1、1#1#楼楼计计算算负负荷荷及及配配电电干干线线表表序号供电区域名称装设功率（kW）需要系数（KX）计算功率Pjs（kW）无功功率Qjs(kvar)视在功率Sjs(kVA)功率因数COStan整定电流（A）计算电流（A）干线线径配电箱编号备注1区排烟、加压送风83.901.000.800.75200159.302（ZR-EE-4*120+70）双电源切换(消防电源)2、区排烟、加压送风62.201.000.800.75200118.102（ZR-EE-4*120+7）双电源切换(消防电源)3消防值班室12.901.0012.9012.130.730.946338.102（ZR-EE-4*+）双
2、电源切换4消防水泵放71.101.000.800.75200137.602（ZR-EE-4*120+70）双电源切换(消防电源)5（区）消防电梯40.000.208.006.000.800.751002（ZR-EE-4*+）双电源切换6区电梯40.000.208.006.000.800.751002（ZR-EE-4*+）双电源切换7区电梯24.800.204.963.720.800.75632（ZR-EE-4*+）双电源切换8区电梯20.000.204.003.000.800.75632（ZR-EE-4*+）双电源切换9人防设备20.000.800.75632（ZR-EE-4*+）双电源切换(
3、消防电源)10网络机房设备、照明129.200.81104.65100.460.720.96315226.002（ZR-EE-4*+）双电源切换11网络机房空调、锅炉房应急排风201.600.71143.14107.360.800.75350271.80（ZR-EE-4*120+70）个回路、每个回路根线（双电源切换）12间、分配线间26.601.0026.2025.150.720.968058.202（ZR-EE-4*+）双电源切换13冷水机组214.001.00214.00132.680.850.62500382.502（ZR-EE-4*1+）14冷水机组214.001.000.850.6
4、2500382.502（ZR-EE-4*1+）备用15 设备房、锅炉房255.600.98250.49180.350.810.72630475.302（ZR-EE-4*+）非双电源16生活水泵房33.800.9532.1124.080.800.758061.20ZR-EE-4*+两用一备17地下一层插座、照明33.200.6019.9215.540.790.786342.70ZR-EE-4*+第 1 页，共 5 页18区照明114.700.90103.2349.550.900.48315204.30ZR-EE-4*+19区插座282.200.70197.54201.490.701.026304
5、30.802（ZR-EE-4*+）20区新风机组、风机盘管63.901.0063.9047.930.800.75200126.30ZR-EE-4*120+7021区照明74.200.9066.7832.050.900.48200140.50ZR-EE-4*120+7022区插座165.500.77127.44129.990.701.02350278.102（ZR-EE-4*120+70）23区新风机组、风机盘管36.601.0036.6027.450.800.7512570.80ZR-EE-4*+24区一层照明、插座、新风机组、风机盘管39.300.8834.5824.900.810.7210
6、074.00ZR-EE-4*+25区二层照明、插座、新风机组、风机盘管36.800.8732.0222.410.820.7010067.20ZR-EE-4*+26区三五层照明、插座、新风机组、风机盘管76.400.8766.4747.860.810.72200140.90ZR-EE-4*120+70合计2372.501556.931200.10取KP=KQ=0.901401.241080.091769.2 自然功率因数:COS1=1401.24/1769.20=0.79,tan1=0.78经无功补偿后功率因数COS2=0.90,tan2=0.48,无功补偿容量QC=Pjs(tan1-tan2)
7、=1401.24(0.78-0.48)=420.37kvar659.721548.78如无功补偿500kvar1401.24580.091516.570.921#1#楼楼计计算算负负荷荷及及配配电电干干线线表表序号供电区域名称装设功率（kW）需要系数（KX）计算功率Pjs（kW）无功功率Qjs(kvar)视在功率Sjs(kVA)功率因数COStan整定电流（A）计算电流（A）干线线径配电箱编号备注第 2 页，共 5 页电力负荷需要系数序号负荷名称需要系数（KX）功率因数COStan序号负荷名称需要系数（KX）功率因数COStan1总负荷0.450.800.7513送风机0.700.800.75
8、2总电力负荷0.550.800.7514热泵新风机0.501.000.003总照明负荷0.400.850.6215冷源机组0.750.800.754制冷机房0.650.800.7516照明0.850.900.485锅炉房0.650.750.8817办公插座0.100.701.026水泵房0.650.800.7518IT0.600.800.757通风机房0.650.800.7519UPS0.800.800.758电梯0.200.800.7520起重机0.150.501.739厨房0.400.701.0221通风机0.750.800.7510洗衣机房0.300.701.0222水泵电动机0.800
9、.800.7511窗式空调器0.400.801.0223连续运输机械0.650.750.8812MAU0.750.801.0224冷源机组等0.750.5013生活给水泵0.750.8025普消泵0.750.8014排污泵0.750.8026喷淋泵0.750.8015冷却塔水泵0.750.8027消防电梯0.200.5016送风机0.700.8028U PS0.800.8017空调机组0.700.8029应急电源1.000.9018热泵新风机组0.501.0030施工机械需要系数序号负荷名称需要系数（KX）功率因数COStan序号负荷名称需要系数（KX）功率因数COStan1塔吊0.300.5
10、01.737降水泵0.800.701.022混泥土输送泵0.700.701.028卷扬机0.800.701.023闪光对焊机0.350.701.029冷拉机0.800.701.024竖焊机0.700.451.9810弯曲机0.800.701.025电焊机0.350.601.3311木工机械0.700.701.026振动泵0.800.701.0212照明1.001.000.00一期工程临电施工负荷计算表序号设备名称设备台数设备装设功率（PS）需要系数（KX）功率因数COStan有功功率（Pjs）无功功率（Qjs）视在功率（Sjs）备注1裁板机13.000.750.750.882.251.982钢
11、筋弯曲机412.000.800.701.029.609.793钢筋切断机39.000.650.750.886.755.944卷扬机215.000.800.701.0212.0012.245平板振动器22.800.700.701.021.962.006插入式振动器1011.000.800.701.028.806.167加压泵26.000.600.701.023.603.678砼输送泵190.000.700.701.0263.0064.269砼搅拌机412.000.650.750.887.806.8610塔吊131.000.300.501.739.3016.0911砼搅拌站160.000.550.
12、800.7588.0066.0012对焊机181.000.350.601.3328.3537.7113交流电焊机252.000.350.601.3318.2024.2114电渣压力机2146.000.350.601.3351.1067.9615照明20.000.400.850.628.004.96合计35650.80318.71329.83456.65 取kPp=0.9，kQq=0.9286.84296.85412.80自然功率因数COS1=Pjs1/Sjs1=286.84/412.8=0.69，tan1=1.05，经无功补偿后功率因数达到COS2=0.9，tan2=0.48，则补偿容量Qc=Pjs1*（tan1-tan2）=286.84*（1.05-0.48）=163.50kvar，则补偿后的总视在功率:Sjs2=（Pjs12+QjS22）=（286.842+（296.85-163.50）2）=316.32kVA。故选择315kVA的变压器。pjs=sjscos,Qjs=pjstan
