施工临时用电施工方案#负荷计算#施工工艺图.doc
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1、施工临时用电方案计算书一、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JGJ59-99二、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 钢筋弯曲机 GW40 3 1 3 2 钢筋弯曲机 GW40 3 1 3 3 钢筋切断机 QJ32-1 3 1 3 4 钢筋切
2、断机 QJ32-1 3 1 3 5 钢筋套丝机 GT6/8 5.5 1 5.5 6 钢筋套丝机 GT6/8 5.5 1 5.5 7 木工圆锯 MJ8 木工圆锯 MJ106 5.5 1 5.5 9 塔式起重机 QTZ40 24.9 1 24.9 10 塔式超重机 QTZ63 24.9 1 24.9 11 镝灯 3.5 1 3.5 12 卷扬机 JJZ-1 7.5 1 7.5 13 卷扬机 JJM-3 7.5 1 7.5 14 照明 ZM 10 1 10 15 搅拌机 JD150 5.5 1 5.5 16 搅拌机 JD150 5.5 1 5.5 17 钢筋调直机 GT3/9 7.5 1 7.5 1
3、8 钢筋调直机 GT3/9 7.5 1 7.5 19 交流电焊机 BX3-120-1 9 1 9 20 交流电焊机 BX3-120-1 9 1 9 21 热水器 RSQ 10 1 10 22 炒锅 CG 18 1 18 23 蒸箱 ZX 0.75 1 0.75 24 蒸箱 ZX 0.75 1 0.75 25 照明 ZM 10 1 10 -三、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
4、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)、钢筋弯曲机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.33 = 0.9 kWQjs = Pjs tg=0.91.02 = 0.92 kvar(2)、钢筋弯曲机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.33 = 0.9 kWQjs = Pjs tg=0.91.02 = 0.92 kvar(3)、钢筋切断机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.33 = 0.9 kWQjs
5、= Pjs tg=0.91.02 = 0.92 kvar(4)、钢筋切断机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.33 = 0.9 kWQjs = Pjs tg=0.91.02 = 0.92 kvar(5)、钢筋套丝机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.35.5 = 1.65 kWQjs = Pjs tg=1.651.02 = 1.68 kvar(6)、钢筋套丝机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.35.5 = 1.65 kWQjs = Pjs tg=1.651.02 = 1.68 kvar
6、(7)、木工圆锯Kx = 0.3 Cos = 0.6 tg = 1.33Pjs = 0.33 = 0.9 kWQjs = Pjs tg=0.91.33 = 1.2 kvar(8)、木工圆锯Kx = 0.3 Cos = 0.6 tg = 1.33Pjs = 0.35.5 = 1.65 kWQjs = Pjs tg=1.651.33 = 2.2 kvar(9)、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 = 24.9kWPe = n(Jc/Jc1)1/2Pn = 1(0.4/0.25)1/224.9 = 31.5 kW
7、Pjs = KxPe =0.231.5 = 6.3kWQjs = Pjs tg=6.31.33 = 8.4 kvar(10)、塔式起重机Kx = 0.2 Cos = 0.6 tg = 1.33Pjs = 0.224.9 = 4.98 kWQjs = Pjs tg=4.981.33 = 6.64 kvar(11)、镝灯Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.753.5 = 2.62 kWQjs = Pjs tg=2.620.75 = 1.97 kvar(12)、卷扬机Kx = 0.2 Cos = 0.6 tg = 1.33Pjs = 0.27.5 = 1.5 k
8、WQjs = Pjs tg=1.51.33 = 2 kvar(13)、卷扬机Kx = 0.2 Cos = 0.6 tg = 1.33Pjs = 0.27.5 = 1.5 kWQjs = Pjs tg=1.51.33 = 2 kvar(14)、照明Kx = 0.6 Cos = 0.4 tg = 2.29Pjs = 0.610 = 6 kWQjs = Pjs tg=62.29 = 13.75 kvar(15)、自落式混凝土搅拌机Kx = 0.75 Cos = 0.85 tg = 0.62Pjs = 0.755.5 = 4.12 kWQjs = Pjs tg=4.120.62 = 2.56 kvar
9、(16)、自落式混凝土搅拌机Kx = 0.75 Cos = 0.85 tg = 0.62Pjs = 0.755.5 = 4.12 kWQjs = Pjs tg=4.120.62 = 2.56 kvar(17)、钢筋调直机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.37.5 = 2.25 kWQjs = Pjs tg=2.251.02 = 2.3 kvar(18)、钢筋调直机Kx = 0.3 Cos = 0.7 tg = 1.02Pjs = 0.37.5 = 2.25 kWQjs = Pjs tg=2.251.02 = 2.3 kvar(19)、交流电焊机Kx = 0
10、.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 = 90.4=3.6kWPe = n(Jc/Jc1)1/2Pn = 1(0.5/1)1/23.6 = 2.55 kWPjs = KxPe =0.352.55 = 0.89kWQjs = Pjs tg=0.892.29 = 2.04 kvar(20)、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 = 90.4=3.6kWPe = n(Jc/Jc1)1/2Pn = 1(0.5/
11、1)1/23.6 = 2.55 kWPjs = KxPe =0.352.55 = 0.89kWQjs = Pjs tg=0.892.29 = 2.04 kvar(21)、热水器Kx = 0.8 Cos = 0.4 tg = 2.29Pjs = 0.810 = 8 kWQjs = Pjs tg=82.29 = 18.33 kvar(22)、炒锅Kx = 0.75 Cos = 0.8 tg = 0.75Pjs = 0.7518 = 13.5 kWQjs = Pjs tg=13.50.75 = 10.12 kvar(23)、蒸箱Kx = 0.8 Cos = 0.4 tg = 2.29Pjs = 0.
12、80.75 = 0.6 kWQjs = Pjs tg=0.62.29 = 1.37 kvar(24)、蒸箱Kx = 0.8 Cos = 0.4 tg = 2.29Pjs = 0.80.75 = 0.6 kWQjs = Pjs tg=0.62.29 = 1.37 kvar(25)、照明Kx = 0.6 Cos = 0.4 tg = 2.29Pjs = 0.610 = 6 kWQjs = Pjs tg=62.29 = 13.75 kvar(26)总的计算负荷计算,总箱同期系数取 Kx = 0.9总的有功功率Pjs = KxPjs = 0.9(0.9+0.9+0.9+0.9+1.65+1.65+0.
13、9+1.65+6.3+4.98+2.62+1.5+1.5+6+4.12+4.12+2.25+2.25+0.89+0.89+8+13.5+0.6+0.6+6) = 68.027 kW总的无功功率Qjs = KxQjs =0.9(0.92+0.92+0.92+0.92+1.68+1.68+1.2+2.2+8.4+6.64+1.97+2+2+13.75+2.56+2.56+2.3+2.3+2.04+2.04+18.33+10.12+1.37+1.37+13.75) = 93.541 kvar总的视在功率Sjs = ( Pjs2+Qjs2 )1/2 = (68.0272+93.5412)1/2 = 1
14、15.661 kVA总的计算电流计算Ijs = Sjs/(1.732Ue) = 115.661/(1.7320.38) = 175.735 A3、1号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)、钢筋弯曲机开关箱至钢筋弯曲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 =
15、1.02Ijs = KxPe /(1.732Ue Cos) = 13/(1.7320.380.7) = 6.51Aii)选择导线选择BX-41+10.75 ,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。(2)、钢筋弯曲机开关箱至钢筋弯曲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 = KxPe /(1.732U
16、e Cos) = 13/(1.7320.380.7) = 6.51Aii)选择导线选择BX-41+10.75 ,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。(3)、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 = KxPe /(1.732Ue Cos) = 13/(1.7320.380
17、.7) = 6.51Aii)选择导线选择BX-41+10.75 ,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。(4)、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 = KxPe /(1.732Ue Cos) = 13/(1.7320.380.7) = 6.51Aii)选择导线选择BX-
18、41+10.75 ,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。(5)、钢筋套丝机开关箱至钢筋套丝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 = KxPe /(1.732Ue Cos) = 15.5/(1.7320.380.7) = 11.94Aii)选择导线选择BX-41+10.75 ,穿硬塑料管时其安全载
19、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)、钢筋套丝机开关箱至钢筋套丝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 = KxPe /(1.732Ue Cos) = 15.5/(1.7320.380.7) = 11.94Aii)选择导线选择BX-41+10.75 ,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
20、。漏电保护器为 DZ10L-100/3。(7)、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 = KxPe /(1.732Ue Cos) = 13/(1.7320.380.6) = 7.6Aii)选择导线选择BX-41+10.75 ,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。(8)、木工
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