住宅楼施工临时用电方案#四川#用电设计方案.doc

某某佳苑"住宅小区工程施工现场临时用电施工方案工程名称：某某佳苑"住宅小区工程建设单位：某某房地产开发公司 施工单位：某某股份有限公司 技术负责人： 某某年07月目 录一、工程概况3二、编制依据3三、施工条件3四、设计内容和步骤6五、绘制临时供电施工图57六、安全用电技术措施68七、安全用电防火措施84一、工程概况本工程系某某房地产开发公司开发的尚水佳苑小区工程，位于南充市政府新区镇江东路和规划八路的东侧；小区东面靠嘉陵江，西面为南充炼油厂的职工住宅区。 本工程建设总用地面积44037 M2，其中：道路用地面积为2118M2，净用地面积为41919M2；总建筑面积为M2。本工程由某某房地产开公司投资建设，重庆大有建筑设计院设计，中冶成都勘察研究总院有限公司单位地质勘察，成都兴宏监理有限责任公司监理，总监由唐铁牛担任，某某组织施工；由柏家华担任项目经理，尹虹丁、龚能宏担任技术负责人。本工程为新建工程，施工现场范围内无通讯缆、管道、线路及各种埋地物，现场西南方施工围墙边有甲方提供的高压变压器。二、编制依据低压配电设计规范GB50054-95中国建筑工业出版社建筑工程施工现场供电安全规范GB50194-93中国建筑工业出版社通用用电设备配电设计规范GB50055-93中国建筑工业出版社供配电系统设计规范GB50052-95中国建筑工业出版社施工现场临时用电安全技术规范JGJ46-2005中国建筑工业出版社建筑施工安全检查标准JGJ59-99三、施工条件施工现场用电量统计表:-序号 机具名称 型号 安装功率(kW) 数量 合计功率(kW)1 塔式起重机 38 1 38 2 塔式起重机 38 1 38 3 混凝土输送泵 HB-15 32.2 1 32.2 4 插入式振动器 ZX50 1.1 1 1.1 5 插入式振动器 ZX35 0.8 1 0.8 6 钢筋调直机 GT4/14 4 1 4 7 钢筋切断机 QJ40-1 5.5 1 5.5 8 交流电焊机 BX3-500-2 38.6 1 38.6 9 木工圆锯 MJ106 5.5 1 5.5 10 100m高扬程水泵 5 1 5 11 100m高扬程水泵 5 1 5 12 100m高扬程水泵 5 1 5 14 塔式起重机 38 1 38 15 塔式起重机 38 1 38 16 塔式起重机 38 1 38 17 混凝土输送泵 HB-15 32.2 1 32.2 18 插入式振动器 ZX35 0.8 1 0.8 19 插入式振动器 ZX35 0.8 1 0.8 20 插入式振动器 ZX35 0.8 1 0.8 21 钢筋调直机 GT6/8 5.5 1 5.5 22 交流电焊机 BX3-500-2 38.6 1 38.6 23 钢筋切断机 QJ40-1 5.5 1 5.5 24 木工圆锯 MJ106 5.5 1 5.5 25 100m高扬程水泵 5 1 5 26 100m高扬程水泵 5 1 5 27 100m高扬程水泵 5 1 5 29 塔式起重机 38 1 38 30 塔式起重机 38 1 38 31 塔式起重机 38 1 38 32 混凝土输送泵 HB-15 32.2 1 32.2 33 插入式振动器 ZX35 0.8 1 0.8 34 插入式振动器 ZX35 0.8 1 0.8 35 插入式振动器 ZX50 1.1 1 1.1 36 钢筋调直机 GT6/8 5.5 1 5.5 37 钢筋调直机 GT6/8 5.5 1 5.5 38 钢筋切断机 QJ40-1 5.5 1 5.5 39 钢筋切断机 QJ40-1 5.5 1 5.5 41 交流电焊机 BX3-500-2 38.6 1 38.6 42 钢筋弯曲机 GW40 3 1 3 43 钢筋弯曲机 WJ40 3 1 3 44 木工圆锯 MJ106 5.5 1 5.5 45 100m高扬程水泵 5 1 5 46 100m高扬程水泵 5 1 5 47 100m高扬程水泵 5 1 5 -四、设计内容和步骤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R4。2、确定用电负荷:(1)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 38kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.4/0.25)1/2×38 = 48.07 kWPjs = Kx×Pe =0.2×48.07 = 9.61kWQjs = Pjs× tg=9.61×1.33 = 12.82 kvar(2)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 38kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.4/0.25)1/2×38 = 48.07 kWPjs = Kx×Pe =0.2×48.07 = 9.61kWQjs = Pjs× tg=9.61×1.33 = 12.82 kvar(3)、混凝土输送泵Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×32.2 = 9.66 kWQjs = Pjs× tg=9.66×1.02 = 9.86 kvar(4)、插入式振动器Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×1.1 = 0.33 kWQjs = Pjs× tg=0.33×1.02 = 0.34 kvar(5)、插入式振动器Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×0.8 = 0.24 kWQjs = Pjs× tg=0.24×1.02 = 0.24 kvar(6)、钢筋调直机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×4 = 1.2 kWQjs = Pjs× tg=1.2×1.02 = 1.22 kvar(7)、钢筋切断机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.65×1.02 = 1.68 kvar(8)、交流电焊机Kx = 0.35 Cos = 0.4 tg = 2.29将Jc =50%统一换算到Jc1 =100%的额定容量Pn = Sn ×Cos = 38.6×0.4=15.44kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.5/1)1/2×15.44 = 10.92 kWPjs = Kx×Pe =0.35×10.92 = 3.82kWQjs = Pjs× tg=3.82×2.29 = 8.76 kvar(9)、木工圆锯Kx = 0.3 Cos = 0.6 tg = 1.33Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.65×1.33 = 2.2 kvar(10)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×5 = 3.75 kWQjs = Pjs× tg=3.75×0.75 = 2.81 kvar(11)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×5 = 3.75 kWQjs = Pjs× tg=3.75×0.75 = 2.81 kvar(12)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×5 = 3.75 kWQjs = Pjs× tg=3.75×0.75 = 2.81 kvar(13)、自落式混凝土搅拌机Kx = 0.75 Cos = 0.85 tg = 0.62Pjs = 0.75×7.5 = 5.62 kWQjs = Pjs× tg=5.62×0.62 = 3.49 kvar(14)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 38kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.4/0.25)1/2×38 = 48.07 kWPjs = Kx×Pe =0.2×48.07 = 9.61kWQjs = Pjs× tg=9.61×1.33 = 12.82 kvar(15)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 38kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.4/0.25)1/2×38 = 48.07 kWPjs = Kx×Pe =0.2×48.07 = 9.61kWQjs = Pjs× tg=9.61×1.33 = 12.82 kvar(16)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 38kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.4/0.25)1/2×38 = 48.07 kWPjs = Kx×Pe =0.2×48.07 = 9.61kWQjs = Pjs× tg=9.61×1.33 = 12.82 kvar(17)、混凝土输送泵Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×32.2 = 9.66 kWQjs = Pjs× tg=9.66×1.02 = 9.86 kvar(18)、插入式振动器Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×0.8 = 0.24 kWQjs = Pjs× tg=0.24×1.02 = 0.24 kvar(19)、插入式振动器Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×0.8 = 0.24 kWQjs = Pjs× tg=0.24×1.02 = 0.24 kvar(20)、插入式振动器Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×0.8 = 0.24 kWQjs = Pjs× tg=0.24×1.02 = 0.24 kvar(21)、钢筋调直机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.65×1.02 = 1.68 kvar(22)、交流电焊机Kx = 0.35 Cos = 0.4 tg = 2.29将Jc =50%统一换算到Jc1 =100%的额定容量Pn = Sn ×Cos = 38.6×0.4=15.44kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.5/1)1/2×15.44 = 10.92 kWPjs = Kx×Pe =0.35×10.92 = 3.82kWQjs = Pjs× tg=3.82×2.29 = 8.76 kvar(23)、钢筋切断机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.65×1.02 = 1.68 kvar(24)、木工圆锯Kx = 0.3 Cos = 0.6 tg = 1.33Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.65×1.33 = 2.2 kvar(25)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×5 = 3.75 kWQjs = Pjs× tg=3.75×0.75 = 2.81 kvar(26)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×5 = 3.75 kWQjs = Pjs× tg=3.75×0.75 = 2.81 kvar(27)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×5 = 3.75 kWQjs = Pjs× tg=3.75×0.75 = 2.81 kvar(28)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×20 = 15 kWQjs = Pjs× tg=15×0.75 = 11.25 kvar(29)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 38kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.4/0.25)1/2×38 = 48.07 kWPjs = Kx×Pe =0.2×48.07 = 9.61kWQjs = Pjs× tg=9.61×1.33 = 12.82 kvar(30)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 38kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.4/0.25)1/2×38 = 48.07 kWPjs = Kx×Pe =0.2×48.07 = 9.61kWQjs = Pjs× tg=9.61×1.33 = 12.82 kvar(31)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33将Jc =40%统一换算到Jc1 =25%的额定容量Pn = 38kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.4/0.25)1/2×38 = 48.07 kWPjs = Kx×Pe =0.2×48.07 = 9.61kWQjs = Pjs× tg=9.61×1.33 = 12.82 kvar(32)、混凝土输送泵Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×32.2 = 9.66 kWQjs = Pjs× tg=9.66×1.02 = 9.86 kvar(33)、插入式振动器Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×0.8 = 0.24 kWQjs = Pjs× tg=0.24×1.02 = 0.24 kvar(34)、插入式振动器Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×0.8 = 0.24 kWQjs = Pjs× tg=0.24×1.02 = 0.24 kvar(35)、插入式振动器Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×1.1 = 0.33 kWQjs = Pjs× tg=0.33×1.02 = 0.34 kvar(36)、钢筋调直机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.65×1.02 = 1.68 kvar(37)、钢筋调直机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.65×1.02 = 1.68 kvar(38)、钢筋切断机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.65×1.02 = 1.68 kvar(39)、钢筋切断机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.65×1.02 = 1.68 kvar(40)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×20 = 15 kWQjs = Pjs× tg=15×0.75 = 11.25 kvar(41)、交流电焊机Kx = 0.35 Cos = 0.4 tg = 2.29将Jc =50%统一换算到Jc1 =100%的额定容量Pn = Sn ×Cos = 38.6×0.4=15.44kWPe = n×(Jc/Jc1)1/2×Pn = 1×(0.5/1)1/2×15.44 = 10.92 kWPjs = Kx×Pe =0.35×10.92 = 3.82kWQjs = Pjs× tg=3.82×2.29 = 8.76 kvar(42)、钢筋弯曲机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×3 = 0.9 kWQjs = Pjs× tg=0.9×1.02 = 0.92 kvar(43)、钢筋弯曲机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.3×3 = 0.9 kWQjs = Pjs× tg=0.9×1.02 = 0.92 kvar(44)、木工圆锯Kx = 0.3 Cos = 0.6 tg = 1.33Pjs = 0.3×5.5 = 1.65 kWQjs = Pjs× tg=1.65×1.33 = 2.2 kvar(45)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×5 = 3.75 kWQjs = Pjs× tg=3.75×0.75 = 2.81 kvar(46)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×5 = 3.75 kWQjs = Pjs× tg=3.75×0.75 = 2.81 kvar(47)、100m高扬程水泵Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.75×5 = 3.75 kWQjs = Pjs× tg=3.75×0.75 = 2.81 kvar(48)、自落式混凝土搅拌机Kx = 0.75 Cos = 0.85 tg = 0.62Pjs = 0.75×7.5 = 5.62 kWQjs = Pjs× tg=5.62×0.62 = 3.49 kvar(49)总的计算负荷计算，总箱同期系数取 Kx = 0.4总的有功功率Pjs = Kx×Pjs = 0.4×(9.61+9.61+9.66+0.33+0.24+1.2+1.65+3.82+1.65+3.75+3.75+3.75+5.62+9.61+9.61+9.61+9.66+0.24+0.24+0.24+1.65+3.82+1.65+1.65+3.75+3.75+3.75+15+9.61+9.61+9.61+9.66+0.24+0.24+0.33+1.65+1.65+1.65+1.65+15+3.82+0.9+0.9+1.65+3.75+3.75+3.75+5.62) = 85.58 kW总的无功功率Qjs = Kx×Qjs =0.4×(12.82+12.82+9.86+0.34+0.24+1.22+1.68+8.76+2.2+2.81+2.81+2.81+3.49+12.82+12.82+12.82+9.86+0.24+0.24+0.24+1.68+8.76+1.68+2.2+2.81+2.81+2.81+11.25+12.82+12.82+12.82+9.86+0.24+0.24+0.34+1.68+1.68+1.68+1.68+11.25+8.76+0.92+0.92+2.2+2.81+2.81+2.81+3.49) = 94.698 kvar总的视在功率Sjs = ( Pjs2+Qjs2 )1/2 = (85.582+94.6982)1/2 = 127.639 kVA总的计算电流计算Ijs = Sjs/(1.732×Ue) = 127.639/(1.732×0.38) = 193.933 A3、39工区干线线路上导线截面及分配箱、开关箱内电气设备选择:在选择前应对照平面图和系统图先由用电设备至开关箱计算，再由开关箱至分配箱计算，选择导线及开关设备。分配箱至开关箱，开关箱至用电设备的导线敷设采用铜橡皮绝缘导线穿硬塑料管敷设，由于这部分距离较短，因此不考虑电压降，只按安全载流量选择导线截面。(1)、塔式起重机开关箱至塔式起重机导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.6 tg = 1.33Ijs = Kx ×Pe /(1.732×Ue ×Cos) = 1×48.07/(1.732×0.38×0.6) = 121.72Aii)选择导线选择BX-4×50+1×25 ，穿硬塑料管时其安全载流量为140A。iii)选择电气设备选择开关箱内开关为DZ10-250/3 ，其脱扣器整定电流值为Ir = 200A。漏电保护器为 DZ10L-250/3。(2)、塔式起重机开关箱至塔式起重机导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.6 tg = 1.33Ijs = Kx ×Pe /(1.732×Ue ×Cos) = 1×48.07/(1.732×0.38×0.6) = 121.72Aii)选择导线选择BX-4×50+1×25 ，穿硬塑料管时其安全载流量为140A。iii)选择电气设备选择开关箱内开关为DZ10-250/3 ，其脱扣器整定电流值为Ir = 200A。漏电保护器为 DZ10L-250/3。(3)、混凝土输送泵开关箱至混凝土输送泵导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.7 tg = 1.02Ijs = Kx×Pe /(1.732×Ue ×Cos) = 1×32.2/(1.732×0.38×0.7) = 69.89Aii)选择导线选择BX-4×25+1×16 ，穿硬塑料管时其安全载流量为90A。iii)选择电气设备选择开关箱内开关为DZ10-100/3 ，其脱扣器整定电流值为Ir = 80A。漏电保护器为 DZ10L-100/3。(4)、插入式振动器开关箱至插入式振动器导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.7 tg = 1.02Ijs = Kx×Pe /(1.732×Ue ×Cos) = 1×1.1/(1.732×0.38×0.7) = 2.39Aii)选择导线选择BX-4×1+1×0.75 ，穿硬塑料管时其安全载流量为12A。iii)选择电气设备选择开关箱内开关为DZ5-20/3 ，其脱扣器整定电流值为Ir = 16A。漏电保护器为 DZ10L-100/3。(5)、插入式振动器开关箱至插入式振动器导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.7 tg = 1.02Ijs = Kx×Pe /(1.732×Ue ×Cos) = 1×0.8/(1.732×0.38×0.7) = 1.74Aii)选择导线选择BX-4×1+1×0.75 ，穿硬塑料管时其安全载流量为12A。iii)选择电气设备选择开关箱内开关为DZ5-20/3 ，其脱扣器整定电流值为Ir = 16A。漏电保护器为 DZ10L-100/3。(6)、钢筋调直机开关箱至钢筋调直机导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.7 tg = 1.02Ijs = Kx×Pe /(1.732×Ue ×Cos) = 1×4/(1.732×0.38×0.7) = 8.68Aii)选择导线选择BX-4×1+1×0.75 ，穿硬塑料管时其安全载流量为12A。iii)选择电气设备选择开关箱内开关为Hk1-15/3 ，熔断器RC1A-10其最大熔体电流为 IRD = 10A，可根据实际电流的2.5倍选择额定电流较小的熔丝，漏电保护器为 DZ10L-100/3。(7)、钢筋切断机开关箱至钢筋切断机导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.7 tg = 1.02Ijs = Kx×Pe /(1.732×Ue ×Cos) = 1×5.5/(1.732×0.38×0.7) = 11.94Aii)选择导线选择BX-4×1+1×0.75 ，穿硬塑料管时其安全载流量为12A。iii)选择电气设备选择开关箱内开关为Hk1-15/3 ，熔断器RC1A-15其最大熔体电流为 IRD = 15A，可根据实际电流的2.5倍选择额定电流较小的熔丝，漏电保护器为 DZ10L-100/3。(8)、交流电焊机开关箱至交流电焊机导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.4 tg = 2.29Ijs = Kx ×Pe /(1.732×Ue ×Cos) = 1×10.92/(1.732×0.38×0.4) = 41.47Aii)选择导线选择BX-4×10+1×6 ，穿硬塑料管时其安全载流量为52A。iii)选择电气设备选择开关箱内开关为DZ10-100/3 ，其脱扣器整定电流值为Ir = 80A。漏电保护器为 DZ10L-100/3。(9)、木工圆锯开关箱至木工圆锯导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.6 tg = 1.33Ijs = Kx×Pe /(1.732×Ue ×Cos) = 1×5.5/(1.732×0.38×0.6) = 13.93Aii)选择导线选择BX-4×1.5+1×1 ，穿硬塑料管时其安全载流量为16A。iii)选择电气设备选择开关箱内开关为Hk1-15/3 ，熔断器RC1A-15其最大熔体电流为 IRD = 15A，可根据实际电流的2.5倍选择额定电流较小的熔丝，漏电保护器为 DZ10L-100/3。(10)、100m高扬程水泵开关箱至100m高扬程水泵导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.8 tg = 0.75Ijs = Kx×Pe /(1.732×Ue ×Cos) = 1×5/(1.732×0.38×0.8) = 9.5Aii)选择导线选择BX-4×1+1×0.75 ，穿硬塑料管时其安全载流量为12A。iii)选择电气设备选择开关箱内开关为DZ5-20/3 ，其脱扣器整定电流值为Ir = 16A。漏电保护器为 DZ10L-100/3。(11)、100m高扬程水泵开关箱至100m高扬程水泵导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.8 tg = 0.75Ijs = Kx×Pe /(1.732×Ue ×Cos) = 1×5/(1.732×0.38×0.8) = 9.5Aii)选择导线选择BX-4×1+1×0.75 ，穿硬塑料管时其安全载流量为12A。iii)选择电气设备选择开关箱内开关为DZ5-20/3 ，其脱扣器整定电流值为Ir = 16A。漏电保护器为 DZ10L-100/3。(12)、100m高扬程水泵开关箱至100m高扬程水泵导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.8 tg = 0.75Ijs = Kx×Pe /(1.732×Ue ×Cos) = 1×5/(1.732×0.38×0.8) = 9.5Aii)选择导线选择BX-4×1+1×0.75 ，穿硬塑料管时其安全载流量为12A。iii)选择电气设备选择开关箱内开关为DZ5-20/3 ，其脱扣器整定电流值为Ir = 16A。漏电保护器为 DZ10L-100/3。(13)、自落式混凝土搅拌机开关箱至自落式混凝土搅拌机导线截面及开关箱内电气设备选择（开关箱以下机械启动后需要系数取1）:i)计算电流Kx = 1 Cos = 0.85 tg = 0.62Ijs = Kx×Pe /(1.732×Ue ×Cos) = 1×7.5/(1.732×0.38×0.85) = 13.41Aii)选择导线