變壓器容量與母排開關選型配合表標準計算

10/0.4kV變壓器與低壓斷路器、互感器及母線等配合表,,,,,,,,,,,,,,,,,,,,,

變壓器容量Se(kVA),阻抗電壓Uk%,額定電流(A),,低壓出口短路電流(kA),,低壓補償容量,,,高壓熔斷器額定電流（A）,高壓互感器變比(A),總出線斷路器額定電流(A),低壓互感器變比(A),變壓器低壓側出線選擇,,,,變壓器低壓側中性點接地線選擇,,,,

,,高壓側,低壓側,Ip,Ik,,,,,,,,母線槽(A),銅母線(TMY-)規(guī)格(mm2),VV電纜規(guī)格(mm2),YJV電纜規(guī)格(mm2),銅母線(mm2),鍍鋅扁鋼(mm2),BV電纜(mm2),VV電纜(mm2),裸銅絞線(mm2)

160,4,9.2,230.9,14.72,5.77,10kVAx5,72.2A,50,16,,250,300/5,-,4(40×4),,3×150+1×70,15×3,25×4,1×50,1×50,1×35

200,4,11.5,288.7,18.40,7.22,10kVAx6,87A,60,20,,315,400/5,-,4(40×4),3×240+1×120,3×185+1×95,15×3,25×4,1×50,1×50,1×35

250,4,14.4,360.8,23.00,9.02,15kVAx7,108A,75,25,30,400,500/5,630,4(40×4),2(3×150+1×70),3×300+1×150,15×3,40×4,1×70,1×70,1×50

315,4,18.2,454.7,28.98,11.37,15kVAx6,130A,90,32,30,500,500/5,630,4(50×5)+1(30×5),2(3×240+1×120),2(3×150+1×70）,20×3,40×4,1×70,1×70,1×50

400,4,23.1,577.4,36.81,14.43,15kVAx8,173A,120,40,30,630,750/5,800,4(50×10)+1(40×5),3×2(1×185)+(1×185),2(3×185+1×95）,20×3,40×4,1×95,1×95,1×70

500,4,28.9,721.7,46.01,18.04,15kVAx10,217A,150,50,40,800,1000/5,1000,4(60×10)+1(40×5),3×2(1×240)+1(1×240),3×2(1×240)+1(1×240),25×3,40×5,1×120,1×120,1×70

630,4,36.4,909.3,57.97,22.73,15kVAx12,260A,189,63,50,1000,1000/5,1250,4(80×10)+1(50×6),3×2(1×400)+1(1×400),3×2(1×300)+1(1×300),25×3,50×5,1×150,1×150,1×95

800,6,46.2,1154.7,49.07,19.25,15kVAx16,347A,240,80,75,1250,1000/5,1600,4(100×10)+1(60×6),3×4(1×185)+2(1×185),3×4(1×150)+2(1×150),30×4,50×5,1×150,1×150,1×95

1000,6,57.7,1443.4,61.34,24.06,15kVAx20,434A,300,100,75,1600,1500/5,2000,4(100×10)+1(80×8)/4[2(80×10)]+1(60×6),3×4(1×240)+2(1×240),3×4(1×240)+2(1×240),30×4,50×5,1×150,1×150,1×95

1250,6,72.2,1804.2,76.68,30.07,15kVAx24,520A,360,125,100,2000,2000/5,2500,4[2(100×10)]+1(80×8),3×4(1×400)+2(1×400),3×4(1×300)+2(1×300),30×4,63×5,1×185,1×185,1×120

1600,6,92.4,2309.4,98.15,38.49,,,,160,150,2500,2500/5,3150,4[2(100×8)]+1(80×8),-,-,40×4,80×5,-,1×240,1×150

2000,6,115.5,2886.8,122.69,48.11,,,,200,150,3200,3000/5,4000,4[2(100×10)]+1(80×8),-,-,40×4,100×5,-,1×240,1×185

2500,6,144.3,3608.4,153.36,60.14,,,,250,150,4000,4000/5,5000,4[3(100×10)]+1(80×8),-,-,40×5,80×8,-,1×300,1×240

附注：1.Ip-短路電流峰值；Ik-對稱穩(wěn)態(tài)三相短路電流有效值；短路電流計算以上級系統(tǒng)容量無窮大為計算條件。,,,,,,,,,,,,,,,,,,,,,

,計算公式,①Ik=Se/1000(√3×Ue×Uk%)=100Se/1000(√3×0.4×Uk)=Se/√3/4Uk(kA),,,,,,,,,,,,,,,,,,,

,,②Ip=2.55Ik,,,,,,,,,,,,,,,,,,,

,,③變壓器,高壓側額定電流=Sr/(√3×Ue)=Se/√3/10(A),,,,,,,,,,,,,,,,,,

,,,低壓側額定電流=Sr/(√3×Ue)=Se/√3/0.4(A),,,,,,,,,,,,,,,,,,

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變壓器容量/17.32/3.5或變壓器容量/60.62=變比N,,,,,,,"1、如果你那里是10kV供電，則1600kVA變壓器的額定電流為：I=1600/(1.732*10)=92.4(A)；

2、計量用電流互感器多按額定電流選取，所以可以選擇10kV，100/5，精度0.2S級的電流互感器；

3、計量用電壓互感器是固定的，可選10000/100V，精度0.2級，容量450VA的電壓互感器。",,,,,,,,,,,,,,

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