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1、1 1、三三相相電電機機額額定定電電流流計計算算公公式式（直直接接輸輸入入）功率KW功率因數(shù)cos電流A（中國380V電壓）電流A（德國400V電壓）2.20.853.933.7430.855.365.0940.857.156.79110.8519.6618.68150.8526.8125.47220.8539.3337.36300.8553.6350.94450.8580.4476.42600.85107.25101.89900.85160.88152.831000.85178.75169.811100.85196.63186.802.20.93.713.5330.95.064.8140.9

2、6.756.42110.918.5717.64150.925.3224.06220.937.1435.28300.950.6548.11450.975.9772.17600.9101.2996.23900.9151.94144.341000.9168.82160.381100.9185.70176.422 2、電電力力系系統(tǒng)統(tǒng)負負荷荷計計算算序號負荷類型Pe（KW）KxUe（V）釋義設(shè)備容量，一般是將所有設(shè)備銘牌容量相加而求得。需用系數(shù)，是用電設(shè)備在最大負荷時需要的有功功率（Pjs計算負荷）與設(shè)備容量Pe之比。這個數(shù)值可根據(jù)負荷性質(zhì)，查表求得，并根據(jù)經(jīng)驗對其進行修正。額定電壓2 2、電電力力系

3、系統(tǒng)統(tǒng)負負荷荷計計算算序號負荷類型Pe（KW）KxUe（V）1動力210.843802動力370.853803動力6900.853804動力23.40.853805動力00.753806動力00.853807動力0.83808動力0.83809動力0.838010動力0.8380合計771.4單位（KW）3 3、變變壓壓器器容容量量選選型型計計算算公公式式（直直接接輸輸入入）電機總功率總系數(shù)視在功率（計算）有功功率（計算）無功功率（計算）SjsPjsQjs3500.85330.56297.5144.093600.85340.00306148.203700.85349.44314.5152.32

4、3800.85358.89323156.443880.85366.44329.8159.733880.85366.44329.8159.736900.85617.37586.5192.776900.7536.67483233.936900.6460.00414200.516900.85651.67586.5284.056900.85617.37586.5192.774 4、電電力力系系統(tǒng)統(tǒng)負負荷荷計計算算(將將以以上上表表2 2、表表3 3整整合合)序號回路編號總功率Pe（KW）需用系數(shù)Kx功率因數(shù)Cos1370.850.82370.850.8323.40.850.8423.40.850.85

5、00.750.8600.850.8700.80.85800.80.85900.80.851000.80.85合合計計總總負負荷荷:Pe=120.8(KW):Pe=120.8(KW)平平均均功功率率因因數(shù)數(shù)=0.82=0.825 5、變變壓壓器器容容量量與與其其電電流流計計算算公公式式（直直接接輸輸入入）容量KVA高壓電壓KV高壓電流A低壓電壓KV低壓電流A80104.620.4115.47100105.770.4144.34125107.220.4180.43160109.240.4230.952001011.550.4288.682501014.430.4360.853151018.190.

6、4454.684001023.090.4577.375001028.870.4721.716301036.370.4909.358001046.190.41154.7310001057.740.41443.4212501072.170.41804.2716001092.380.42309.47200010115.470.42886.84250010144.340.43608.55315010181.870.44546.77400010230.950.45773.67500010288.680.47217.09630010363.740.49093.53800010461.890.411547.

7、341000010577.370.414434.186 6、鋁鋁排排計計算算公公式式（直直接接輸輸入入）截面(mm)長度(米）密度(Kg/m3)重量(公斤)440127000.432550127000.675660127000.972880127001.72810100127002.7809270007 7、銅銅排排計計算算公公式式（直直接接輸輸入入）截面(mm)長度(米）密度(Kg/m3)重量(公斤)440189001.424550189002.225660189003.204880189005.69610100189008.9890008 8、銅銅線線截截面面計計算算公公式式（直直接接輸輸

8、入入）直徑(mm)截面(mm)根數(shù)計算截面標稱截面23.1415913.1415942.364.37434991614.37434991662.585.22791991915.22791991961.892.80551841719.638628872523.1415913.14159423.1415913.1415949 9、銅銅線線重重量量計計算算公公式式（直直接接輸輸入入）直徑(mm)截面(mm2)根數(shù)計算截面(mm2)長度(m)1.82.544687912.544687915037.068577517.068577515037.068577517.068577515037.0685775

9、17.068577515023.1415913.14159120023.1415913.141591200顏色表達含義輸入給定參數(shù)輸出CosPjs（KW）Ijs（A)功率因數(shù)計算負荷，是指通過負荷的統(tǒng)計計算求出的，用來按發(fā)熱條件來選擇供電系統(tǒng)中各元件（包括設(shè)備和線路等）的負荷值，用電單位到供電部門申報的用電功率就是指此計算功率。PjsPeKx計算電流，其值為：IjsPjs/(1.732UeCos)CosPjs（KW）Ijs（A)0.817.6433.50249182 2、電電力力系系統(tǒng)統(tǒng)負負荷荷計計算算2 2、電電力力系系統(tǒng)統(tǒng)負負荷荷計計算算0.831.4559.730916490.8586.

10、51113.9008750.819.8937.775768810.8000.8000.85000.85000.85000.8500平均功率因數(shù)655.481244.9100520.82（KW）（A)功率因數(shù)選用的變壓器負荷率CosSSjs/S0.940082.64%0.940085.00%0.940087.36%0.940089.72%0.940091.61%0.940091.61%0.9563097.99%0.963085.19%0.963073.02%0.9630103.44%0.9563097.99%額定電壓Ue（V）設(shè)備相數(shù)視在功率S(KVA)計算有功功率Pjs（KW）380三相39.

11、3131.45380三相39.3131.45380三相24.8619.89380三相24.8619.894 4、電電力力系系統(tǒng)統(tǒng)負負荷荷計計算算(將將以以上上表表2 2、表表3 3整整合合)380三相0.000.00380三相0.000.00380三相0.000.00380三相0.000.00380三相0.000.00380三相0.000.00視視在在功功率率:S=:S=128.35128.35有有功功功功率率:Pj=102.68(KW):Pj=102.68(KW)顏顏色色表表達達含含義義單價(元/公斤)合計(元)2611.2322617.552625.2722644.9282670.2260

12、顏顏色色表表達達含含義義單價(元/公斤)合計(元)86122.46486191.3586275.54486489.85686765.4860截面率%78.5397572.9058319387.1319986578.5545154778.5397578.53975體積(m3)密度(Kg/m3)重量(公斤)單價(元/公斤)0.00038170389003.397158347500.00106028727002.862773888150.00106028727005150.00106028727002.862773888150.003769908890033.5521812600.003769908

13、890033.552181260備注用電設(shè)備的額定功率Pe是指這個設(shè)備的輸出功率，它與輸入容量之間有一個效率n1；用電設(shè)備不一定滿載工作，存在一個負荷系數(shù)Ks；用電設(shè)備組的全部設(shè)備并不同時運行，存在同時運行系數(shù)Kt；向用電設(shè)備供電的線路有損耗，存在線路效率n2。所以用電設(shè)備的有功功率需要量為P30=Pe*Ks*Kt/(n1*n2)=Pe*Kx我們令需用系數(shù) KxKs*Kt/(n1*n2）需用系數(shù)的值總小于1，它不僅與設(shè)備的負荷率、效率、臺數(shù)、工作情況及線路損耗有關(guān)，而且與維護管理水平等因素也有關(guān)系。備注三相三相三相三相三相三相三相三相三相三相顏顏色色表表達達含含義義輸入給定參數(shù)輸出計算無功功率

14、Qjs（KVar）計算有功電流Ijs（A)選用的變壓器S(KVA)負荷率Sjs/S23.5959.734009.83%23.5959.734009.83%14.9237.784006.22%14.9237.784006.22%0.000.0010000.00%0.000.004000.00%0.000.004000.00%0.000.004000.00%0.000.004000.00%0.000.004000.00%無無功功功功率率:Qjs=77.01(Kvar)Qjs=77.01(Kvar)有有功功電電流流:Ijs=195.0:Ijs=195.013370608971337060897(A)

15、(A)160016008.02%輸入給定參數(shù)輸出顏顏色色表表達達含含義義輸入給定參數(shù)輸出合計(元)169.857917342.941608317542.941608312013.1308722013.130872顏顏色色表表達達含含義義4 4、電電力力系系統(tǒng)統(tǒng)負負荷荷計計算算序號回路編號總功率Pe（KW）需用系數(shù)Kx 功率因數(shù)Cos額定電壓Ue（V）設(shè)備相數(shù)視在功率S(KVA)1370.850.8380三相39.312370.850.65380三相48.38323.40.850.95380三相20.94423.40.850.8380三相24.8658900.750.8380三相834.3863

16、500.850.8380三相371.88700.80.85380三相0.00800.80.85380三相0.00900.80.85380三相0.001000.80.85380三相0.00合合計計總總負負荷荷:Pe=1360.8(KW):Pe=1360.8(KW)平平均均功功率率因因數(shù)數(shù)=0.82=0.82視視在在功功率率:S=:S=1339.751339.75計算有功功率Pjs（KW）計算無功功率Qjs（KVar）計算有功電流Ijs（A)選用的變壓器S(KVA)負荷率Sjs/S31.4523.5959.734009.83%31.4536.7773.5140012.10%19.896.5431.

17、814005.23%19.8914.9237.784006.22%667.50500.631267.74100083.44%297.50223.13565.0240092.97%0.000.000.004000.00%0.000.000.004000.00%0.000.000.004000.00%0.000.000.004000.00%有有功功功功率率:Pj=1067.68(:Pj=1067.68(KW)KW)無無功功功功率率:Qjs=805.56165Qjs=805.561651208146(Kvar)1208146(Kvar)有有功功電電流流:Ijs=2035.593:Ijs=2035.5938639386886393868 (A)(A)1600160083.73%4 4、電電力力系系統(tǒng)統(tǒng)負負荷荷計計算算