3300v的精选

1以空气作为绝缘介质柜内各相导体间与对地间净距cm项额定电压kV3.67.212(11.5)2440.51导体至接地间净距7.51012.520302不同相的导体之间的净距7.51012.518303导体至无孔遮栏间净距10.51315.521334导体至网状遮栏间净...