规范》JGJ46-20052、施工条件2.1工程概况本工程位于无锡市锡山区新春东路交江海东路南东侧。本工程项目由3栋框架剪力墙结构的33层高层和一个大地下车库由人防和非人防组成。其中三期总建筑面积为68343㎡,其中地上建筑面积为54288.35㎡,地下室建筑总建筑面积为14054.65㎡。本工程建筑设计使用年限:三类、50年。本工程抗震设防类别为丙类,抗震设防烈度为6度。本工程高层建筑防火类别为二类,建筑耐火等级:地下室为一级,其余为二级。本工程由无锡市城归设计院有限公司设计,南通瑞达建设监理有限公司,上海绿地建筑工程有限公司承建。2.2施工现场用电量统计表序号设备名称铭牌功率(kW)安装功率(kW)数量合计功率(kW)1塔式起重机_QTZ6335.5044.90144.902圆盘锯3.003.0026.003高压水泵20.0020.00240.004潜水泵2.202.2036.605插入式振动器ZX701.501.5011.506平板振动器4.324.3214.327双笼电梯200*20020.0020.00480.008楼面照明3.003.0039.009钢筋切断机4.004.0028.0010钢筋弯曲机WJ-402.202.2024.4011钢筋调直切断机_TQ4-144.004.0028.0012交流电焊机5kVA521013自落式混凝土搅拌机_JD1505.505.50316.5014塔式起重机_QTZ6335.4044.78144.7815插入式振动器_ZX701.101.1011.1016平板振动器2.002.0024.0017办公照明15.0015.00115.0018塔式起重机_QTZ8046.0058.19158.1919高压泵20.0020.00120.0020插入式振动器ZX702.202.2012.2021生活区用电25.0025.00125.0022合计400.533、设计内容和步骤3.1、现场勘探及初步设计(1)本工程所在施工现场范围内无各种埋地管线。(2)现场采用380V低压供电,设一配电总箱,内有计量设备,采用TN-S系统供电。(3)根据施工现场用电设备布置情况,采用导线穿钢管埋地敷设,布置位置及线路走向参见临时配电系统图及现场平面图,采用三级配电,两级防护。(4)按照《JGJ46-2005》规定制定施工组织设计,接地电阻R≤4Ω。3.2确定用电负荷(1)塔式起重机_QTZ63组Kx=0.30,Cosφ=0.70,tgφ=1.02将Jc=40%统一换算到Jc=25%的额定容量Pe=n×(Jc/Jc1)1/2×Pn=1×(0.40/0.25)1/2×35.50=44.90kWPjs=Kx×Pe=0.30×44.90=13.47kWQjs=Pjs×tgφ=13.47×1.02=13.74kVar(2)圆盘锯组Kx=0.70,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.70×6.00=4.20kWQjs=Pjs×tgφ=4.20×1.02=4.28kVar(3)高压水泵组Kx=0.70,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.70×20.00=14.00kWQjs=Pjs×tgφ=14.00×1.02=14.28kVar(4)潜水泵组Kx=0.70,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.70×2.20=1.54kWQjs=Pjs×tgφ=1.54×1.02=1.57kVar(5)插入式振动器ZX70组Kx=0.70,Cosφ=0.68,tgφ=1.08Pjs=Kx×Pe=0.70×1.50=1.05kWQjs=Pjs×tgφ=1.05×1.08=1.13kVar(6)平板振动器组Kx=0.70,Cosφ=0.68,tgφ=1.08Pjs=Kx×Pe=0.70×4.32=3.02kWQjs=Pjs×tgφ=3.02×1.08=3.26kVar(7)双笼电梯200*200组Kx=0.30,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.30×20.00=6.00kWQjs=Pjs×tgφ=6.00×1.02=6.12kVar(8)楼面照明组Kx=0.70,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.70×3.00=2.10kWQjs=Pjs×tgφ=2.10×1.02=2.14kVar(9)钢筋切断机组Kx=0.70,Cosφ=0.40,tgφ=2.29Pjs=Kx×Pe=0.70×8.00=5.60kWQjs=Pjs×tgφ=5.60×2.29=12.83kVar(10)钢筋弯曲机WJ-40组Kx=0.70,Cosφ=0.40,tgφ=2.29Pjs=Kx×Pe=0.70×4.40=3.08kWQjs=Pjs×tgφ=3.08×2.29=7.06kVar(11)钢筋调直切断机_TQ4-14组Kx=0.70,Cosφ=0.40,tgφ=2.29Pjs=Kx×Pe=0.70×8.00=5.60kWQjs=Pjs×tgφ=5.60×2.29=12.83kVar(12)交流电焊机组Kx=0.45,Cosφ=0.45,tgφ=1.98将Jc=40%统一换算到Jc=100%的额定容量Pe=n×(Jc/Jc1)1/2×Pn=2×(4/1.00)1/2×0.82=10.4kWPjs=Kx×Pe=0.45×10.4=4.7kWQjs=Pjs×tgφ=4.7×1.98=9.3kVar(13)自落式混凝土搅拌机_JD150组Kx=0.70,Cosφ=0.68,tgφ=1.08Pjs=Kx×Pe=0.70×16.50=11.55kWQjs=Pjs×tgφ=11.55×1.08=12.45kVar(14)塔式起重机_QTZ63组Kx=0.30,Cosφ=0.70,tgφ=1.02将Jc=40%统一换算到Jc=25%的额定容量Pe=n×(Jc/Jc1)1/2×Pn=1×(0.40/0.25)1/2×35.40=44.78kWPjs=Kx×Pe=0.30×44.78=13.43kWQjs=Pjs×tgφ=13.43×1.02=13.70kVar(15)高压水泵组Kx=0.70,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.70×20.00=14.00kWQjs=Pjs×tgφ=14.00×1.02=14.28kVar(16)潜水泵组Kx=0.70,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.70×2.20=1.54kWQjs=Pjs×tgφ=1.54×1.02=1.57kVar(17)插入式振动器_ZX70组Kx=0.70,Cosφ=0.68,tgφ=1.08Pjs=Kx×Pe=0.70×1.10=0.77kWQjs=Pjs×tgφ=0.77×1.08=0.83kVar(18)平板振动器组Kx=0.70,Cosφ=0.68,tgφ=1.08Pjs=Kx×Pe=0.70×2.00=1.40kWQjs=Pjs×tgφ=1.40×1.08=1.51kVar(19)双笼电梯组Kx=0.30,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.30×40.00=12.00kWQjs=Pjs×tgφ=12.00×1.02=12.24kVar(20)楼面照明组Kx=0.70,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.70×3.00=2.10kWQjs=Pjs×tgφ=2.10×1.02=2.14kVar(21)办公照明组Kx=1.00,Cosφ=1.00,tgφ=0Pjs=Kx×Pe=1.00×15.00=15.00kWQjs=Pjs×tgφ=15.00×0=0.00kVar(22)塔式起重机_QTZ80组Kx=0.30,Cosφ=0.70,tgφ=1.02将Jc=40%统一换算到Jc=25%的额定容量Pe=n×(Jc/Jc1)1/2×Pn=1×(0.40/0.25)1/2×46.00=58.19kWPjs=Kx×Pe=0.30×58.19=17.46kWQjs=Pjs×tgφ=17.46×1.02=17.81kVar(23)双笼电梯SC200*200组Kx=0.30,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.30×20.00=6.00kWQjs=Pjs×tgφ=6.00×1.02=6.12kVar(24)潜水泵组Kx=0.70,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.70×2.20=1.54kWQjs=Pjs×tgφ=1.54×1.02=1.57kVar(25)高压泵组Kx=0.70,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.70×20.00=14.00kWQjs=Pjs×tgφ=14.00×1.02=14.28kVar(26)平板振动器组Kx=0.70,Cosφ=0.68,tgφ=1.08Pjs=Kx×Pe=0.70×2.00=1.40kWQjs=Pjs×tgφ=1.40×1.08=1.51kVar(27)插入式振动器ZX70组Kx=0.70,Cosφ=0.68,tgφ=1.08Pjs=Kx×Pe=0.70×2.20=1.54kWQjs=Pjs×tgφ=1.54×1.08=1.66kVar(28)楼面照明组Kx=0.70,Cosφ=0.70,tgφ=1.02Pjs=Kx×Pe=0.70×3.00=2.10kWQjs=Pjs×tgφ=2.10×1.02=2.14kVar(29)生活区用电组Kx=0.70,Cosφ=0.68,tgφ=1.08Pjs=Kx×Pe=0.70×25.00=17.50kWQjs=Pjs×tgφ=17.50×1.08=18.87kVar(30)总的计算负荷计算,干线同期系数取Kx=0.90总的有功功率Pjs=1.1×Kx×ΣPjs=1.1×0.90×(13.47+4.20+14.00+1.54+1.05+3.02+6.00+2.10+5.60+3.08+5.60+0.47+11.55+13.43+14.00+1.54+0.77+1.40+12.00+2.10+15.00+17.46+6.00+1.54+14.00+1.40+1.54+2.10+17.50)=191.53kW总的无功功率Qjs=1.1×Kx×ΣQjs=1.1×0.90×(13.74+4.28+14.28+1.57+1.13+3.26+6.12+2.14+12.83+7.06+12.83+0.93+12.45+13.70+14.28+1.57+0.83+1.51+12.24+2.14+0.00+17.81+6.12+1.57+14.28+1.51+1.66+2.14+18.87)=200.86kVar总的视在功率Sjs=(Pjs2+Qjs2)1/2=(191.532+200.862)1/2=277.54kVA总的计算电流计算Ijs=Sjs/(1.732×Ue)=277.54/(1.732×0.38)=421.68A3.3、选择总箱的进线截面及进线开关(1)选择导线截面:1)按安全载流量:上面已经计算出总计算电流Ijs=421.68A2)按允许电压降:S=1.1×Kx×Σ(PL)/C△U=1.1×0.90×11104.74/(77.00×5.00)=28.56mm23)根据前面两条:电缆线空气明敷,铜芯聚氯乙烯(铠装)绝缘电缆线YJV3×185+2×95,其安全载流量为424A,截面面积185mm2,能够满足使用要求。(2)选择总进线开关:DZ10-600/3,其脱扣器整定电流值为Ir=480A。(3)选择总箱中漏电保护器:ZBM1-630/500。3.4导线分路说