低压配电系统的疼惜选择性2SchneiderElectric-LVFDItraining–ChenXiliang–201503选择性的定义●无论什么故障条件:●过载,●短路●绝缘由障;●只能由最靠近故障点的上级断路器脱扣●非故障回路保持闭合,持续供电其他出线回路的供电不受影响CB1只有CB2脱扣CB23SchneiderElectric-LVFDItraining–ChenXiliang–201503各种选择性技术4SchneiderElectric-LVFDItraining–ChenXiliang–2015031000A100A选择性区间电流选择性T(s)I(A...