阻抗电压UK=4%时Ik(KA)阻抗电压UK=6%时Ik(KA)50721.8051.2031001443.612.412002887.224.8122503609.0256.0531545511.3757.5840057814.459.6350072218.0512.0363091022.7515.116800115628.919.261000144436.124.061250180545.12530.081600231257.838.532000289072.2548.1672500361390.32560.21731504552113.875.867将额定工作电压400V时的额定电流与最大短路电流去除以1.732(即根号3)则可获得相同容量压器在690V时的数据。变压器最严重的短路是三相短路,三相短路时的短路电流最大。相间短路是三相短路的0.87倍左右,单相接地短路是三相短路的.0.5倍左右。短路电流与变压器的容量成正比,短路电流与变压器的阻抗电压成反比额定工作电压400V,变压器的额定电流In与最大短路电流Ik,计算公式:额定电流=容量除以(1.732×电压)变压器容量Se(KVA)额定电流In(A)最大短路电流Ik(KA)