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1、1 1、三三相相電電機(jī)機(jī)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(fù)負(fù)荷荷計計算算序號負(fù)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(fù)荷時需要的有功功率（Pjs計算負(fù)荷）與設(shè)備容量Pe之比。這個數(shù)值可根據(jù)負(fù)荷性質(zhì)，查表求得，并根據(jù)經(jīng)驗對其進(jìn)行修正。額定電壓2 2、電電力力系
3、系統(tǒng)統(tǒng)負(fù)負(fù)荷荷計計算算序號負(fù)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(jī)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(fù)負(fù)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(fù)負(fù)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(biāo)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(dá)含義輸入給定參數(shù)輸出CosPjs（KW）Ijs（A)功率因數(shù)計算負(fù)荷，是指通過負(fù)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(fù)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(fù)負(fù)荷荷計計算算2 2、電電力力系系統(tǒng)統(tǒng)負(fù)負(fù)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(fù)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(fù)負(fù)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(dá)達(dá)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(dá)達(dá)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(fù)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(fù)荷率、效率、臺數(shù)、工作情況及線路損耗有關(guān)，而且與維護(hù)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(dá)達(dá)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(fù)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(dá)達(dá)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(dá)達(dá)含含義義4 4、電電力力系系統(tǒng)統(tǒng)負(fù)負(fù)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(fù)負(fù)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(fù)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(fù)負(fù)荷荷計計算算
電工表格計算器(可計算電機(jī)電流、變壓器選型、銅鋁重量)
