1、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)高壓熔斷器額定電流（A）總出線斷路器額定電流(A)互感器變比(A)變壓器低壓側出線選擇高壓側低壓側IpIk母線槽(A)銅母線（TMY)規格（mm2)VV電纜規格(mm2)16049.2230.914.725.7716250300/5-4(404)200411.5288.718.407.2220315400/5-4(404)3240+1120250414.4360.823.009.0225400500/56304(404)2(3150+170)315418.2454

2、.728.9811.3732500650/56304(505)2(3240+1120)400423.1577.436.8114.4340630800/58004(636.3)32(1185)+(1185)500428.9721.746.0118.0450800800/510003(806.3)+1(636.3)32(1240)+1(1240)630436.4909.357.9722.736310001000/512503(808)+1(636.3)32(1400)+1(1400)800646.21154.749.0719.258012501500/516003(1008)+1(806.3)34

3、(1185)+2(1185)1000657.71443.461.3424.0610016002000/520003(12510)+1(808)34(1240)+2(1240)1250672.21804.276.6830.0712520002500/5250032(10010)+1(10010)34(1400)+2(1400)1600692.42309.498.1538.4916025003000/5315032(12510)+1(12510)-20006115.52886.8122.6948.1120032004000/5400032(12510)+1(12510)-25006144.3360

4、8.4153.3660.1425040005000/5500033(12510)+1(12516)-附注：1.Ip-短路電流峰值；Ik-對稱穩態三相短路電流有效值；短路電流計算以上級系統容量無窮大為計算條件。計算公式Ik=Se/1000(3UeUk%)=100Se/1000(30.4Uk)=Se/3/4Uk(kA)Ip=2.55Ik變壓器 高壓側額定電流=Sr/(3Ue)=Se/3/10(A)低壓側額定電流=Sr/(3Ue)=Se/3/0.4(A)變壓器低壓側中性點接地線選擇YJV電纜規格(mm2)銅母線(mm2)鍍鋅扁鋼(mm2)BV電纜(mm2)VV電纜(mm2)裸銅絞線(mm2)3150+1701532541501501353185+1951532541501501353300+11501534041701701502(3150+170）2034041701701502(3185+195）20340419519517032(1240)+1(1240)2534051120112017032(1300)+1(1300)2535051150115019534(1150)+2(1150)3045051150115019534(1240)+2(1240)3045051150115019534(1300)+2(1300)304635118511851120-404805-1