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1、1#1#樓樓計計算算負負荷荷及及配配電電干干線線表表序號供電區(qū)域名稱裝設功率（kW）需要系數(shù)（KX）計算功率Pjs（kW）無功功率Qjs(kvar)視在功率Sjs(kVA)功率因數(shù)COStan整定電流（A）計算電流（A）干線線徑配電箱編號備注1區(qū)排煙、加壓送風83.901.000.800.75200159.302（ZR-EE-4*120+70）雙電源切換(消防電源)2、區(qū)排煙、加壓送風62.201.000.800.75200118.102（ZR-EE-4*120+7）雙電源切換(消防電源)3消防值班室12.901.0012.9012.130.730.946338.102（ZR-EE-4*+）雙

2、電源切換4消防水泵放71.101.000.800.75200137.602（ZR-EE-4*120+70）雙電源切換(消防電源)5（區(qū)）消防電梯40.000.208.006.000.800.751002（ZR-EE-4*+）雙電源切換6區(qū)電梯40.000.208.006.000.800.751002（ZR-EE-4*+）雙電源切換7區(qū)電梯24.800.204.963.720.800.75632（ZR-EE-4*+）雙電源切換8區(qū)電梯20.000.204.003.000.800.75632（ZR-EE-4*+）雙電源切換9人防設備20.000.800.75632（ZR-EE-4*+）雙電源切換(

3、消防電源)10網(wǎng)絡機房設備、照明129.200.81104.65100.460.720.96315226.002（ZR-EE-4*+）雙電源切換11網(wǎng)絡機房空調、鍋爐房應急排風201.600.71143.14107.360.800.75350271.80（ZR-EE-4*120+70）個回路、每個回路根線（雙電源切換）12間、分配線間26.601.0026.2025.150.720.968058.202（ZR-EE-4*+）雙電源切換13冷水機組214.001.00214.00132.680.850.62500382.502（ZR-EE-4*1+）14冷水機組214.001.000.850.6

4、2500382.502（ZR-EE-4*1+）備用15 設備房、鍋爐房255.600.98250.49180.350.810.72630475.302（ZR-EE-4*+）非雙電源16生活水泵房33.800.9532.1124.080.800.758061.20ZR-EE-4*+兩用一備17地下一層插座、照明33.200.6019.9215.540.790.786342.70ZR-EE-4*+第 1 頁，共 5 頁18區(qū)照明114.700.90103.2349.550.900.48315204.30ZR-EE-4*+19區(qū)插座282.200.70197.54201.490.701.026304

5、30.802（ZR-EE-4*+）20區(qū)新風機組、風機盤管63.901.0063.9047.930.800.75200126.30ZR-EE-4*120+7021區(qū)照明74.200.9066.7832.050.900.48200140.50ZR-EE-4*120+7022區(qū)插座165.500.77127.44129.990.701.02350278.102（ZR-EE-4*120+70）23區(qū)新風機組、風機盤管36.601.0036.6027.450.800.7512570.80ZR-EE-4*+24區(qū)一層照明、插座、新風機組、風機盤管39.300.8834.5824.900.810.7210

6、074.00ZR-EE-4*+25區(qū)二層照明、插座、新風機組、風機盤管36.800.8732.0222.410.820.7010067.20ZR-EE-4*+26區(qū)三五層照明、插座、新風機組、風機盤管76.400.8766.4747.860.810.72200140.90ZR-EE-4*120+70合計2372.501556.931200.10取KP=KQ=0.901401.241080.091769.2 自然功率因數(shù):COS1=1401.24/1769.20=0.79,tan1=0.78經(jīng)無功補償后功率因數(shù)COS2=0.90,tan2=0.48,無功補償容量QC=Pjs(tan1-tan2)

7、=1401.24(0.78-0.48)=420.37kvar659.721548.78如無功補償500kvar1401.24580.091516.570.921#1#樓樓計計算算負負荷荷及及配配電電干干線線表表序號供電區(qū)域名稱裝設功率（kW）需要系數(shù)（KX）計算功率Pjs（kW）無功功率Qjs(kvar)視在功率Sjs(kVA)功率因數(shù)COStan整定電流（A）計算電流（A）干線線徑配電箱編號備注第 2 頁，共 5 頁電力負荷需要系數(shù)序號負荷名稱需要系數(shù)（KX）功率因數(shù)COStan序號負荷名稱需要系數(shù)（KX）功率因數(shù)COStan1總負荷0.450.800.7513送風機0.700.800.75

8、2總電力負荷0.550.800.7514熱泵新風機0.501.000.003總照明負荷0.400.850.6215冷源機組0.750.800.754制冷機房0.650.800.7516照明0.850.900.485鍋爐房0.650.750.8817辦公插座0.100.701.026水泵房0.650.800.7518IT0.600.800.757通風機房0.650.800.7519UPS0.800.800.758電梯0.200.800.7520起重機0.150.501.739廚房0.400.701.0221通風機0.750.800.7510洗衣機房0.300.701.0222水泵電動機0.800

9、.800.7511窗式空調器0.400.801.0223連續(xù)運輸機械0.650.750.8812MAU0.750.801.0224冷源機組等0.750.5013生活給水泵0.750.8025普消泵0.750.8014排污泵0.750.8026噴淋泵0.750.8015冷卻塔水泵0.750.8027消防電梯0.200.5016送風機0.700.8028U PS0.800.8017空調機組0.700.8029應急電源1.000.9018熱泵新風機組0.501.0030施工機械需要系數(shù)序號負荷名稱需要系數(shù)（KX）功率因數(shù)COStan序號負荷名稱需要系數(shù)（KX）功率因數(shù)COStan1塔吊0.300.5

10、01.737降水泵0.800.701.022混泥土輸送泵0.700.701.028卷揚機0.800.701.023閃光對焊機0.350.701.029冷拉機0.800.701.024豎焊機0.700.451.9810彎曲機0.800.701.025電焊機0.350.601.3311木工機械0.700.701.026振動泵0.800.701.0212照明1.001.000.00一期工程臨電施工負荷計算表序號設備名稱設備臺數(shù)設備裝設功率（PS）需要系數(shù)（KX）功率因數(shù)COStan有功功率（Pjs）無功功率（Qjs）視在功率（Sjs）備注1裁板機13.000.750.750.882.251.982鋼

11、筋彎曲機412.000.800.701.029.609.793鋼筋切斷機39.000.650.750.886.755.944卷揚機215.000.800.701.0212.0012.245平板振動器22.800.700.701.021.962.006插入式振動器1011.000.800.701.028.806.167加壓泵26.000.600.701.023.603.678砼輸送泵190.000.700.701.0263.0064.269砼攪拌機412.000.650.750.887.806.8610塔吊131.000.300.501.739.3016.0911砼攪拌站160.000.550.

12、800.7588.0066.0012對焊機181.000.350.601.3328.3537.7113交流電焊機252.000.350.601.3318.2024.2114電渣壓力機2146.000.350.601.3351.1067.9615照明20.000.400.850.628.004.96合計35650.80318.71329.83456.65 取kPp=0.9，kQq=0.9286.84296.85412.80自然功率因數(shù)COS1=Pjs1/Sjs1=286.84/412.8=0.69，tan1=1.05，經(jīng)無功補償后功率因數(shù)達到COS2=0.9，tan2=0.48，則補償容量Qc=Pjs1*（tan1-tan2）=286.84*（1.05-0.48）=163.50kvar，則補償后的總視在功率:Sjs2=（Pjs12+QjS22）=（286.842+（296.85-163.50）2）=316.32kVA。故選擇315kVA的變壓器。pjs=sjscos,Qjs=pjstan